JOBAID
®
TOTAL ACCESS 1000 239 HRE
61179513L1-22A
0212
LOOPBACK AND CONTROL CODES
LED STATUS
239 HRE
FUNCTION
CODE
RESPONSE
ICOT and HRE(s) will arm and the HLIU will loop up toward the network.
CLEI: VAR1FC0B_ _
NETWORK
ARM (in-band)
11000 (binary)
LP1 / LP2
G OFF
No synchronization with the ICOT.
ARM (ESF Data Link)
FF48 (hex) or 1111 1111
0100 1000 (binary) sent ICOT and HRE(s) will arm and the HLIU will loop up toward the network.
in the Facility Data Link
G GREEN
G YELLOW
G RED
Synchronized with good signal quality on NET Loop 1/Loop 2
(> 2 dB margin).
Disarm (in-band)
11100 (binary)
All units are removed from the armed state and loopbacks will be released.
Synchronized with marginal signal quality on NET Loop 1/Loop 2
(1 to 2 dB margin).
Disarm (ESF Data Link) FF24 (hex) or 1111 1111
0010 0100 (binary) sent in All units are removed from the armed state and loopbacks will be released.
the Facility Data Link
Synchronized with poor signal quality on NET Loop 1/Loop 2
(0 dB margin).
1
Activation ICOT
D3D3 (hex) or
1101 0011 1101 0011
(binary)
If received while in an armed state, the ICOT will loop toward the network.
CUSTOMER
LP1 / LP2
G OFF
G GREEN
No synchronization with the RT.
Loop down w/out
9393 (hex) or
Automatically releases without disarming any ICOT and HRE that may be in
1001 0011 1001 0011 (binary) loopback toward the network.
Synchronized with good signal quality on CUST Loop 1/Loop 2
(> 2 dB margin).
2
disarming
1
HRE Network Loop up
C741
If an HRE is present and units armed, the HRE will loop up toward network..
(1100 0111 0100 0001)
G YELLOW
G RED
Synchronized with marginal signal quality on CUST Loop 1/Loop 2
(1 to 2 dB margin).
1
HLIU Loop up
C742
If received while in an armed state, the HLIU will loop toward the network..
(1100 0111 0100 0010)
Synchronized with poor signal quality on CUST Loop 1/Loop 2
(0 dB margin).
1 Units must be armed with 11000b or FF48h before this code will work.
2 In order to behave like an NIU, the HLIU will not loop down from the network side with 9393h.
NOTE: All codes listed above must be sent for a minimum of 5 seconds in order for them to be detected and acted upon.
LL / RL
G OFF
G YELLOW
G GREEN
No active arming or loopback is detected at the HRE.
Indicates LB from HRE toward the network is active.
Indicates LB from HRE toward the customer is active.
Card Edge Pin Assignment
Pin
1
2
3
4
5
6
7
8
Designation
Description
Ground
No Connect
HDSL LOOP SPECIFICATIONS FOR OPTIMUM OPERATION
GND
NC
T1
R1
T1
R1
NC
T
G Cable pairs must be nonloaded
Customer Loop 1 Tip
Customer Loop 1 Ring
Network Loop 1 Tip
Network Loop 1 Ring
No Connect
Network Loop 2 Tip
Network Loop 2 Ring
Ground
G No single Bridged Tap > 2 kft
G Maximum loop resistance is 800 Ω
G Pulse attenuation (LOSS on HDSL Current System Status screen) < 30 dB
G Impulse noise < 50 dBrn as measured using a 50 kb filter
G Total Bridged Tap < 2.5 kft
9
R
GND
T
G 196 KHz insertion loss < 35 dB
10
11
12
G Signal quality of 6 dB or higher, with no fluctuation and equal on both loops
G Wideband Noise < 31 dBrn as measured using a 50 kb filter
G Internal Clock Accuracy +25 ppm (exceeds Stratum 4)
Customer Loop 2 Tip
Customer Loop 2 Ring
R
C A U T I O N !
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
GGGFor a complete Installation and Maintenance Practice (P/N 61179513L1-5): (877) 457-5007, Faxback Document 900. Please have your fax number ready. G
HANDLING PRECAUTIONS REQUIRED.
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