Alcatel Carrier Internetworking Solutions Omni Switch/Router - Manual (Page 1004)

Viewing T1/E1 Configuration and Alarm Information
Page 33-16
Out of Frame Events . The total number of out of frames events that have been detected on this
port. An out of frame event occurs when three consecutive frame alignment signals have been
received with an error. The signal will be back in frame when frame alignment signalling is
normal for three consecutive frames.
Red Alarm Events . The number of times this port has been in a Red alarm state. A red alarm
occurs when a T1 port has been in Out-of-Frame ( OOF ) condition for 2.55 seconds. The red
alarm condition will be removed if the OOF condition has been absent for at least 16.6
seconds.
Squelch Alarm Events . The number of squelch alarm events that have been detected on this
port. A squelch alarm occurs when the line signal level of the input pulse is below a thresh-
old level.
Frame Bit Error Events . The number of framing bit error events that have been detected on this
port. A frame bit error occurs when an error bit is detected during the framing process.
Alarm Indication Signal Events . The number of Alarm Indication Signal ( AIS ) events that have
been detected on this port. An AIS occurs when an unframed signal with a high density of 1s
(99.9% density) is received for more than 1.5 seconds.
Out of Sub-multiframe Events . The number of sub-multiframe events that have been detected on
this E1 port. This error occurs when four (4) consecutive CRC-4 multiframe alignment signals
have been received in error or when a frame alignment error has been lost.
Out of TS16 Multiframe Events . The number of TS16 multiframe events that have been detected
on this E1 port. This error occurs when two (2) consecutive TS16 multiframe alignment signals
have been received in error, or all bits in time slot 16 are logic 0 for one TS16 multiframe, or
frame alignment has been lost.
Far End Frame Alarm Events . The number of times the remote end has detected an out-of-frame
condition. When a far end E1 port detects an out-of-frame condition, it transmits a frame with
the alarm indication bit set (in time slot 0) back to the local E1 port. This error is similar to a
yellow alarm on T1 ports.
Far End Multiframe Alarm Events . The number of times the remote end has detected an out-of-
multiframe condition. When a far-end E1 port detects an out-of-multiframe condition, it trans-
mits a frame with the alarm indication bit set (in time slot 16) back to the local E1 port. This
error is similar to a yellow alarm on T1 ports.
Far End Block Error Events . The number of times the remote end has received a frame with a
bad CRC-4 . When the far end E1 port detects a CRC-4 error in the incoming frame, it transmits
the frame with the E bit cleared.
CRC-4 Error Events . The number times a frame has been received with a bad CRC-4 .