Cortelco Telephone 2747 User Manual

VOIP 2747  
IP Phone  
User Manual  
274701-VIP-PAK  
Cortelco  
Release 5.1  
Download from Www.Somanuals.com. All Manuals Search And Download.  
4.1.2  
Others...................................................................................................31  
4.1.2.1 MAC Address...................................................................................31  
4.1.2.2 NTP Server.......................................................................................31  
4.1.2.3 Time Zone........................................................................................32  
H.323 CONFIGURATION ON WEB .................................................................32  
4.2  
4.2.1  
4.2.2  
4.2.3  
H.323 Parameters................................................................................32  
Forward Mode .....................................................................................32  
Advanced..............................................................................................33  
4.2.3.1 Min Media Port :..............................................................................33  
4.2.3.2 Max Media Port : .............................................................................33  
4.2.3.3 Codec : .............................................................................................33  
SIP CONFIGURATION ON WEB......................................................................33  
4.3  
4.3.1  
4.3.2  
4.3.3  
SIP Parameters ....................................................................................34  
Forward Mode .....................................................................................34  
Advanced..............................................................................................34  
4.3.3.1 Reg From .........................................................................................34  
4.3.3.2 Reg To..............................................................................................34  
4.3.3.3 Reg Expire .......................................................................................34  
4.3.3.4 Min Media Port................................................................................34  
4.3.3.5 Max Media Port ...............................................................................34  
4.3.3.6 Codec ...............................................................................................34  
PHONE CONFIGURATION ON WEB ................................................................35  
4.4  
4.4.1  
4.4.2  
Prefix....................................................................................................35  
Voice.....................................................................................................35  
4.4.2.1 Ring Volume ....................................................................................35  
4.4.2.2 Handset Volume ...............................................................................36  
4.4.2.3 Handsfree Volume............................................................................36  
4.4.2.4 CodecTxGain...................................................................................36  
4.4.2.5 Ring Type.........................................................................................36  
4.4.2.6 RTPLowBW.....................................................................................36  
4.4.2.7 Jitter Buffering.................................................................................36  
4.4.3  
Others...................................................................................................36  
4.4.3.1 VAD .................................................................................................36  
4.4.3.2 BG Noise Level................................................................................37  
SYSTEM CONFIGURATION............................................................................37  
4.5  
5
CALL FUNCTIONS..........................................................................................38  
5.1  
5.2  
MAKING CALLS ..........................................................................................38  
RECEIVING CALLS.......................................................................................38  
2
Download from Www.Somanuals.com. All Manuals Search And Download.  
5.3  
5.4  
5.5  
5.6  
CHECK CALL HISTORY (INCOMING / OUTGOING / MISSED CALLS).................38  
REDIAL .......................................................................................................39  
CALL FORWARD ..........................................................................................39  
CALL TRANSFER .........................................................................................39  
Blind Transfer ......................................................................................39  
Attended Transfer.................................................................................39  
CALL HOLD.................................................................................................40  
5.6.1  
5.6.2  
5.7  
5.8  
PHONE BOOK AND SPEED DIAL............................................................40  
ATTACHMENT.................................................................................................41  
6
6.1  
6.2  
H.323 INTEROPERABILITY LIST...................................................................41  
SIP INTEROPERABILITY LIST.......................................................................43  
3
Download from Www.Somanuals.com. All Manuals Search And Download.  
1 Overview  
1.1 Introduction  
Cortelco Inc. and its suppliers believe that the next generation of networks  
based on VoIP technologies will significantly change the way people communicate  
with each other. To get the greatest benefit from these technologies, the use of VoIP  
should be simple to most users. Our mission is to make your VoIP experience just  
as straightforward as using a normal telephone set.  
The VOIP 2747 is a next generation IP Phone that provides a cost-saving  
solution for small business/home users for their telecommunication needs. The VOIP  
2747 follows the open standard SIP/H.323 protocols to make sure that the user can  
easily install this IP phone on most of the existing VoIP (Voice over IP) services. By  
using state-of-the-art DSP (Digital Signal Processing) technology, the VOIP 2747  
delivers outstanding voice quality that is comparable to PSTN.  
With the built in LCD display, the user can easily configure the VOIP 2747 for  
first time installation in just a few minutes. In addition to the advanced VoIP  
functions and easy installation, the VOIP 2747 also provides rich telephone features  
such as last number redial, speed dial, call forward/transfer, call history, volume  
adjustment and speakerphone. Cortelco’s VOIP 2747 is your best VoIP solution for  
the next generation of communication.  
1.2 Key Features  
H.323 version 4 standard :  
o
Supports Fast start, Tunneling and H.245 DTMF relay.  
RFC-3261 SIP standard :  
o
Supports password authentication using MD5 digest and RFC-2833 for  
DTMF relay.  
Dynamic IP support (DHCP and PPPoE) :  
4
Download from Www.Somanuals.com. All Manuals Search And Download.  
o
Gets IP from DHCP server using DHCP protocol or through ADSL  
modem using PPPoE protocol, automatically reconnects when PPPoE  
loses connection.  
Pass through NAT devices:  
Can make outgoing and incoming calls under any NAT device (even  
o
under two layer NAT devices) when working with the specific  
gatekeeper/proxy device.  
Remote software upgrade capability (via ftp):  
FTP protocol provides reliable remote upgrade via Internet.  
o
Advanced Digital Signal Processing (DSP) technology to ensure superior  
audio quality:  
o
Hardware System on a Chip solution with built in DSP processor  
ensures perfect voice quality.  
Supports G.723.1, G.729A/B, G.711 (A-law/U-law) voice codecs :  
Follows ITU-T standard for best compatibility.  
o
Supports supplementary services, including immediate (unconditional) call  
forwarding, busy call forwarding, no answer call forwarding and call  
hold/transferring.  
Provides call history:  
o
Records incoming call history, outgoing call history, missed (not  
accepted) call history, and lets users make a direct call from the call  
history log.  
Phone Book : 50 entries  
Speed dial : 10 entries  
Supports Silence Suppression, VAD (Voice Activity Detection), CNG  
(Comfort Noise Generation) :  
o
Silence suppression can save about half of the network bandwidth  
needed during normal VoIP conversation.  
Ping function supported :  
Pings another device on the Internet from the VOIP 2747 to make sure  
the Internet connection is ok.  
o
System status display on the LCD panel :  
5
Download from Www.Somanuals.com. All Manuals Search And Download.  
o
o
User can easily observe if the VOIP 2747 is working normally and  
monitor the system status (network status, registering status) from the  
LCD panel display.  
A “PKT Trace” function is supported to display the packets received  
on the LCD panel and helps network administrator find the problem on  
line.  
Call with or without gatekeeper / proxy(direct IP dialing) :  
o
Follows standard SIP / H.323 protocol and is compatible with most  
existing SIP proxy / H.323 gatekeepers.  
Provides easy configuration methods:  
o
o
Setting by keypads on the phone.  
Setting by web browser.  
Supports RFC-3261, H.323, TCP/UDP/IP, RTP/RTCP, HTTP, ICMP, ARP,  
DNS, DHCP, NTP/SNTP, FTP, PPP, PPPoE protocols.  
Interoperable with most of the existing SIP/H.323 VoIP devices (IP-phone,  
gateway, gatekeeper, proxy, soft-switch, IP-PBX), including Microsoft  
NetMeeting, Cisco gateways / gatekeepers:  
o
Please refer to the section 6.2/6.3 Interoperability List for a complete  
listing.  
The WAN Port works with either straight through or crossover Ethernet cable.  
6
Download from Www.Somanuals.com. All Manuals Search And Download.  
1.3 Hardware Specification  
HARDWARE SPEC  
Spec\Model  
VOIP 2747  
PC Port  
1xRJ45 10/100 Base-T Ethernet, line auto-sensing/switching.  
WAN Port  
1xRJ45 10/100 Base-T Ethernet, line auto-sensing/switching.  
LCD display  
Phone Case  
2x16 characters  
36-button keypad  
Input: 100-240V AC  
Universal Switching Power Adaptor  
Output: +7V DC, 800mA  
8 Ohm/0.2 Watt speaker for speakerphone operation  
19cm(W)x23cm(D)x9cm(H)  
870 g  
Speaker  
Dimension  
Weight  
Operating Temperature  
Humidity  
32 - 104°F (0 – 40°C)  
10%-95% (non-condensing)  
UL/EN/FCC Class B  
EMI Compliance  
Table 1. Hardware Specification of VOIP 2747  
7
Download from Www.Somanuals.com. All Manuals Search And Download.  
2 Basic Installation  
2.1 Appearance Introduction  
2.1.1 Key parts of the VOIP 2747  
The key parts of the VOIP 2747 series IP Phone are shown in  
figure 1, and include the following:  
1. 2x16 LCD Display  
2. Keypad  
5. Handset  
6. Ethernet Cable  
7. Power Adaptor  
3. Usage Indicator  
4. User Manual  
1.  
7.  
2.  
3.  
6.  
5.  
4.  
Figure 1. Key parts of the VOIP 2747 series IP Phone  
8
Download from Www.Somanuals.com. All Manuals Search And Download.  
2.1.2 Rear and Back side Panel of the VOIP 2747  
The rear and back side panel illustration is shown in figures 2 and 3;  
main parts include:  
1. RJ-45 Ethernet Port  
2. RJ-45 Ethernet Port  
3. Power Adaptor Jack  
4. Handset Jack  
3.  
2.  
1.  
Figure 2. Rear Panel of the IP Phone  
4.  
Figure 3. Back Side Panel of the IP Phone  
9
Download from Www.Somanuals.com. All Manuals Search And Download.  
2.1.3 Keypad Definition  
Figure 3. Keypad illustration  
1. Light  
The red light blinks when there is an incoming call and provides Message  
Waiting indication.  
2. LCD Display  
Menu and all status displays for user.  
3. Í UP” Key  
When the IP phone is in the menu selection mode, this key is used to scroll  
up the menu items.  
When the IP phone is editing menu item contents, this key is used as “ left  
delete” to delete a digit upon each key press.  
When the IP phone is in dial mode, the “Å” key is used as “delete” key.  
10  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Æ DOWN” Key  
When the IP phone is in the menu selection mode, this key is used to scroll  
down the menu items.  
When the IP phone is editing menu item contents, this key is used as “ right  
shift” to shift the cursor right a digit for each key press.  
4. - IN VOL+  
When the IP phone is in an idle state or user is talking on handset or speaker,  
this key is used to increase/decrease the volume of the incoming voice.  
The volume of speaker, handset and ring are separately adjusted according to  
the mode of current usage. When in idle, “+” key increases the volume of  
the ring tone, and “-” key decreases the volume of the ring tone; in  
hands-free mode, “+” key increases the speaker volume, and “-” key  
decreases the speaker volume; when in handset mode, “+” key increases the  
volume of handset, “-” key decrease the volume of handset.  
5. +OUT VOL-  
Users are able to increase and/or decrease the volume which they transmit  
out to a remote party.  
6. SPEAKER  
This key is pressed to switch between the using the handset and the speaker.  
7. HOLD  
This key places conversation on hold.  
Also see Section 5.6.2.  
8. NET  
When users are not successfully registered to their service provider, this  
button light will blink. User can press this button to try to register again to  
their service provider.  
9. MESSAGE  
This key allows retrieval of Voice Mail messages.  
11  
Download from Www.Somanuals.com. All Manuals Search And Download.  
10. Menu / OK  
When the IP phone is in idle state, this key is used as a “Menu” key to bring  
up the menu selection on the LCD display.  
When inside the menu selection/setting on the LCD display, this key is used  
as an “OK” key to enter into a lower level of menu selection or to accept the  
edited item’s contents.  
When the IP phone is in dial mode, the “OK/Menu” key is used as a “Dial  
Out” key.  
11. Cancel  
When the IP phone is in the menu selection, this key is used to escape to an  
upper level of the menu selection.  
When the IP phone is in menu edit mode, this key is used to cancel current  
edit and escape to an upper level of the menu selection.  
12. TXT ←→ NUM  
When users need to enter information in text characters, press this button  
and the alphabet shown on the keypads will be displayed.  
13. TRANSFER  
See Section 5.6.  
14. Redial / Dial  
When the IP phone is off-hook and a number is dialed, this key is pressed to  
call out. The “#” key will also perform this function on many systems.  
When the IP phone is off-hook and this key is pressed immediately, the last  
dialed number will be called out right away.  
12  
Download from Www.Somanuals.com. All Manuals Search And Download.  
15. Speed Dial M1 – M10  
Users are able to store 10 specific phone numbers in the slots of M1 - M10.  
Users are able to make a speed dial call to the specific party by pressing the  
speed dial key from M1 – M10.  
16. Phone Book  
Users are able to store up to 50 phone numbers by pressing the  
“Phonebook” button. For each item of the 50 phone book numbers, the user  
can store both the number and the name for display.  
13  
Download from Www.Somanuals.com. All Manuals Search And Download.  
2.2 LCD Menu List  
The following is the roadmap for the menu on your IP phone:  
(SIP & H.323 share a similar menu, different parts are written separately.)  

View  
¾ Network Value  
¾ IP Address  
¾ Network Mask  
¾ Default Route  
¾ DNS Server  
¾ Ping  
¾ Restart  
¾ Image Version  
¾ (Yes / No) PKT Trace  

Configure (Password: 135)  
¾ Network  
¾ (Yes / No) Dynamic IP  
¾ (Yes / No) PPPoE  
If yes:  
¾
¾
¾
PPPoE User Name  
PPPoE Password  
¾ Static IP  
¾
¾
¾
¾
IP Address  
Network Mask  
Default Route  
DNS Server  
¾ Time Zone  
¾ H323  
¾ Number  
¾ Password  
¾ H.323 ID  
¾ (Yes / No) Reg to GK  
¾ (Yes / No) RTPLowBW  
14  
Download from Www.Somanuals.com. All Manuals Search And Download.  
¾ SIP  
¾ Disp Name  
¾ Login ID  
¾ Number  
¾ Password  
¾ (Yes / No) Proxy On  
¾
If Yes:  
¾
¾
Proxy Address  
Proxy Port  
¾ (Yes / No) Outbound Proxy  
If Yes:  
¾
¾
¾
Outbound Proxy IP  
Outbound Proxy Port  
¾ (Yes / No) RTPLowBW  
¾ Forward Mode  
¾ (Yes / No) Immediate  
If Yes:  
Immediate Number  
¾ (Yes / No) Busy  
If Yes:  
Busy Number  
¾ (Yes / No) No Answer  
If Yes:  
¾
¾
¾
¾
¾
¾
¾
No Answer Number  
No Answer Time  

Advanced  
¾ System  
¾ DSP Version  
¾ Upgrade / DnLoad  
¾ FTP Server IP  
¾ Image File Name  
¾ Upgrade Image  
¾ Upgrade Loader  
¾ Config Profile  
¾ Debut Mode  
¾ Dump Address  
¾ Dump Size  
15  
Download from Www.Somanuals.com. All Manuals Search And Download.  
¾ Dump!  
¾ Network  
¾ MAC Address  
¾ NTP Server  
¾ Restart Count  
¾ RTP Process  
¾ (Yes / No) Bypass Server  
¾ (Yes / No) Jitter Buffer  
¾ (Yes / No) Auto Upgrade  
¾ Phone Advanced  
¾ Codec  
¾ G.711u  
¾ G.711a  
¾ G.729  
¾ G.723  
¾ Voice  
¾ (Yes / No) VAD  
¾ BG Noise Level  
¾ Volume  
¾ Ring Volume  
¾ Handset Volume  
¾ Hand free Volume  
¾ Codec Tx Gain  
¾ Scrn Con (0-9)  
¾ Ring Type (1-10)  
¾ UI Mode  
¾ Console  
¾ Lcd  
¾ Both  
¾ SIP Advanced  
¾ Protocol  
¾ Min Media Port  
¾ Max Media Port  
¾ Reg From  
¾ Reg To  
¾ Reg Expire  
¾ Reg Action  
¾ Local Port  
16  
Download from Www.Somanuals.com. All Manuals Search And Download.  
¾ User Setting  
¾ Platform  
¾ Billing Server  
¾ Login  
¾ User Name  
¾ Password  
¾ Confirm Password  
¾ Statistics  
¾ User Statistics  
¾ User Statistic  
¾ Phone Statistic  
¾ Phone Statistics  
¾ Call Missed  
¾ Call Received  
¾ Call Dialed  
¾ Additional  
¾ International  
¾ My Country Code  
¾ Area Prefix Code  
17  
Download from Www.Somanuals.com. All Manuals Search And Download.  
2.3 Installation Environment  
Figure 4. Installation Environment  
Step 1:  
Connect your IP phone to its handset by plugging one end of the coil cord  
into the handset and the other end into the jack on the bottom of the IP  
phone. To connect to the internet, plug into the middle jack on the back of  
the IP phone. This jack is marked WAN. See figure 4 above  
Step 2:  
If you would like to have your PC online at the same time, please connect  
the far right port to your PC. This Jack is marked PC. See figure 4  
above.  
Step 3:  
Please plug in your power adaptor to your IP phone and power source.  
LCD of your IP phone will display “Starting…….” and then “SIP / Hi xxx”  
menu within approximately 4 seconds.  
18  
Download from Www.Somanuals.com. All Manuals Search And Download.  
3 Configuration from Keypads  
The VOIP 2747 series IP Phone is designed to be installed easily and is very  
user-friendly so almost all the configurations can be done through the keypad and  
LCD screen display on the phone set in a few minutes. In order to make a VoIP  
call, please configure through the keypad as described in the following few  
sections:  
Notice:  
(1). When needing to input a character in any menu item, please press that key  
button quickly to switch between different characters to set the correct one.  
(2). When the input mode is in digit mode (you can only input ‘09and ‘*’,  
‘#’), and you want to input a character, please press “TXT ←→ NUM” key  
first to toggle to “character” input mode.  
3.1 Network Configuration  
The first step in using the VOIP 2747 IP Phone is to set the network  
configuration to let the IP Phone connect to internet. This step depends on  
your network environment and phone models, so please use the proper  
method in configuring the IP Phone for your internet connection.  
3.1.1 Dynamic IP Method (DHCP)  
Most of the network environment in an office, hotel room or at home is  
under a NAT (IP sharing)/router device. Under this environment, the easiest way  
to connect to internet is using DHCP. The IP Phone, when configured using the  
following method, will get the IP parameters dynamically, and connect to the  
internet automatically.  
Configure Password135 Network (Yes/No) Dynamic IP  
Please press “ok” key to set Yes on (Yes / No) Dynamic IP when using  
DHCP.  
Most cable modem connections also use DHCP.  
19  
Download from Www.Somanuals.com. All Manuals Search And Download.  
3.1.2 PPPoE Method  
Many of the broadband network connections now provided are ADSL  
connections. Under this environment, the IP Phone can directly connect to the  
ADSL modem by setting the PPPoE account (user name and password) provided  
by the ADSL service provider.  
Configure Password135 Network (Yes/No) PPPoE  
Please press “ok” key to set Yes on (Yes/No) PPPoE when using PPPoE  
method, then key in the account from the ISP.  
PPPoE Username – please input the user name of the account given by your  
ADSL ISP.  
PPPoE Password – please input the password of the account given by your  
ADSL ISP.  
3.1.3 Static IP Method  
For the other network environments, the users will need to set the static IP  
provided by their ISP or from the office MIS representative.  
Configure Password135 Network Static IP  
Under the “Static IP” submenu, please key in the IP address, network mask  
and default router settings provided by your ISP or a private IP address.  
Once all the network settings are complete, please restart your IP phone.  
To check whether your internet connection is working properly, go to View Æ  
Ping, then key in a public IP address to ping it. If the response is ok, then the  
network settings are complete.  
20  
Download from Www.Somanuals.com. All Manuals Search And Download.  
3.2 Registration to GK / Proxy Server  
After the network environment is set and connected to the Internet, you can  
register the IP Phone to your H.323 gatekeeper or SIP Proxy server. Please choose  
one of the following methods to register to a gatekeeper or proxy server. (Method  
depends on your IP Phone model)  
3.2.1 Registration to a gatekeeper (H.323 version)  
When the VoIP vendor/operator is running the H.323 system, use the VOIP  
2747 to register to the gatekeeper. Configure the following parameters to do the  
registration.  
Configure Password135 H323  
A.  
Number – please input the phone number to register to the gatekeeper.  
B. Password – please input the password to register to the gatekeeper.  
This password is carried in the H.235 message for authentication  
purpose. (Not every gatekeeper needs this field, if not needed, keep it  
empty.)  
C.  
H323_ID – please input the H.323 ID to register to the gatekeeper.  
(Not every gatekeeper needs this field, if not needed, keep it empty.)  
D. (Yes/No) Reg To GK – please select Yes and register to the gatekeeper.  
The gatekeeper IP address is not configurable at the keypad if this IP  
Phone is provided by the vendor/operator. If you really want to change this  
setting, please go to “web settings” and change it under the H.323 web  
configuration page.  
If the IP Phone does not register to any gatekeeper, it can still call to  
other IP phones by calling the IP address directly.  
E.  
(Yes/No) Full RRQ – whether to register with full RRQ(* Default (No))。  
In a normal situation, the IP Phone will automatically re-register to the  
gatekeeper periodically with minimum information to keep the connection  
21  
Download from Www.Somanuals.com. All Manuals Search And Download.  
alive. Some gatekeepers require the devices to keep re-registering to it using  
the full information, in this case, please set the “FullRRQ” to “Yes”.  
Note: The VOIP 2747 can pass the NAT/router devices if the gatekeeper supports  
this function. The IP Phone will automatically detect if the gatekeeper supports  
this and do the proper configuration to work under this NAT environment.  
3.2.2 Registration to a proxy server (SIP version)  
When the VoIP vendor/operator is running the SIP system, use the VOIP  
2747 to register to the proxy server. Configure the following parameters to do  
the registration.  
Configure Password135 SIP  
A. Number – please input the phone number (username) to register to the proxy  
server.  
B. Password – please input the password to register to the proxy server.  
This password is carried in the SIP Proxy-Authorization field using  
MD5 digest method for authentication purposes. Not every proxy server  
needs this field; if not needed, keep it empty.  
Cortelco’s VOIP 2747 follows the standard RFC-2617 to do the  
authentication.  
C. Login ID – please input the username for registration authorization.  
When the IP Phone is registering to the proxy server, the Authorization  
field will have the username=”xxxxx” field; if the “Login ID” entry is empty,  
the username will use the “Number” input value, but when the “Login ID”  
field has some value, the username will use this “Login ID” value for  
authorization.  
D. (Yes / No) Proxy On – please select Yes and register to the proxy server.  
After this item is enabled, two more menu items will appear. One is the  
proxy server address, to set the IP address or domain name address of the  
22  
Download from Www.Somanuals.com. All Manuals Search And Download.  
proxy server. Another is the proxy server port, to set the port of the proxy  
server; its value is usually 5060 unless specified by the service vendor.  
If the IP Phone does not register to any proxy server, it still can call to  
another IP phone by calling the IP address directly.  
E. (Yes / No) Outbound Proxy – please set this item to Yes if the registration  
needs to pass through the Outbound Proxy server.  
23  
Download from Www.Somanuals.com. All Manuals Search And Download.  
3.3 Registration / Startup message  
When the network and registration configurations are set, please restart the IP  
Phone. The LCD display on the IP phone will show one of the following  
messages: (depends on whether the registration is ok or not.)  
(a). When the IP Phone is registered to a H.323 gatekeeper successfully, the  
LCD screen will display the following message:  
Hi (number)  
Date  
Time  
This means that the VOIP 2747 is working OK and is ready for  
outgoing/incoming calls. The number inside braces () is the IP phone’s  
number.  
Hi (GK Off)  
Date  
Time  
This means that the VOIP 2747 is working OK and is ready for  
outgoing/incoming calls. However, if the “Reg to GK” flag is “No”, then the  
IP Phone does not need to register. In this case, you can call the IP address of  
other IP Phone directly.  
(b). When the IP Phone is registered to a SIP proxy server successfully, the LCD  
screen will display the following message:  
SIP (number)  
Date  
Time  
This means that the VOIP 2747 is working OK and ready for  
outgoing/incoming calls. The number inside braces () is the IP phone’s  
number.  
SIP (Proxy Off)  
Date  
Time  
This means that the VOIP 2747 is working OK and ready for outgoing /  
24  
Download from Www.Somanuals.com. All Manuals Search And Download.  
incoming calls. If the “Proxy On” flag is “No”, then the IP Phone does not  
need to register. In this case, you can call the IP address of another IP Phone  
directly.  
(c). When the IP Phone is configured to use a gatekeeper or proxy server, but  
has not yet registered successfully or failed, the LCD screen will display the  
following message:  
Registering (number)  
Date  
Time  
When the “Registering” message is displayed, the IP phone can not  
make any calls. The menu selection and the on-hook / off-hook function  
will work OK.  
(d). If the IP Phone failed in registering to a H.323 gatekeeper or SIP proxy  
server, the LCD screen will display the following message:  
RegFail (failed message)  
Date  
Time  
The failed message could be one of the following:  
(1). Duplicate: this means that the registering number is duplicated with  
others, or the IP Phone’s previous registration information is still kept  
in the gatekeeper/proxy server if not unregistered last time (this could  
happen when the IP Phone is powered off instead of restarted from the  
menu item). If the previous registration information is not cleared, you  
may need to wait about 4 minutes to let the IP Phone register  
successfully again.  
(2). Security : this means that the account (username / password / H.323  
ID) is not correct, please check your account again.  
When the RegFail message is displayed, the IP phone can not make  
any calls. The menu selection and the on-hook / off-hook function will work  
OK.  
25  
Download from Www.Somanuals.com. All Manuals Search And Download.  
(e). When the IP Phone fails in obtaining an IP address from the DHCP server, the LCD  
screen will display the following message :  
DHCPFail (number)  
Date  
Time  
This means that the IP phone is configured to use DHCP to get an IP  
address, but the DHCP procedure failed (cannot find a DHCP server or the  
DHCP server rejected the IP assignment). The IP phone can not make any  
calls and the on-hook / off-hook functions will not work, you can not hear  
any sound on the handset or the speaker. Only the menu selections will  
work.  
The IP phone will continuously try to get the IP address from the  
DHCP server, so, if the DHCP server is responding, the DHCPFail ()  
display will change to Hi() display to notify that the IP phone is working  
OK.  
(f). When the IP Phone is set to use the PPPoE method for network connection,  
but has some problem in finding the PPPoE server (ADSL modem), the  
LCD screen will display the following message :  
PPPoE FindFail(number)  
Date  
Time  
This means that the IP phone is configured to use PPPoE to get an IP  
address, but the PPPoE procedure failed (can not find a PPPoE server or the  
network connection has a problem). The IP phone can not make any calls,  
but the menu selection and the on-hook / off-hook function will work OK.  
(g). When the IP Phone is set to use the PPPoE method for network connection,  
but has some problem in the PPPoE account, the LCD screen will display  
the following message:  
PPPoE AuthFail (numer)  
Date  
Time  
This means that the IP phone is configured to use PPPoE to get an IP  
address, but the PPPoE server refuses the connection because the  
26  
Download from Www.Somanuals.com. All Manuals Search And Download.  
username/password is not correct. The IP phone can not make any calls, but  
the menu selection and the on-hook / off-hook function will work OK.  
(i). When the IP Phone is enabled to “Immediate Forward”, the LCD screen will  
display the following message :  
FWD(number)  
Date  
Time  
This means that the VOIP 2747 is working OK and ready for  
outgoing/incoming calls. For any incoming call, it will be forwarded to the  
“Immediate Forward Number”, and this IP Phone will not ring. See Sect.  
3.4.  
3.4 Call Forward Configurations  
The phone supports three different Call Forwarding modes. These modes are  
selected using the “Configure”Æ”Forward Mode” option.  
3.4.1 Immediate Forward  
To enable Immediate Forward mode, Press MENU/OK with Item 1 Immediate  
selected. The display will change to 1. (Yes) Immediate and 2. Immed Number  
will appear. Press DOWN Then MENU/OK to enter the target number for  
Immediate Forwarding. The display will show Immed Number =. Enter the  
number using the keypad and press MENU/OK. Then press CANCEL three  
times. The display will show FWD(Ext Number). If Immediate forwarding is  
selected, all calls to the phone will be sent to the target number.  
When Immediate Forwarding is enabled, Busy Forward and No Answer  
Forward can not be enabled.  
27  
Download from Www.Somanuals.com. All Manuals Search And Download.  
3.4.2 Busy Forward  
To enable Busy Forward mode, Press MENU/OK with Item 2 Busy selected.  
The display will change to 2 (Yes) Busy and 3. Busy Number will appear. Press  
DOWN Then MENU/OK to enter the target number for Busy Forwarding. The  
display will show Busy Number =. Enter the number using the keypad and  
press MENU/OK. Then press CANCEL three times. The display will show  
SIP(Ext Number). If Busy forwarding is selected, all calls to the phone will be  
sent to the target number when the phone is in use.  
3.4.3 No Answer Forward  
To enable No Answer Forward mode, Press MENU/OK with Item 3 No  
Answer selected. The display will change to 3 (Yes) No Answer and 4. NoAns  
Number will appear. Press DOWN Then MENU/OK to enter the target number  
for No Answer Forwarding. The display will show NoAns Number =. Enter  
the number using the keypad and press MENU/OK. Then press CANCEL.  
Now Press DOWN and then MENU/OK to enter the No Answer time. This sets  
the amount of time in seconds before the call will be forwarded if it is not  
answered. Enter the time and press CANCEL three times. The display will  
show SIP(Ext Number).  
3.5 Configurations under “View” item  
Under the “View” menu item, there are many submenu items. These are mainly  
for information about the phone’s current status, but they also provide simple  
functions to check the status of the network.  
3.5.1 View current network settings  
By selecting “View”Æ”Network Value”, it is possible to see the current IP  
Address, network mask, default router and DNS server address. The phone  
may get its IP address from DHCP or PPPoE or it may have a static address. The  
“View”Æ”Network” menu allows the user to determine the actual IP address.  
3.5.2 Ping another device  
The “Ping” function is one of the most commonly used tools to determine the  
28  
Download from Www.Somanuals.com. All Manuals Search And Download.  
state of a network connection. By selecting “View”Æ”Ping” and keying in the  
IP address or domain name of another device, the phone can check the status of  
its connection to that device. This can also be used to check the status of the  
Internet connection by pinging another device that is already on the public  
Internet.  
3.5.3 Restart  
By selecting “View”Æ”Restart”, the VOIP 2747 will perform a “warm restart.”  
This will unregister the phone from the gatekeeper or proxy server, and will also  
disconnect the modem connection if a modem is connected.  
3.5.4 Display current software version  
By selecting “View”Æ”Image Version”, the phone will display the current  
software version. The software version is identified by the date of the release of  
the software image.  
3.5.5 Packet Trace for signal monitoring  
Setting the “View”Æ”PKT Trace” to (Yes) will cause the phone to display all the  
signaling messages received on the LCD screen. This may be useful for  
debugging.  
3.6 Advanced Configuration  
DTMF Relay –For In-Band DTMF --Press “MENU” button, choose “Advanced”  
and press “MENU/OK”. Password is “1230”, press “MENU/OK”. Choose  
Phone Advanced Menu, press “MENU/OK”.  
Choose DTMF, press  
“MENU/OK”. Choose DTMF Relay, press “MENU/OK”. Choose INFO, and  
press “MENU/OK”. Restart the phone.  
29  
Download from Www.Somanuals.com. All Manuals Search And Download.  
4 Web Configuration  
The phone provides a web interface for configuration. Please note that the  
web interface will only work with Internet Explorer. To use this configuration  
method, enter the IP address of the phone into the browser address bar. The  
following login window will appear:  
root  
ƒ
Username:  
Password:  
****  
ƒ
enter  
The default username is “root”, and the default password is “1234”.  
Please type these into the boxes shown and then click the “enter” button or press  
Enter on your keyboard. This will bring up the home page of the phone as  
shown below.  
This page provides basic information and also allows selection of additional  
pages for more detailed configuration.  
30  
Download from Www.Somanuals.com. All Manuals Search And Download.  
4.1 Network Configuration on web  
Clicking on the “Network” icon on the left banner will bring up following  
page to allow network configuration.  
4.1.1 Basic  
Please see section 3.1 for an explanation of each field.  
4.1.2 Others  
4.1.2.1 MAC Address  
View the MAC Address of the IP Phone. The MAC Address cannot be  
changed at this screen.  
4.1.2.2 NTP Server  
Set the NTP (Network Time Protocol) server’s IP Address. The  
phone can use NTP to display the current date and time.  
31  
Download from Www.Somanuals.com. All Manuals Search And Download.  
4.1.2.3 Time Zone  
Used to specify the time zone.  
Clicking the “View” icon will  
display a list of all available time zones. For example, the value  
should be set to -6 for US Central Time.  
4.2 H.323 Configuration on web  
Clicking on the “H.323” icon on the left banner will display the following page to  
allow configuration of H.323 related parameters.  
4.2.1 H.323 Parameters  
Please see section 3.2 for the explanation of each field.  
4.2.2 Forward Mode  
Please see section 3.4 for the explanation of each field.  
32  
Download from Www.Somanuals.com. All Manuals Search And Download.  
4.2.3 Advanced  
4.2.3.1 Min Media Port :  
The minimum value of the range of the transmitted RTP packet’s port.  
4.2.3.2 Max Media Port :  
The maximum value of the range of the transmitted RTP packet’s port.  
4.2.3.3 Codec :  
The type of the Codec of the transmitted RTP packets.  
4.3 SIP Configuration on web  
Clicking on the “SIP” icon on the left banner will display the following page to  
allow configuration of SIP related parameters.  
33  
Download from Www.Somanuals.com. All Manuals Search And Download.  
4.3.1 SIP Parameters  
Please see section 3.2 for an explanation of each field.  
4.3.2 Forward Mode  
Please see section 3.4 for an explanation of each field.  
4.3.3 Advanced  
4.3.3.1 Reg From  
Modifies the “From:” field in the SIP / SDP messages. This field  
should be left empty in most cases.  
4.3.3.2 Reg To  
Modifies the “To:” field in the SIP / SDP messages. This field should  
be left empty in most cases.  
4.3.3.3 Reg Expire  
Modifies the “Expires:” field in the SIP/SDP messages. This will  
control the re-registration period.  
4.3.3.4 Min Media Port  
The minimum value of the range of the transmitted RTP packet’s port.  
4.3.3.5 Max Media Port  
The maximum value of the range of the transmitted RTP packet’s port.  
4.3.3.6 Codec  
The type of codec used to transmit RTP packets. In SIP calls, the type  
of codec used is determined by the called party.  
34  
Download from Www.Somanuals.com. All Manuals Search And Download.  
4.4 Phone Configuration on web  
Clicking on the “Phone” icon will display the following page to allow  
configuration of phone related parameters.  
4.4.1 Prefix  
These entries are used for VoIP systems which require special treatment of  
country codes, international codes, and area codes.  
Any numbers placed in the “My Country Code” and “Area Prefix Code”  
boxes will be appended to the front of dialed numbers.  
Any numbers placed in the “International Code” box will be removed  
from the front of dialed numbers.  
In most cases, these values are not needed and the boxes should be left  
empty.  
4.4.2 Voice  
4.4.2.1 Ring Volume  
Adjusts the volume of ringing.  
35  
Download from Www.Somanuals.com. All Manuals Search And Download.  
4.4.2.2 Handset Volume  
Adjusts the volume of incoming calls on the handset.  
4.4.2.3 Handfree Volume  
Adjusts the volume of incoming calls on the handsfree.  
4.4.2.4 CodecTxGain  
Adjust the output voice volume.  
4.4.2.5 Ring Type  
Changes the ringing type(ring pattern) of an incoming call.  
4.4.2.6 RTPLowBW  
Checking this box will cause the phone to decrease the voice packet  
bandwidth in the transmit direction. This should only be used if the  
internet bandwidth is not good enough to support normal packet  
bandwidth.  
4.4.2.7 Jitter Buffering  
Checking this box will increase the jitter buffer from 150ms to 400ms.  
This may improve the received voice quality in some internet  
connections.  
4.4.3 Others  
4.4.3.1 VAD  
Checking this box will enable Voice Activity Detection. With this feature  
enabled, the phone will detect if the user is talking and will not send  
packets when the user is silent. This can help to decrease the bandwidth  
requirement.  
36  
Download from Www.Somanuals.com. All Manuals Search And Download.  
4.4.3.2 BG Noise Level  
This value controls the sensitivity of the VAD detection.  
4.5 System Configuration  
Clicking on the “System” icon will display the following page to allow  
configuration of system related parameters.  
This page allows software upgrades, username/password changing, and rebooting  
(restarting).  
37  
Download from Www.Somanuals.com. All Manuals Search And Download.  
5 Call Functions  
5.1 Making Calls  
To make a call, pick up the handset or press the SPEAKER button, dial the called  
party’s number, and end with “#” key or RE/DIAL.  
5.2 Receiving Calls  
To answer a call when the phone is ringing, pick up the handset or press the  
SPEAKER button.  
5.3 Check call history (incoming / outgoing / missed calls)  
The call history can be displayed on the LCD screen by pressing the “Å” key or  
the “Æ” key when the phone is idle.  
There are three kinds of call history:  
Incoming is the record of numbers and time of the last 10 incoming calls when  
answered  
Outgoing is the record of numbers and time of the last 10 successful outgoing  
calls.  
Missed is the record of numbers and time of the last 10 incoming calls that were  
not answered  
When viewing the call history, press the “MENU/OK” key to do one of the  
following three actions:  
1.Dial – To call the number press the “MENU/OK” key again.  
2.Delete – To delete this item from the call history press the DOWN key and  
then press “MENU/OK”  
3.To Phone Book – To add this item to the phone book, press the DOWN  
key twice and then press “MENU/OK” Name = will appear on the  
display. A name can be added to this number by using the keypad.  
When finished, press MENU/OK and the added item will be sorted  
alphabetically in the phone book.  
38  
Download from Www.Somanuals.com. All Manuals Search And Download.  
5.4 Redial  
To call the last dialed number (redial), press the “RE/DIAL” key immediately  
after going off-hook.  
5.5 Call Forward  
Call forwarding functions can be set via the keypad or by web configuration.  
Please refer to section 3.5 for more details.  
5.6 Call Transfer  
This phone supports three types of call transfer. They are ringing transfer, blind  
transfer and attended transfer.  
5.6.1 Ringing Transfer  
When a call is incoming and the IP phone is ringing, by pressing the “Transfer”  
key and then another IP phone’s number you can transfer the call immediately to  
another party without answering the call.  
5.6.2 Blind Transfer  
With blind transfer, the caller is transferred to a third party without informing the  
third party who is transferring the call.  
Example: A calls B and A wants B to transfer the call to C. B presses the  
“TRANSFER” button and waits to hear dial tone. Then B dials C’s number and  
hangs up. A is now transferred to C.  
5.6.3 Attended Transfer  
With attended transfer, the caller is transferred to a third party after the third  
party is informed.  
Example: A calls B and A wants B to transfer the call to C. B presses the  
“HOLD” and waits for dial tone. Then B dial the C’s number and waits for C to  
answer. B can now inform C of the call transfer. When B hangs up, A is  
transferred to C.  
39  
Download from Www.Somanuals.com. All Manuals Search And Download.  
5.7 Call Hold  
As described above, the HOLD button allows attended transfer. If the number  
of the third party is not dialed in 8 seconds, the phone will go into the “Hold”  
state. By pressing HOLD again, the call can be continued  
5.8 Phone Book and Speed Dial  
5.8.1 Phone Book  
The Phone Book allows 50 names and numbers to be stored. To access the  
Phone Book press the “PHONE BOOK” button, the display shows 1.Phone Book  
2.Speed Dial. Press “MENU/OK.” The display now shows 1.Add, 2.Edit,  
3.Delete, 4.Delete All  
5.8.1.1 Add  
After selecting the Phone Book, press “MENU/OK” to select Add. The display  
will show “Name=”. Use the keypad to enter the name and press “MENU/OK”.  
The display now shows “Number=.” Use the keypad to enter the number and  
press “MENU/OK.” Press “CANCEL” twice to return to the idle state.  
5.8.1.2 Edit  
After selecting the Phone Book, press “DOWN” and then “MENU/OK” to select  
Edit. The display will show all the entries in the Phone Book in alphabetical  
order. Used the “UP” and “DOWN” keys to scroll to the desired name and  
press “MENU/OK”. The display now shows 1.Name 2.Number. To edit the  
name, press “MENU/OK”. To edit the number, press “DOWN” and then press  
“MENU/OK”. After pressing “MENU/OK” the display will show the current  
information stored for the name or number. Use the UP and DOWN keys and  
the keypad to make changes, then press “MENU/OK.” Press “CANCEL” four  
times to return to the idle state.  
5.8.1.3 Delete  
After selecting the Phone Book, press “DOWN” twice and then “MENU/OK” to  
select Delete. The display will show all the entries in the Phone Book in  
alphabetical order. Used the “UP” and “DOWN” keys to scroll to the desired  
name and press “MENU/OK” to delete this entry. The display will now show  
the new Phone Book list. Press “MENU/OK” to delete another entry or press  
“CANCEL” three times to return to the idle state.  
5.8.1.4 Delete All  
After selecting the Phone Book, press “DOWN” three times and then  
40  
Download from Www.Somanuals.com. All Manuals Search And Download.  
“MENU/OK” to select Delete All. The display will show “Are You Sure?”.  
Press “MENU/OK” to delete all Phone Book entries. Press “CANCEL” twice  
to return to the idle state.  
5.8.2 Speed Dial  
To access Speed Dial, press the “PHONE BOOK” button, the display shows  
1.Phone Book 2.Speed Dial. Press “DOWN” and then press “MENU/OK.”  
The display now shows the ten speed dial locations M1 through M10. The  
information in these buttons may be viewed or changed.  
5.8.2.1 Speed Dial – View Settings  
After accessing the Speed Dial, use the UP or DOWN key to select the desired  
memory location, then press “MENU/OK” twice. The display will now show  
Current Setting= XXXXX where XXXXX is the name stored in this location.  
Press “CANCEL” four times to return to the idle state.  
5.8.2.2 Speed Dial – Change Settings  
After accessing the Speed Dial, use the UP or DOWN key to select the desired  
memory location, press “MENU/OK”. Then press the “DOWN” key. Then  
press “MENU/OK.” The display will now show a listing of names stored in the  
phone book. Select the information to be stored and press “MENU/OK.”  
Press “CANCEL” three times to return to the idle state.  
6 Attachment  
6.1 H.323 Interoperability List  
The followings devices that have been tested to be interoperable with the 2747 IP  
Phone.  
- Client/Terminal  
Microsoft NetMeeting, Version 3.01  
OpenH323 Phone, Version 1.6.0  
WellTech, LANPhone 101  
Sagitta IP Phone  
RadVision H.323v4 Protocol Stack (IMTC 2002)  
Leadtek Research Inc., BVP8770 Video Phone (IMTC 2002)  
Sony Electronics, PCS-6000 / PCS-1600 (IMTC 2002)  
Aethra Srl (Italy), Vega Pro (IMTC 2002)  
41  
Download from Www.Somanuals.com. All Manuals Search And Download.  
IBM Corporation, Java-based Voice Server (IMTC 2002)  
First Virtual Communications, Click To Meet Web Endpoint (IMTC 2002)  
Innovaphone, IP200 (IMTC 2002)  
UniData iW200  
Cisco7905 IP Phone  
- GateKeeper  
Cisco AS5350 Gatekeeper function  
Citron Network Inc. Gatekeeper  
Radvision ProLab GateKeeper Simulator, Version 1.0, October 2001  
OpenH323 GateKeeper, Version 1.3.2  
GnuGK  
III (Institute, Institute for Information Industry) GateKeeper, Version 1.0  
NexTone Communications Inc., MSW (IMTC 2002)  
MediaDigm Technology Inc. (Canada), SureKeeper (IMTC 2002)  
Lucent iMerge gatekeeper  
Wintel gatekeeper  
MKY gatekeeper  
EZTone gatekeeper  
Tellink gatekeeper  
Hivocal gatekeeper  
GCard gatekeeper  
- Gateway  
D-Link 4-port gateway  
Vanguard Managed Solutions, Vanguard (IMTC 2002)  
AudioCodes Ltd., MP108 (IMTC 2002)  
Cisco Systems Inc., Test Bed#1 (IMTC 2002)  
Polycom Israel, GW-25 (IMTC 2002)  
Antek Tech., 2~16 port gateway  
WellTech gateway  
Quintum gateway  
- MCU  
OpenH323 MCU, Version 1.1.3  
Polycom Israel, MGC-100 (IMTC 2002)  
42  
Download from Www.Somanuals.com. All Manuals Search And Download.  
- SoftSwitch  
ZTE Telcom. Softswitch  
WalkerSun softswitch  
6.2 SIP Interoperability List  
The following devices have been tested to be interoperable with the 2747 series IP  
Phone.  
Client/Terminal  
-SCS-Client V1.00  
-SIPS 2.0.43.11  
-SJ-Phone 1.10.187c  
-X-Lite – FWD V2.0  
-Softphone – Simems V0.90Bata27  
-Estara V3.0.0.15  
-Cisco ATA-186  
-Cisco 7905  
-BCM SIP Phone  
-GrandStream SIP Phone  
Proxy Server  
-Wparty SIP V0.5.0  
-Wparty SIP V0.5.5.2  
-Asterisk 0.5.0  
-Linux – Vovida V1.5  
-SER 0.8.10  
-WalkerSun softswitch  
Gentrice proxy server  
Inphonex platform  
DeltaThree platform  
NEC SV7000 IP PBX  
Trunking Gateway  
-Cisco 5300  
-Quintum D2400  
43  
Download from Www.Somanuals.com. All Manuals Search And Download.  
LIMITED WARRANTY  
If you purchased this product new in the U.S. or Puerto Rico, CORTELCO warrants it against defects in material  
and workmanship for a period of one (1) year from the date of original purchase. This warranty is in lieu of all  
other express warranties. During the warranty period, CORTELCO agrees to repair or, at its option, replace the  
defective product, or any part of it without charge for parts or labor. This is your exclusive remedy. This  
warranty does not cover damage resulting from accident, misuse, abuse, improper installation or operation, lack  
of reasonable care, the affixing of any attachment not provided by CORTELCO with the product and loss of  
parts. The warranty is voided in the event any unauthorized person alters or repairs the unit.  
Telephone companies and ISPs use different types of equipment and offer various types of services to  
customers. CORTELCO does not warrant that this product is compatible with the type of equipment of  
any particular phone company, the ISP, or the services provided by them.  
CORTELCO DISCLAIMS ANY IMPLIED WARRANTY, INCLUDING THE WARRANTY OF  
MERCHANTABILITY AND THE WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE, AS OF THE  
DATE ONE YEAR FROM THE ORIGINAL PURCHASE OF THE PRODUCT. CORTELCO ASSUMES NO  
RESPONSIBILITY FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES.  
THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY HAVE OTHER RIGHTS, WHICH  
VARY FROM STATE TO STATE. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF  
SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LIMITATIONS ON HOW LONG AN IMPLIED  
WARRANTY LASTS, SO THE ABOVE EXCLUSION AND LIMITATION MAY NOT APPLY TO YOU.  
If failure occurs and your 2747 VoIP is in warranty, service shall be provided by returning it to  
CORTELCO - Repair Center, 1703 Sawyer Road, Corinth, Mississippi 38834, shipping  
prepaid. The product will be repaired or replaced if examination by us determines the product to be  
defective.  
2747001VIPPAK  
Revision 5.1  
44  
Download from Www.Somanuals.com. All Manuals Search And Download.  

Conair Electric Toothbrush WJ2B User Manual
Craftsman Blower 358748260 User Manual
Craftsman Drill 31527994 User Manual
Cub Cadet Lawn Mower LTX 1040 User Manual
Desa Stove S39PT User Manual
DXG Technology Camcorder DXG 305VP User Manual
Eaton Electrical Power Supply 164201420B User Manual
Extron electronic Stereo Amplifier 13W3 DA2 User Manual
Fujitsu Air Conditioner AOU15RLQ User Manual
Generac Power Systems Portable Generator 9734 3 User Manual