INSTRUCTION MANUAL
MASTER STATION
AI-MS900
Be sure to leave system installations, adjustments, and data settings to the dealer from whom you have
purchased.
Please follow the instructions in this manual to obtain the optimum results from this unit.
We also recommend that you keep this manual handy for future reference.
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1. SAFETY PRECAUTIONS
• Be sure to read the instructions in this section carefully before use.
• Make sure to observe the instructions in this manual as the conventions of safety symbols and messages
regarded as very important precautions are included.
• We also recommend you keep this instruction manual handy for future reference.
WARNING
CAUTION
Indicates a potentially hazardous situation which,
if mishandled, could result in death or serious
personal injury.
Indicates a potentially hazardous situation which,
if mishandled, could result in moderate or minor
personal injury, and/or property damage.
• Do not expose the unit to rain or an environment
where it may be splashed by water or other liquids,
as doing so may result in fire or electric shock.
• Avoid installing the unit in humid or dusty locations,
in locations exposed to the direct sunlight, near the
heaters, or in locations generating sooty smoke or
steam as doing otherwise may result in fire or
electric shock.
• Do not cut, kink, otherwise damage nor modify the
connection cord. In addition, avoid using the cords
in close proximity to heaters, and never place
heavy objects on the cords, as doing so may result
in fire or electric shock.
• Check the chime volume with the handset placed
on the hook as doing otherwise could impair
hearing.
• Because the unit is an electrical device, users must
not make wiring and installation. Leave the work to
qualified personnel. Improper wiring or installation
may cause electric shock.
• Do not remove the unit from the wall nor change
the unit locations. If the unit is reinstalled at
improper location, it may fall or may hit persons
causing injury.
• Do not disassemble nor modify the unit as doing so
may result in fire or electric shock.
2. FCC REQUIREMENTS
(1) The AI-900 complies with FCC Rules, Part 68. On this equipment is a label which contains, among other
information, the FCC Part 68 registration number.
(2) The ringer equivalence number (REN) is used to determine the quality of devices which may be
connected to the telephone line. Excessive RENs on the telephone line may result in the devices not
ringing in response to an incoming call. In most, but not all areas, the sum of RENs should not exceed five
(5.0). To be certain of the number of devices that may be connected to a line, as determined by the total
RENs, contact the local telephone company.
Note: RENs are associated with loop-start and ground-start ports. It is not used for E&M and digital ports.
The REN assigned to the AI-900 is 0.4. If requested, this information must be given to the
telephone company.
(3) In the event of equipment malfunction, all repairs should be performed by AIPHONE CORPORATION or
an authorized agent. It is the responsibility of users requiring service to report the need for service to
AIPHONE CORPORATION or to one of our authorized agents. Service can be facilitated through our
office at:
AIPHONE CORPORATION
1700-130th Ave., N.E.
Bellevue, Washington 98009
Phone (425) 455-0510
The telephone company can ask you to disconnect the equipment from the network until the problem is
corrected or until you are sure that the equipment is not malfunctioning.
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(4) If the AI-900 disrupts the telephone network, the telephone company can discontinue your service
temporarily. If possible, the telephone company will notify you in advance. If advance notice is not
practical, they will notify you as soon as possible. You are also informed of your right to file a complaint
with the FCC.
(5) The telephone company can make changes in its facilities, equipment, operations, or procedures that can
affect the operation of your equipment. If they do, you should be notified in advance so you have an
opportunity to maintain uninterrupted telephone service.
(6) While the AI-900 is fully compliant with FCC rules and regulations, it is recommended that an alternating
current (ac) surge arrestor of the form and capability suitable for the model purchased be installed in the
ac outlet to which the AIPHONE CORPORATION products are connected. Consult with your distributor as
to the surge protector requirements for your equipment.
(7) The FCC rules require that the following Affidavit be completed by the installer and forwarded to the local
exchange carrier, whenever digital terminal equipment without encoded analog content and billing
protection is used to transmit digital signals containing encoded analog content, which are intended for
eventual conversion into Voiceband analog signals and retransmitted on the network.
(8) The AI-900 has been tested and comply with the limits for a class A digital device, pursuant to Part 15 of
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference
when the equipment is operated in a commercial environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with the instruction manual,
can cause harmful interference to radio communications. Operation of this equipment in a residential area
is likely to cause harmful interference, in which case the user will be required to correct the interference in
the user's expense.
CHANGES OR MODIFICATIONS NOT EXPRESSLY APPROVED BY AIPHONE CORPORATION
COULD VOID THE USER'S AUTHORITY TO OPERATE THE EQUIPMENT.
3. INDUSTRY CANADA REQUIREMENTS
(1) ''NOTICE: This equipment meets the applicable Industry Canada Terminal Equipment Technical
Specifications.
This is confirmed by the registration number. The abbreviation, IC, before the registration number signifies
that registration was performed based on a Declaration of Conformity indicating that Industry Canada
technical specifications were met.
It does not imply that Industry Canada approved the equipment."
(2) ''NOTICE: The Ringer Equivalence Number (REN) for this terminal equipment is 0.4.
The REN assigned to each terminal equipment provides an indication of the maximum number of
terminals allowed to be connected to a telephone interface.
The termination on an interface may consist of any combination of devices subject only to the requirement
that the sum of the Ringer Equivalence Numbers of all the devices does not exceed five.''
(3) "The abbreviation, IC, before the registration number signifies that registration was performed based on a
Declaration of Conformity indicating that Industry Canada technical specifications were met. It does not
imply that Industry Canada approved the equipment.
(4) This Class A digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe A est conforme à la norme NMB-003 du Canada.
4. INSTALLATION PRECAUTIONS
• The whole system will not operate without power supply.
• In areas where broadcasting stations are close by, the system operation may be affected by radio frequency
interference.
• Keep the unit at least 1 m from TV or radio.
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5. GENERAL DESCRIPTION
The AI-MS900 can make calls to or receive calls from the substation or the master station (telephone).
It utilizes 2 pairs of twisted cables.
6. NOMENCLATURE AND FUNCTIONS
A
A
View
[Front]
[View ]
3
1
2
18 19 20
HANDSET REGISTER Do not connect thei jack
to telephone line.
SP. VOL.
OFF ON
4
5
6
LINE
7
MINI.
MAX.
16
ABC
DEF
1
3
5
7
2
4
6
8
1
2
JKL
3
MNO
GHI
4
PRS
5
TUV
6
WXY
7
8
O0PER
9
B
[View ]
17
#
P T T
REDIAL
XFER
C
9 10 12 13
8
11 14 15
B
View
1. Display panel
13. Cancel [C] key
Shows connection status and registered data.
Terminates calls.
2. Internal speaker
14. [REDIAL] key
Sounds call tones and permits "handsfree"
conversation.
3. In-use lamp
Automatically redials the last dialed number.
Also, functions as a station select key to cycle
the display through waiting calls.
Lights when station is busy.
15. Transfer [XFER] key
Used to transfer calls. First press this key, then
dial the station number to which calls are
transferred.
4. Handset
Lift the handset or press the [PTT] key to
respond to a call.
16. Auto dialing keys [1] – [8]
5. Station number card
Automatically dial the registered station number.
Write the station's number in this card.
17. Internal microphone
6. Hook switch
7. Speaker volume selector switch [SP.VOL H/L]
Adjusts the internal speaker's volume level.
8. Station number directory
9. Numeric dialing keys [0] – [9]
Used for dialing
10. [ ] key
Used for registration and dialing operations of
call paging functions or other special functions.
11. [#] key
Used in "handsfree" operation.
18. Handset speaker volume
[HANDSET SP. VOL.]
Adjusts the handset speaker's volume level.
19. Registration ON/OFF switch
[REGISTER ON/OFF]
Set this switch to ON when registering auto
dialing information or other data into the station.
Normally, set this switch to OFF.
20. Line connector [LINE]
Used for registration and dialing operations of
special functions.
Connects the line to the exchange.
12. Press-to-talk [PTT] key
Used for speaking in press-to-talk conversation
mode. Functions as a Response key to answer
incoming calls.
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7. INSTALLATION
7.1. Mounting
7.1.1. Desk-top mounting
Connect the supplied modular-plug cord.
7.1.2. Wall mounting
Pull out, rotate, and reset the cradle hook, then mount the station on the wall using the supplied wall mounting
frame.
Remove the cradle hook.
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7.2. Connection and Adjustment
7.2.1. External speaker connection
Follow the procedures below when connecting an external speaker (8Ω).
Step 1. Remove the AI-MS900's rear terminal cover and set the internal slide switch to the [EXT. SP] position.
Internal/External speaker selection switch
Terminal cover
EXT.SP terminal
Microphone sensitivity control
Internal speaker volume control
Step 2. Connect the speaker cable to EXT.SP terminal.
Speaker cable
Step 3. Replace the removed terminal cover in place.
7.2.2. Internal speaker volume and microphone sensitivity adjustment
The AI-MS900's internal speaker volume and microphone sensitivity can be adjusted by means of their
respective controls located under the terminal cover described above. Both controls are factory-preset to their
maximum positions.
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8. OPERATION
8.1. Calling a Substation
Step 1. Dial the desired substation number. (Dialing can
be performed with the handset on-hook or off-
hook.)
1
2
Step 2. Following a brief call tone, the master station is
automatically connected to the substation. The
master station's voice is heard at the substation
while the master station operator is talking, and
the substation's voice is only heard at the master
station when the master station operator stops
talking.
Brief call tone
Step 3. To terminate the conversation, replace the
handset or press the [C] key.
or
C
8.2. Calling a Master Station (Telephone)
Step 1. Dial the desired station number. (Dialing can be
performed with the handset on-hook or off-hook.)
9
2
Step 2. A trill call tone is heard at the calling station
handset. (This tone will be heard from the
station's internal speaker if dialed with the
handset on-hook.)
Call tone
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Step 3. The call tone stops and conversation can
proceed when the called party answers.
Step 4. To terminate the conversation, replace the
handset or press the [C] key.
or
C
8.3. Being Called
Call tone
Step 1. A trill call tone is heard.
Step 2. Lifting the handset stops the call tone and
permits conversation to proceed. (A response
can also be made by pressing the [PTT] key for
handsfree conversation.)
or
[Response with the [PTT] key]
(1) Simultaneous conversation is possible if the
calling party is speaking with the master
station handset lifted.
PTT
(2) "Press-to-talk" alternate conversation is
possible if the calling party is speaking with
the master station handset on-hook.
Refer to "7.4. Conversation Method" on the next
page.
Step 3. To terminate the conversation, replace the
handset or press the [C] key.
or
C
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8.4. Conversation Method
There are three different conversation methods possible when the master station is used. The conversation
method is determined by the other party's station type and handset use.
(1) Voice-operated switching conversation ("VOX" in
the table below)
When both parties are talking coincidentally, the
master station's (telephone's) party voice is
transmitted to the substation. If the master station's
party stops talking, the substation's party voice can be
heard at the master station.
One-way conversation
One-way conversation
(2) "Press-to-talk" control conversation ("PTT" in the
table below)
The [PTT] key is pressed to talk, and released to
listen.
One-way conversation
PTT
(3) Duplex conversation
Similar to the method of a standard telephone.
Simultaneous conversation
The following table shows the conversation modes for all of the various station combinations.
Quick reference of conversation methods
Master Station
Substation
Telephone
Off-hook
VOX/PTT
Duplex
On-hook
PTT
Duplex
PTT
Substation
VOX
Duplex
VOX
Master station Handset off-hook
Handset on-hook
Telephone
Duplex
VOX: Voice-operated switching conversation
PTT: "Press-to-talk" control conversation
Duplex: Simultaneous conversation
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8.5. Calling Party Display and Selective Response
8.5.1. Calling party display
The master station can only display one of up to 64 calling stations by means of its 6-digit number or 8-
character name. When the master station simultaneously receives calls from two or more stations, the station
with the highest priority is displayed, and other waiting stations are displayed in order of priority as the
[REDIAL] key is pressed. (Substation priorities are registered by system programming.)
Display panel
Example of calling station indication
:
1
3
2
The number of waiting parties
(The currently-displayed party
is not included.)
Calling station No.
REDIAL
key
(Functions as the
station selection key.)
Example of selected calling station indication
:
2 3
Selected calling
station No.
2 /
The order of the waiting station
(Second waiting party)
Note
For telephones, only the first calling station (telephone) number can be displayed. Soon after the conversation
with the station is terminated, the call comes from the next waiting station in priority order and its station
number is displayed. (This feature is available with "Caller ID" compatible telephones only.*)
* Depending on the type of telephone (and its display), even when the telephone simultaneously receives
multiple calls, the number indication may not change, displaying the number different from that of an actual
conversation partner.
[Calls are displayed in the following order of priority]
1. Emergency conference calls
2. Emergency substation calls
3. Incoming outside line calls
4. Normal substation calls
5. Master station or a telephone calls
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8.5.2. Selective response
When multiple calls are simultaneously made to the master station, the master station can select and answer
any desired calling party. (Note this function can only be performed by a dedicated master station and not a
telephone.)
[Operation]
Step 1. Press the [REDIAL] key, and the station number or name of the second calling party will be displayed.
(Subsequent depressions of the [REDIAL] key cycle the display through all waiting station numbers or
names.)
Display panel
Example of calling station indication
:
1
3
2
Calling station No.*1 *2
The number of waiting parties*3
(The currently-displayed party
is not included.)
REDIAL
REDIAL
key
(Functions as the
station selection key.)
:
4 1
1 /
First waiting party*2
Calling station No.*1 *2
REDIAL
:
3
2 /
4
Calling station No.*1 *2
REDIAL
Second waiting party*2
:
3
3 /
6
Calling station No.*1 *2
REDIAL
Third waiting party*2
*1 The name of the calling party may be displayed. Example: Store
*2 Flashes when the call is made from a Emergency substation.
*3 Flashes when the Emergency substation is included.
Step 2. Lift the handset when the desired station number (name) is displayed. The call tone then stops and
conversation can begin. (The [PTT] key may also be pressed for handsfree response.)
or
PTT
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8.6. Auto Dialing
8.6.1. Auto dialing key call
A one-touch press of an auto dialing key automatically dials the station number or functional number of dialing
sequence to activate Paging, Call Forwarding, or other functions assigned to into that key. There are 8 auto
dialing keys [1] – [8].
Call
1
No. 93
Auto dialing key
8.6.2. Auto dialing key registration
Step 1. Set the [REGISTER] switch on the master station's top panel to the ON position. The display panel
will be placed in registration mode.
Step 2. Press the [PTT] key.
The following characters will be displayed.
Step 3. Press the auto dialing key to register.
The selected key number (example: [2]) will be displayed.
Example of auto dialing key [2]
If a station number or functional number has already been assigned to the auto dialing key, the
assigned station number will also be displayed following the auto dialing key number (example: [2]).
Example of auto dialing key [2] already assigned
Step 4. Press the [PTT] key.
Example of auto dialing key [2]
The number, if previously assigned and displayed, will be erased.
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Step 5. Press the new keys to register using the dialing keys [0] – [9] or function keys [ ], [#] or [REDIAL].
Example of "123456" being entered
Notes
• If the [C] key is pressed before dialing a complete number, the contents before the [C] key was
pressed are all erased.
• Mark "-" is displayed when the [REDIAL] key is pressed.
• The display shown below is an example of entering the functional number of paging.
Step 6. Press the [PTT] key after completing the entry of the registration number.
Registration is then completed, as indicated by a confirmation tone.
Example showing the registration completion of "123456"
Step 7. Shift the [REGISTER] switch back to the OFF position. The station will be placed in standby mode.
8.6.3. Auto dialing key registration erasure
Step 1. Set the [REGISTER] switch on the master station's top panel to the ON position. The display panel
will be placed in registration mode.
Step 2. Press the [PTT] key.
The following characters will be displayed.
Step 3. Press the registered auto dialing key to delete. The selected key number (example: [2]) will be
displayed together with the registered number.
Example showing "123456" has been registered
Step 4. Press the [PTT] key.
The registered number displayed after the auto dialing key [2] will be erased.
Example of auto dialing key [2]
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Step 5. Press the [PTT] key again.
The erasure is then completed, as indicated by a confirmation tone.
Example of auto dialing key [2]
Step 6. Shift the [REGISTER] switch back to the OFF position. The station will be placed in standby mode.
8.6.4. Auto dialing key registration confirmation
Step 1. Set the [REGISTER] switch on the master station's top panel to the ON position. The display panel
will be placed in registration mode.
Step 2. Press the [PTT] key.
The following characters will be displayed.
Step 3. Press the registered Auto dialing key to be confirmed. The selected key number (example: [2]) will be
displayed together with the registered number.
Example showing auto dialing key [2] registration display
If the registered number being displayed exceeds the available display screen, pressing the [#] key
advances the display to the next digit screen, and pressing the [ ] key returns the display to the
previous digit screen.
Step 4. Shift the [REGISTER] switch back to the OFF position. The station will be placed in standby mode.
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8.7. Redial
By one-touch pressing the master station's [REDIAL]
key, the last dialed number will be dialed again.
9
2
Call
REDIAL
No. 92
9. SPECIFICATIONS
Power Source
Current Consumption
Talk System
24 V DC (supplied from the main frame)
60 mA
Duplex or semi-duplex conversation
300 – 3,400 Hz
Talk Frequency
Handset Microphone/Speaker
Handsfree Microphone
Station Speaker
Dynamic type, 150 Ω
Electret condenser microphone
Dynamic type, 8 Ω, ø57 mm, 0.6 W
Membrane switch
Key Pad
Display
12 digits LCD
Auto dialing Key
Station Speaker Volume Control
8 keys
2-step selection slide switch
Handset Speaker Volume Control Volume, 0 to +12 dB
Installation Method
Wiring
Connection Terminal
Desk-/wall-mountable
Twisted pair cables/2-pair
Line output:
6-position 4-contact modular jack
External speaker output: 2-pin screw terminal (8 Ω, 0.6 W)
Operating Temperature
Finish
Dimensions
Weight
0 – 40°C
ABS resin, pale white
216 (w) x 74.5 (h) x 213 (d) mm
940 g
Note: The design and specifications are subject to change without notice for improvement.
• Accessories
Wall mounting bracket ................................ 1
Connection cord (3 m) ................................ 1
Wood screw ............................................... 2
Printed in Japan
133-06-236-80
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