Avaya DEFINITY Server CSI Maintenance Manual page 1798

Maintenance Objects
Red Alarm Inquiry Test (#140)
A UDS1 Interface circuit pack raises a Red alarm when the framing pattern of the
incoming DS1 bit stream has been lost. The Red Alarm Inquiry Test checks the
framing status of a UDS1 Interface circuit pack. A UDS1 Interface circuit pack
takes 3 seconds to recognize and report a Red alarm and 10 seconds to
recognize and report the resolution of a Red alarm.
When the UDS1 Interface circuit pack detects a Red alarm, the circuit pack
transmits a Yellow alarm to the remote DS1 endpoint and sends a RED ALARM
message to the maintenance software. After the Red alarm is confirmed, the
maintenance software places all trunks or ports of the circuit pack into the
out-of-service state. The inquiry test runs every 10 minutes until the Red alarm is
cleared.
When the Red alarm is cleared, the UDS1 Interface circuit pack stops transmitting
the Yellow alarm to the remote DS1 endpoint. The maintenance software restores
all trunks or ports of the UDS1 Interface circuit pack to the service state before the
Red alarm occurs.
Loss of Multiframe Alarm
If the UDS1 Interface circuit pack is administered using DMI-BOS signaling, the
UDS1 Interface circuit pack raises a Loss of Multiframe Alarm (LMA) when it
cannot interpret the incoming signaling bits to synchronize to the multiframe
pattern received in the 24th channel. Once the UDS1 Interface circuit pack
detects an LMA, the circuit pack transmits a Remote Multiframe Alarm (RMA) to
the remote DS1 endpoint. Maintenance software handles both Red alarm and
LMA alarm(s) using the same mechanism.
1798
Issue 5 October 2002