ADTRAN TSU 120e - Manual (Page 126)

Appendix D. System Messages
D-2 TSU 120 User Manual 61202129L1-1
DSX-1 (PBX) Interface
The following messages indicate a condition on the Base DSX-1
(PBX) interface:
Status Messages
Network Interface (NI)
TR-08 alarm messages appearing in the alarm or history
log have been received from the far end. If the NI detects
one of the aove conditions, it will send the appropriate
alarm (if enabled) to the far end but no message will ap-
pear in the alarm or history log.
Red Alarm Not able to frame data coming to the DSX-1
interface; sometimes referred to as out-of-
frame (OOF)
Yellow Alarm Remote alarm indicator (RAI) being
received by the DSX-1 interface
Blue Alarm Receiving unframed all 1s at the DSX-1
interface [alarm indicator signal (AIS)]
Loss of Signal No signal detected by the DSX-1 interface
Payload On Payload loopback activated
Line On Loopback off
Loopback Off All loopbacks deactivated
Factory Restore Factory setting restored
Power On Unit powered on
Self-Test Internal self-test performed
TR-08 DL Down* TR-08 data link is down
TR-08 DL Up* TR-08 data link is up
Minor Alarm* Loss of sync, carrier los, BPV threshold
exceded, or data link failure
Major Alarm* Conditions for a minor alarm have contin-
ued for greater than 2.5 seconds