Strange messages in logs: PRI got event: HDLC Bad FCS

Asterisk Asterisk Support
1

Hello, everyone. About a month I started to get these messages in the logs. I didn’t pay attantion first, but recently I started to get red alarms in the span2. Can anyone tell me what do those messages mean (is there a problem in the line. Or it is my configuration).

Oct 11 13:35:45 NOTICE[5834]: chan_zap.c:8194 pri_dchannel: PRI got event: HDLC Bad FCS (8) on Primary D-channel of span 2
Oct 11 13:35:46 NOTICE[5834]: chan_zap.c:8194 pri_dchannel: PRI got event: HDLC Bad FCS (8) on Primary D-channel of span 2

asterisk 1.2.12.1. zaptel-1.2.9.1. This is my zaptel.conf
span=1,1,0,ccs,hdb3,crc4
span=2,2,0,ccs,hdb3,crc4
span=3,0,0,ccs,hdb3,crc4
span=4,0,0,ccs,hdb3,crc4
bchan=1-15
dchan=16
bchan=17-31
bchan=32-46
dchan=47
bchan=48-62
bchan=63-77
dchan=78
bchan=79-93
bchan=94-108
dchan=109
bchan=110-124
loadzone=es
defaultzone=es

Thanks in advance.

2

check your zapata.conf for resetinterval=never - if it’s not there, add it.

past that, are all four of your lines connecting to your telco, or are two “external” and two “internal”???

3

Id say that just a bad packet passed through on the line, notifying you of an errror. Layer 2 error detection, not correction.