Hi,
I've been trying to get SS7 working with asterisk the last couple of
days, but had on luck.
My configuration:
- server with a Digium TE420 card, another server with a Digium TE120
card crossover cable between
- libss7-1.0.2
- dahdi-2.1.0.4
- asterisk-1.6.1.1
The connection between the two servers is working fine. I have set up a
test pri_cpe/pri_net signalling and was able to do a SIP->DAHDI->SIP call.
/etc/dahdi/system.conf (both machines):
span=1,1,0,ccs,hdb3,crc4
bchan=1-15,17-31
mtp2=16
chocanceller=mg2,1-15,17-31
/etc/asterisk/chan_dahdi.conf (server1)
context=from-ss7
signalling = ss7
ss7type = itu
linkset = 1
pointcode = 20
adjpointcode = 25
defaultdpc = 25
ss7_called_nai=dynamic
ss7_calling_nai=dynamic
networkindicator=international
cicbeginswith = 1
channel = 1-15
cicbeginswith = 17
channel = 17-31
sigchan = 16
/etc/asterisk/chan_dahdi.conf (server2)
pointcode = 25
adjpointcode = 20
defaultdpc = 20
[otherwise same as server1's config]
After starting up both server, SS7 comes up successfully:
MTP2 link up (SLC 0)
--- SS7 Up ---
Resetting CICs 1 to 15
Resetting CICs 17 to 31
Got reset acknowledgement from CIC 1 to 15.
Got reset acknowledgement from CIC 17 to 31.
Here's my call scenario:
SIP/600 (Grandstream phone) -> server 1 -> SS7 -> server 2 -> SIP/555
(Nokia E71)
Output from server 1:
== Using SIP RTP CoS mark 5
-- Executing [1000 at default:1] Dial("SIP/600-08887770",
"DAHDI/g1/1000,55,tTo") in new stack
-- Called g1/1000
-- DAHDI/1-1 is proceeding passing it to SIP/600-08887770
-- DAHDI/1-1 is ringing
-- DAHDI/1-1 answered SIP/600-08887770
Output from server 2:
-- Executing [1000 at from-ss7:1] Ringing("DAHDI/1-1", "") in new stack
-- Accepting call to '1000' on CIC 1
-- Executing [1000 at from-ss7:2] Dial("DAHDI/1-1", "SIP/555,50,tTo")
in new stack
== Using SIP RTP CoS mark 5
-- Called 555
-- SIP/555-0890bab0 is ringing
-- SIP/555-0890bab0 answered DAHDI/1-1
So the call is set up properly. BUT there's no audio on either end!!!
With dahdi_monitor I can see activity on both card's first channel (and
no other channels, so there's no CIC mismatch), but on server1 I only
have RX and on server2 I only have TX.
Could anybody give me a hint where my problem could lie?
Cheers,
Zoltan
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