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Registered 7 years 114 days

YaRbXNWnWVKKTJq Monday, 10 September 2018, 04:46 PM

Broken Sdp part

Good evening guys.

I have following setup :

NAT router -> SBC Innovaphone -> PBX Innovaphone .

Phone 993 registred from internet over SBC to PBX .

Phone 997 registred by sip from LAN to PBX directly.

PBX configured - no media relay.

SBC configured - media relay for Session Border object.

Call from 993 to 997

Leg from 993 to SBC

SIP + SDP all fine

Leg from PBX to 997 have following (look like sdp broken):

INVITE sip:997@10.111.111.133:2074;line=wf2tzcx3 SIP/2.0
Via: SIP/2.0/UDP 10.111.117.3:5060;branch=z9hG4bK-75CADA7B;rport
From: "Test" <sip:993@pbx.test.net;user=phone>;tag=51459703
To: <sip:997@pbx.test.net;user=phone>
Call-ID: 9dbb5e1338965b01d410000129988901@B0C
CSeq: 1987226120 INVITE
Contact: <sip:993@10.111.117.3:5060;user=phone;transport=UDP>
Alert-Info: <urn:alert:source:internal>
Allow: REGISTER,SUBSCRIBE,NOTIFY,INVITE,ACK,PRACK,OPTIONS,BYE,CANCEL,REFER,INFO,UPDATE,PUBLISH
Content-Length: 931
Content-Type: application/sdp
Max-Forwards: 61
Supported: 100rel,replaces,privacy,timer,from-change,histinfo,tdialog,answermode,uui
User-Agent: (innovaphone Virtual Appliance/12r2 sr13 [12.5410/1000/0])
P-Asserted-Identity: "Test" <sip:993@pbx.test.net;user=phone>
Recv-Info: dtmf
P-Sig-Options: Sending-Complete,bc=039090a3

v=0
o=- 2828 1 IN IP4 10.11

Any idea what to do ?

Moderator

Registered 13 years 282 days

Gerrit Beuko (innovaphone) Tuesday, 11 September 2018, 12:25 PM

1 of 1 users consider this post helpful

Re: Broken Sdp part

Hello,

seems to be an problem with the packet sniffer?

Content-Length: 931

So there must be more information's in the SDP.

We need the hole pcap to say more about this behavior.

Gerrit

Registered 7 years 114 days

YaRbXNWnWVKKTJq Tuesday, 11 September 2018, 01:40 PM

Re: Broken Sdp part

Hi. Thanks for answer. It is quite easy to recreate with this codec list to SBC.

Btw Is any way to disable SBC forced conversion from SIP to H323 ?

a=rtpmap:8 PCMA/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:3 GSM/8000
a=rtpmap:99 G726-32/8000
a=rtpmap:112 AAL2-G726-32/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:101 telephone-event/8000

After i removed all codecs except PCMA and PCMU. Problem gone. If i return them back problem appear again. I ll try to investigate little bit more and return.

Registered 7 years 114 days

YaRbXNWnWVKKTJq Thursday, 13 September 2018, 12:12 PM in response to Gerrit Beuko (innovaphone)

Re: Broken Sdp part

Look like that problem exist in all versions including 12r2 sr17 IPVA[12.5471], Bootcode[1000], Hardware[0] .

I still think that SBC for SIP broken . It cut off SDP parts of messages. Can you please tell me what kind of debugs i can provide to fix this issue ?

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