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ACTIVE
Layer 2 Status:
TEI = 64, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
TEI = 66, SAPI = 1, State = MULTIPLE_FRAME_ESTABLISHED
Layer 3 Status:
0 Active Layer 3 calls
Activated dsl 0 CCBs = 0
Total Allocated ISDN CCBs = 0
While the Virtual Console simulator will stay up, some DMS implementations may shut down ISDN layer 1 or 2
if there are no active calls. With the actual switch, rather than the simulator, it may be necessary to dial out, or
arrange to receive a call, for the lower layers to activate.
In operation with the real switch, rather than the simulator, if you are operating in DMS mode and the switch is
implemented in this manner, you may need to congure the Cisco interface subcommand
“isdn tei-negotiation rst-call” This is most commonly seen in European switch implementations where the
switch initiates TEI negotiation as part of power-up handshaking.
Troubleshooting
Be systematic in your troubleshooting, from the environmental and then bottom-up from layer 1 upwards.
Environmental
Table 10: Symptoms and Recommended Actions
Power LED (2) does not light
Check power cabling, and the power supply. Verify
the outlet has power
Port LED (1 or 4) does not light
1. Check power LED. If it is OFF, check power
cabling, and the power supply
2. Check that the NT or TE are enabled
3. Check device cabling. Verify interface type.
3. Try the other port. If the other LED does not light,
contact technical support
Layer 1 Troubleshooting with Cisco routers
If the connected router fails to enter the ACTIVE state, as shown in Figure 13, you will need to troubleshoot.
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