[cisco-voip] CCM3.3 - MGCP - Q.Sig

[Voll, Scott]

You will need to check to see what version of Qsig your PBX uses.  I
can't recall the two different versions (maybe iso and something else)
one version was not supported by MGCP and was by H.323.  You might be
running into this problem.

 

What PBX are you running?  

 

Scott

 

________________________________

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Martin Lohnert
Sent: Tuesday, January 03, 2006 12:39 AM
To: cisco-voip at puck-nether.net
Subject: [cisco-voip] CCM3.3 - MGCP - Q.Sig

 

Hey everyone,

another one of these 'things' that aren't making any sense to me: a
customer using C2651XM with an ISDN PRI to their legacy PBX, running
Q.sig and the router as a h.323 gateway without problems. Recently a
decision has been made to implement calling name transfers on this line
and thus switch to MGCP. From my point of view, nothing needs to be
changed on the PBX, as they're using Q.sig already.

 

Now, after switching to MGCP, all calls fail, since we drop them with
"Cause i = 0x80D1 - Invalid call reference value." Q.931 translator
shows:

=============================
12/23/2005 11:43:21.737 CCM
RX <- SEGMENT pd = 8  callref = 0x000C
Segmented Message i = 0x0105
Bearer Capability i =
0x2A8003313030020302676480033130300203026765A00980010181010182010AA10980
010181010182010A1C1D9FAA06 
RESERVED = 00x80
IE out of order or end of private IEs --
UNRECOGNIZED VARIABLE: 0x01 i = 
RESERVED = 20x82
UNRECOGNIZED VARIABLE: 0x01 i = 
RESERVED = 110x8B
UNRECOGNIZED VARIABLE: 0x01 i = 
Sending Complete 
UNRECOGNIZED VARIABLE (0x0F) i = 0x02D8
IE 0xC0
IE out of order or end of private IEs --
UNRECOGNIZED VARIABLE (0x02) i = 0x55
UNRECOGNIZED VARIABLE (0x30) i = 0x820406400840
IE out of order or end of private IEs -- 
Facility i =
0x9FAA068001008201008B0102A1300202D8D006082B0C02885302010D3020801E090A02
000202020202020101010101010103020101010000000000000000
Facility i = 0x9FAA068001008201008B0100A1090202D8E00201008400
Facility i = 0x9FAA068001008201018B0100A1340202D8F006082B0C0288 
     Decode Error: IE Length Error (0x42)
=============================
12/23/2005 11:43:21.737 CCM
TX -> RELEASE_COMP pd = 8  callref = 0x800C
Cause i = 0x80D1 - Invalid call reference value 
============================= 

 

If I understand this correctly, CCM doesn't recognize the incoming SETUP
correctly? We're running CCM 3.3.3sr2 and 12.3.4T2 on the gateway.We had
to switch back to h.323 and everything works fine again... How do we
make CCM understand this scenario? Upgrade CCM/IOS ? 

 

Cheers & Happy 2006.

ML

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