[asterisk-ss7] FCS/HDLC errors

[Charl Barnard]

Hi all,
Running a very recent version of asterisk and libss7, things seem mostly OK,
being able to place and receive calls, but with many of the following errors
logged:

[Oct 30 07:40:10] ERROR[9194] chan_zap.c: !! Unable to handle SIG_NET_MNG
messag
e with H1 = 1 and H0 = 4
[Oct 30 07:40:10] ERROR[9194] chan_zap.c: Received error from mtp3 layer: -1
[Oct 30 07:40:29] ERROR[9195] chan_zap.c: Bad FCS!
[Oct 30 07:40:34] ERROR[9194] chan_zap.c: !! Unable to handle SIG_NET_MNG
messag
e with H1 = 1 and H0 = 4
[Oct 30 07:40:34] ERROR[9194] chan_zap.c: Received error from mtp3 layer: -1
[Oct 30 07:40:52] ERROR[9194] chan_zap.c: HDLC Abort!
[Oct 30 07:42:22] ERROR[9194] chan_zap.c: HDLC Abort!
[Oct 30 07:42:36] ERROR[9195] chan_zap.c: !! Unable to handle SIG_NET_MNG
messag
e with H1 = 1 and H0 = 4
[Oct 30 07:42:36] ERROR[9195] chan_zap.c: Received error from mtp3 layer: -1
[Oct 30 07:42:45] ERROR[9194] chan_zap.c: HDLC Abort!
[Oct 30 07:42:45] ERROR[9194] chan_zap.c: HDLC Abort!
[Oct 30 07:43:08] ERROR[9195] chan_zap.c: Bad FCS!
[Oct 30 07:43:53] ERROR[9194] chan_zap.c: HDLC Abort!
[Oct 30 07:44:16] ERROR[9194] chan_zap.c: Error in write Unknown error
500[Oct 3
0 07:44:16] ERROR[9194] chan_zap.c: HDLC Abort!
[Oct 30 07:44:16] ERROR[9195] chan_zap.c: Bad FCS!
[Oct 30 07:44:16] ERROR[9195] chan_zap.c: Bad FCS!
[Oct 30 07:44:16] ERROR[9194] chan_zap.c: HDLC Abort!
[Oct 30 07:44:16] ERROR[9195] chan_zap.c: Error in write Unknown error
500[Oct 3
0 07:44:16] ERROR[9195] chan_zap.c: Bad FCS!

Any ideas of what may be causing this?

Thanks,
Charl