PRI got event: Alarm (4) on Primary D-channel of span 1


#1

I am having a daily issue of dropping calls. Here are a few of the logs I get.
Jan 18 12:07:52 NOTICE[11241] chan_zap.c: PRI got event: Alarm (4) on Primary D-channel of span 1

Jan 18 12:07:52 WARNING[11241] chan_zap.c: No D-channels available! Using Primary channel 24 as D-channel anyway
Jan 13 11:09:40 NOTICE[14732] chan_zap.c: PRI got event: HDLC Bad FCS (8) on Primary D-channel of span 1

Jan 13 11:09:40 NOTICE[14732] chan_zap.c: PRI got event: HDLC Bad FCS (8) on Primary D-channel of span 1

Jan 13 11:09:40 NOTICE[14732] chan_zap.c: PRI got event: Alarm (4) on Primary D-channel of span 1

Jan 13 11:09:40 WARNING[14732] chan_zap.c: No D-channels available! Using Primary channel 24 as D-channel anyway!

Jan 13 11:09:45 NOTICE[12731] app_dial.c: Unable to create channel of type ‘Zap’ (cause 34 - Circuit/channel congestion)
Right now we are pointing at the telco and they are pointing back. Telco said that they never see the circuit drop or an OOS on their PRI port?
any thoughts, here is how the PRI is setup.

current revision is 8152
For the card…

span=1,1,3,esf,b8zs,yellow ß First T1 ClockSource.

bchan=1-23

dchan=24

for the switch…

language=en

context=incoming

immediate=no

group=1

faxdetect=both

switchtype=national

signalling = pri_cpe

channel => 1-23

span=2,0,1,esf,b8zs ß 2nd T1 Slave and external time source basically this equipment is providing the timing for that T1

fxoks=25-47

span=3,0,0,esf,b8zs,yellow ß Pri

bchan=49-71

dchan=72

span=4,0,0,esf,b8zs,yellow ß NOP … is not use.

bchan=73-95

dchan=96

Now these are my possible settings for the LBO. I can increase the voltage but I don’t see any different.

0: 0 db (CSU) / 0-133 feet (DSX-1)

1: 133-266 feet (DSX-1)

2: 266-399 feet (DSX-1)

3: 399-533 feet (DSX-1)

4: 533-655 feet (DSX-1)

5: -7.5db (CSU)

6: -15db (CSU)

7: -22.5db (CSU)

any thoughts? any info is very much appreciated.