MTP Link Down SLC (0) SLC (1)

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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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