[asterisk-ss7] MTP Link Down SLC (0) SLC (1)

[Vashkar Chatterjee]

Checm if telco had crc enabled or not. If not turn off crc
On Feb 15, 2012 12:45 PM, "Bharat Lalcheta" <bharatlalcheta at gmail.com>
wrote:

> Hii,
>
> I have 2 servers with dual core 3 GHz dual cpu with 2 GB RAM and having 2
> * TE410P digium, total 8 port for inbound calling.
>
> using asterisk-1.6.2.9, dahdi-2.5, libss7 SVN latest version
>
> Both server has same setup, 8 E1's with 2 Signalling channels from same
> telco.
>
> follwoing is chan_dahdi.conf
>
> [channels]
> group=0
> linkset = 1
> signalling = ss7
> ss7type = itu
> ss7_called_nai=national
> ss7_calling_nai=national
> context=ivrs
> pointcode = 2
> adjpointcode = XXXXX
> defaultdpc = XXXXX
> networkindicator=national
> sigchan = 16
> cicbeginswith=1
> channel = 1-15
> cicbeginswith = 17
> channel = 17-31
> sigchan = 47
> cicbeginswith = 33
> channel = 32-46
> cicbeginswith = 49
> channel = 48-62
> cicbeginswith = 65
> channel = 63-93
> cicbeginswith = 97
> channel = 94-124
> cicbeginswith = 129
> channel = 125-155
> cicbeginswith = 161
> channel = 156-186
> cicbeginswith = 193
> channel = 187-217
> cicbeginswith = 225
> channel = 218-248
> following is the system.conf
>
> span=1,1,0,ccs,hdb3,crc4
> bchan=1-15,17-31
> mtp2=16
> span=2,2,0,ccs,hdb3,crc4
> bchan=32-46,48-62
> mtp2=47
> span=3,3,0,ccs,hdb3,crc4
> bchan=63-93
> span=4,4,0,ccs,hdb3,crc4
> bchan=94-124
> span=5,5,0,ccs,hdb3,crc4
> bchan=125-155
> span=6,6,0,ccs,hdb3,crc4
> bchan=156-186
> span=7,7,0,ccs,hdb3,crc4
> bchan=187-217
> span=8,8,0,ccs,hdb3,crc4
> bchan=218-248
> span=9,9,0,ccs,hdb3,crc4
> bchan=249-279
> span=10,10,0,ccs,hdb3,crc4
> bchan=280-310
> span=11,11,0,ccs,hdb3,crc4
> bchan=311-341
> span=12,12,0,ccs,hdb3,crc4
> bchan=342-372
> loadzone        = in
> defaultzone     = in
>
> Now one server working fine with 8 E1s in regular or heavy traffic of
> inbound.
>
> But in second server, its giving following warning at every 8-10 minutes
> [Feb 15 12:04:52] WARNING[13950] chan_dahdi.c: MTP2 link down (SLC 1)
> [Feb 15 12:04:52] WARNING[13950] chan_dahdi.c: MTP2 link down (SLC 0)
> Also when traffic is high, i.e. more than 220-230 calls, suddenly all
> calls get disconnected at same time. No other warning or error at that
> time, only above MTP2 link down message there. No flactuation in E1 media
> at my side or telco side.
>
> Please guide me to solve above problem.
>
>
> Bharat Lalcheta
>
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