Specifications

Chapter 4 Diagnostics and Troubleshooting IPmux-11 Installation and Operation Manual
4-18 Frequently Asked Questions
4.5 Alarm Relay
IPmux-11 supports dry contact alarm relay via dedicated pins of the RJ-45 EXT
CLK connector.
Table 4-6. Alarm Relay Pins of the EXT CLK Connector
Pin Function
6 Dry contact relay (normally shorted to pin 7
7 Dry contact relay (central pin)
8 Dry contact Relay (normally open, closed if ALARM active)
4.6 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:
• 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.
• 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