[SIPForum-discussion] unnecessary 183 session progress

[Sam]

Hi,

This one is know behavior with some of the SBC that for 2-3 ms they
send 183 false ring,
on your gateway you can block the 183 without sdp , i guess that will
work for you .

This is not standard behavior !

Regds
Sam

On 3/7/12, siddharth sharma <sid77sharma77 at gmail.com> wrote:
> Hi All,
>
> I have one situation here.
> This is my call flow scenario is as below.
>
> UA1 -----> SBC -----> SS -----> MGW ----> Operator 1
>
> When, Operator 1 is dialing less numbers, Softswitch is not responding "484
> Address incomplete" directly, but first it sends 183 session
> progress(without SDP) and then it sends "484 Address Incomplete"
>
> Is this correct behaviour according to standard? Should not this calls have
> been rejected directly?
>
> I am attaching messages between SBC and SS. Please reply.
>
> ----------------------------------------------------------------------------------------------------------------------
> Sequence NO.:1
> Module:52
> Time:2012-03-02  16:18:30.00
> Direction:RECEIVE
> SOURCE IP:172.16.17.6
> SOURCE PORT:5060
> TARGET IP:172.16.31.58
> TARGET PORT:5060
> MESSAGE TYPE:INVITE
> Data:INVITE sip:91730917032 at 172.16.31.58:5060 SIP/2.0
> Via: SIP/2.0/UDP 172.16.17.6:5060;branch=z9hG4bK1d2e5820e8d1qigmm091.1
> To: <sip:91730917032 at 114.79.248.6>
> From: "105163" <sip:12127773456 at 114.79.248.6>;tag=154761817rdb21517
> Call-ID: 78234899-0-2542362390 at 204.15.169.141
> CSeq: 1 INVITE
> Contact: <sip:105163 at 172.16.17.6:5060;transport=udp>
> Supported: timer
> Session-Expires: 1800;refresher=uas
> Min-SE: 90
> Max-Forwards: 68
> Content-Type: application/sdp
> Content-Length: 285
>
> v=0
> o=VSXi 188 1 IN IP4 172.16.17.6
> s=Session Controller
> c=IN IP4 172.16.17.6
> t=0 0
> m=audio 50736 RTP/AVP 18 5 101
> a=rtpmap:18 G729/8000
> a=fmtp:18 annexb=no
> a=rtpmap:101 telephone-event/8000
> a=fmtp:101 0-15
> a=alt:1 1 : A32FC030 000000CF 192.168.14.3 9332
> a=sendrecv
>
> ----------------------------------------------------------------------------------------------------------------------
> Sequence NO.:2
> Module:52
> Time:2012-03-02  16:18:30.00
> Direction:SENDER
> SOURCE IP:172.16.31.58
> SOURCE PORT:5060
> TARGET IP:172.16.17.6
> TARGET PORT:5060
> MESSAGE TYPE:1xx
> Data:SIP/2.0 100 Trying
> Via: SIP/2.0/UDP 172.16.17.6:5060;branch=z9hG4bK1d2e5820e8d1qigmm091.1
> To: <sip:91730917032 at 114.79.248.6>
> From: "105163"<sip:12127773456 at 114.79.248.6>;tag=154761817rdb21517
> Call-ID: 78234899-0-2542362390 at 204.15.169.141
> CSeq: 1 INVITE
> Content-Length: 0
>
>
> ----------------------------------------------------------------------------------------------------------------------
> Sequence NO.:3
> Module:52
> Time:2012-03-02  16:18:30.00
> Direction:SENDER
> SOURCE IP:172.16.31.58
> SOURCE PORT:5060
> TARGET IP:172.16.17.6
> TARGET PORT:5060
> MESSAGE TYPE:1xx
> Data:SIP/2.0 183 Session Progress
> Via: SIP/2.0/UDP 172.16.17.6:5060;branch=z9hG4bK1d2e5820e8d1qigmm091.1
> To: <sip:91730917032 at 114.79.248.6>;tag=ac101f3a-19336
> From: "105163"<sip:12127773456 at 114.79.248.6>;tag=154761817rdb21517
> Call-ID: 78234899-0-2542362390 at 204.15.169.141
> CSeq: 1 INVITE
> Contact: <sip:91730917032 at 172.16.31.58:5060>
> Allow: INVITE,ACK,OPTIONS,BYE,CANCEL,INFO,REFER,NOTIFY,PRACK,UPDATE
> Record-Route: <sip:172.16.31.58:5060;lr>
> User-Agent: Softswitch/1.0.0
> Content-Length: 0
>
>
> ----------------------------------------------------------------------------------------------------------------------
> Sequence NO.:4
> Module:52
> Time:2012-03-02  16:18:31.00
> Direction:SENDER
> SOURCE IP:172.16.31.58
> SOURCE PORT:5060
> TARGET IP:172.16.17.6
> TARGET PORT:5060
> MESSAGE TYPE:4xx
> Data:SIP/2.0 484 Address Incomplete
> Via: SIP/2.0/UDP 172.16.17.6:5060;branch=z9hG4bK1d2e5820e8d1qigmm091.1
> To: <sip:91730917032 at 114.79.248.6>;tag=ac101f3a-19336
> From: "105163"<sip:12127773456 at 114.79.248.6>;tag=154761817rdb21517
> Call-ID: 78234899-0-2542362390 at 204.15.169.141
> CSeq: 1 INVITE
> User-Agent: Softswitch/1.0.0
> Content-Length: 0
>
>
> ----------------------------------------------------------------------------------------------------------------------
> Sequence NO.:5
> Module:52
> Time:2012-03-02  16:18:31.00
> Direction:RECEIVE
> SOURCE IP:172.16.17.6
> SOURCE PORT:5060
> TARGET IP:172.16.31.58
> TARGET PORT:5060
> MESSAGE TYPE:ACK
> Data:ACK sip:91730917032 at 172.16.31.58:5060 SIP/2.0
> Via: SIP/2.0/UDP 172.16.17.6:5060;branch=z9hG4bK1d2e5820e8d1qigmm091.1
> CSeq: 1 ACK
> To: <sip:91730917032 at 114.79.248.6>;tag=ac101f3a-19336
> From: "105163" <sip:12127773456 at 114.79.248.6>;tag=154761817rdb21517
> Call-ID: 78234899-0-2542362390 at 204.15.169.141
> Max-Forwards: 68
> Content-Length: 0
>