Problems With Bri Service; The Bri Card Is Connected To The Isdn Network (U Loop) But The Led For One Of More Loops Is Not Lit; Solution - Nortel Modular ICS 6.0 Installer's Manual

570 / Problems with BRI service

Problems with BRI service
Each LED on front of a BRI-ST or BRI-U Card corresponds
with a loop, or indicates an overall state of the BRI
connections.
BRI Card indicators
LED status
on
off
all flashing
bottom LED only flashing
The BRI card is connected to the ISDN network (U loop)
but the LED for one of more loops is not lit
Possible problem
The physical connection or configuration for the network
connection is not correct (no Layer 1).

Solution

1. Verify the wiring from the network to the distribution
block.
2. Verify the wiring from the distribution block to the ICS.
3. Use a Meridian 2500 set to test for data on the BRI trunk.
4. Test the network connection by connecting Bellcore
standard terminal equipment (TE) directly to the network.
Modular ICS 6.0 Installer Guide
S, T or U-NT loop
normal operation
no synchronization
with ISDN network
Card is not recognized by ICS (not configured in
Hardware as a valid BRI loop). All the LEDs on
a BRI Card are flashing on page 571.
ICS is downloading firmware to the card; card is
new or has changed location, or Feature
Cartridge has been upgraded
S or U-LT loop
no synchronization
with TE
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