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JOBAID
61212082L1-22C
0101
TR ISDN
CLEI: DDRPLRC1_ _
STATUS LEDs
OFFICE I/F ● RED Indicates a loss of signal from or synchronization
with the 2B1Q BRI interface toward the switch
✷ FLASHING Once per second indicates receipt of a Near End
Block Error from the 2B1Q BRI interface toward
the switch
TRI I/F ● RED Indicates a loss of signal from or synchronization
with the TRI-R (Total Reach ISDN Remote) unit
✷ FLASHING Once per second indicates receipt of a Near End
Block Error from the TRI-R unit
TEST ● YELLOW Indicates the TRI-C unit is in a network
commanded 2B+D loopback
✷ FLASHING Indicates that the TRI-C is in a network commanded
loopback or that a downstream unit has been placed
in loopback from the faceplate of the TRI-C. Once
per second for B1 loopback, twice per second for B2
loopback
ACT ● GREEN Indicates the terminal equipment has exchanged
ACT bits with the ISDN switch
✷ FLASHING Once per second indicates that the ACT bit is being
sent from only the terminal equipment (CPE)
MFT ADAPTER WIRING (where approved)
T400 MFT SIDE
TIP TRI-C pin 55 pin 14 TIP 1 side B
RING TRI-C pin 49 pin 13 RING 1 side B
TIP CO pin 41 pin 17 TIP side A
RING CO pin 47 pin 19 RING side A
–48 (supply) pin 35 pin 11 –48 V
–48 (return) pin 17 pin 18 Ground
Frame GND pin 11 pin 1 Chassis Ground
Frame GND pin 27
T400 EDGE CONNECTOR PIN ASSIGNMENTS
55 TIP, TR-Interface To Customer
49 RING, TR-Interface To Customer
47 RING, U-Interface From ISDN Switch
41 TIP, U-Interface From ISDN Switch
35 –VDC Supply
27 Frame Ground
17 –VDC Return
11 Frame Ground
Note: ISDN connections are not sensitive to TIP/RING reversals.
OPTIONS
S1-1 CTONE
■ ON Enables continuous periodic wake-up tones to the ISDN switch or LULT device.
Wake-up tones are repeated at 17-second intervals.
■ OFF Default and normal condition, in that the TRI-C sends one wake-up tone on power-up
only.
S1-2 TEST
■ ON Used for factory test only.
■ OFF Default and normal mode.
LOOPBACK TEST (ADR1 – ADR4, NT1)
Loopbacks in the network to customer direction can be initiated from either the ISDN
switch (e.o.c.) or from the faceplate of the TRI-C. Loopbacks initiated from the faceplate are
non-intrusive to the other B and D channels. To initiate a loopback, perform the
following steps:
1. Connect the DS0 digital test set (e.g., TPI 108/109) to the 8-pin RJ-45 jack of the TRI-C
and configure the set for Near Logic and 64 kb/s.
2. Rotate the 8-position rotary switch clockwise or counterclockwise for B1 or B2
selection respectively, to the desired address.
3. The TEST LED will illuminate if the loopback is successful and will not illuminate
if the loopback fails.
4. Send and receive 2047 pseudo-random data to the established loopback and observe the
DS0 digital test set bit error count.
5. It is not necessary to exit the test mode to select additional addresses or to change the B1/B2
channel (CW, CCW).
6. To terminate the loopback, remove the 8-pin modular ring and return the rotary switch to the
unused position (between OFC TX and ADR4).
Note: The rotary switch is only intrusive if a DS0 test set is connected to the 8-pin modular interface of the
TRI-C. If a test set is not connected, the rotary switch does not function. The 8-pin connector should be male
with all 8 pins straight-through (no crossovers).
COMPATIBILITY
TOTAL REACH
®
ISDN
2ND GENERATION CENTRAL OFFICE UNIT
REMOTE
UNIT
CENTRAL
OFFICE UNIT
DDRPLKC1AA
DDRPMLC1AA
NANIDCBCAA (NID)
1212083L1
1st Generation
TRI-R
1st Generation
TRI-C
DDRPLRC1AA
DDRPMLP1AA
NDMMFHO1RA (NID)
1212083L1
2nd Generation
TRI-R
2nd Generation
TRI-C
1212082L1
–190 VDC
–190 VDC
–130 VDC
C A U T I O N
C A U T I O N
!
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.