Cisco Systems IPMUX-1E operation manual Frequently Asked Questions, Answer

IPmux-1/1EInstallation and Operation Manual Chapter 4 Troubleshooting and Diagnostics

4.5 Frequently Asked Questions

Question: How does the IPmux handle/propagate alarms on the TDM and

Ethernet side?

Answer

The IPmux handles alarms on the TDM and Ethernet side in the following manner:

TDM Side Alarms:

Unframed mode:

1.In case of LOS (Loss Of Signal) on the local IPmux side, AIS will be sent towards the IP side, and will then be transferred over the E1/T1 to the remote TDM device.

2.All other alarms sent from the near-end TDM device (including information on timeslot 0), will be propagated transparently by the local IPmux, to the remote end TDM device (over the IP connection).

Framed mode:

In case of LOS/LOF/AIS detected on the local IPmux side, a user-configurable conditioning pattern (00 to FF) will be sent on the relevant time slots (over the IP connection), to the far-end TDM device. A user-configurable conditioning pattern can also be applied on the ABCD bits (CAS signaling 1 to F) going towards the remote PBX.

The frame synch on the E1/T1 level is maintained in favor of the end TDM devices.

Ethernet Side Alarms:

Unframed mode:

In case of local failure on the IPmux, or a situation of jitter buffer underflow/overflow, an (unframed) AIS will be sent towards the near-end TDM side

Framed mode:

In case of local failure on the IPmux, or situation of jitter buffer underflow/overflow, a conditioning pattern (00 to FF) will be sent towards the near-end TDM device on the time slots related to that specific bundle. A user- configurable conditioning pattern can also be applied on the ABCD bits (CAS signaling 1 to F), going towards the local TDM device.

In this case the synch on the E1/T1 level is maintained in favor of the TDM end devices.

Frequently Asked Questions 4-27