Discussion:
Two Media Stream in One call
Nitin Kapoor
2009-12-10 13:10:45 UTC
Permalink
Hello All,

I am facing the issue with one of my customer where he is getting two media
streams in one call and they are using SBC(Nextone)

I checked the signaling traces and everything looks okay to me as well as
the RTP traces too.

As per the traces one RTP packet is going from 64.156.174.71 and the other
is coming from 8.15.244.11.

Could you please let me know is it possible where i can have the two media
streams in one call when this is the not the conference call. And if this is
possible then what is the scenario where its possible.

Please find the attached traces for the same.

Thanks,
Nitin Kapoor
General Telecom
Roni Even
2009-12-10 13:32:38 UTC
Permalink
Hi,

To know the answer you need to provide the SDP in the offer and answer.

If the offer/answer SDP defined two media streams, or N media streams this
is probably OK.

Roni Even



From: sip-***@ietf.org [mailto:sip-***@ietf.org] On Behalf Of Nitin
Kapoor
Sent: Thursday, December 10, 2009 3:11 PM
To: ***@ietf.org
Subject: [Sip] Two Media Stream in One call



Hello All,


I am facing the issue with one of my customer where he is getting two media
streams in one call and they are using SBC(Nextone)

I checked the signaling traces and everything looks okay to me as well as
the RTP traces too.

As per the traces one RTP packet is going from 64.156.174.71 and the other
is coming from 8.15.244.11.

Could you please let me know is it possible where i can have the two media
streams in one call when this is the not the conference call. And if this is
possible then what is the scenario where its possible.

Please find the attached traces for the same.

Thanks,
Nitin Kapoor
General Telecom
Christer Holmberg
2009-12-10 13:53:34 UTC
Permalink
Hi,

It is possible.

In theory this could be done with a single c- line, because SDP only talks about where media is to be sent - not where it comes from.

In reality, however, I assume this is a case where each m- line has its own c- line, each with a different IP address.

Regards,

Christer


-----Original Message-----
From: sip-***@ietf.org on behalf of Nitin Kapoor
Sent: Thu 12/10/2009 2:10 PM
To: ***@ietf.org
Subject: [Sip] Two Media Stream in One call

Hello All,

I am facing the issue with one of my customer where he is getting two media
streams in one call and they are using SBC(Nextone)

I checked the signaling traces and everything looks okay to me as well as
the RTP traces too.

As per the traces one RTP packet is going from 64.156.174.71 and the other
is coming from 8.15.244.11.

Could you please let me know is it possible where i can have the two media
streams in one call when this is the not the conference call. And if this is
possible then what is the scenario where its possible.

Please find the attached traces for the same.

Thanks,
Nitin Kapoor
General Telecom

_______________________________________________
Sip mailing list https://www.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
Use sip-***@cs.columbia.edu for questions on current sip
Use ***@ietf.org for new developments on the application of sip
Nitin Kapoor
2009-12-10 15:46:56 UTC
Permalink
Hello,
Below is the packet in UDP format, Could you please help me on this to
understand this scenario. Also attached is the complete traces.
Max-Forwards: 69
Session-Expires: 3600;refresher=uac
Supported: timer, 100rel
CSeq: 1 INVITE
Allow: INVITE, BYE, OPTIONS, CANCEL, ACK, REGISTER, NOTIFY, INFO, REFER,
SUBSCRIBE, PRACK, UPDATE
Via: SIP/2.0/UDP 8.15.244.10:5060
;branch=z9hG4bKf5de4d0e3c0860d122139e1e30a2995c
<sip:8.15.244.10>;method="NOTIFY;Event=telephone-event;Duration=1000"
Content-Type: application/sdp
Content-Length: 124
v=0
o=mscasheq01 547500705 547500705 IN IP4 8.15.244.10
s=sip call
c=IN IP4 8.15.244.11
t=0 0
m=audio 19612 RTP/AVP 0
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 8.15.244.10:5060
;branch=z9hG4bKf5de4d0e3c0860d122139e1e30a2995c
CSeq: 1 INVITE
Server: Sansay VSX 2.1
Content-Length: 0
SIP/2.0 180 Ringing
Via: SIP/2.0/UDP 8.15.244.10:5060
;branch=z9hG4bKf5de4d0e3c0860d122139e1e30a2995c
;tag=228209687-tdb1145808424
CSeq: 1 INVITE
Server: Sansay VSX 2.1
Content-Length: 0
SIP/2.0 200 OK
Via: SIP/2.0/UDP 8.15.244.10:5060
;branch=z9hG4bKf5de4d0e3c0860d122139e1e30a2995c
;tag=228209687-tdb1145808424
CSeq: 1 INVITE
Server: Sansay VSX 2.1
Content-Type: application/sdp
Content-Length: 158
v=0
o=sansay-VSX 10 10 IN IP4 64.156.174.71
s=session controller
c=IN IP4 64.156.174.71
t=0 0
m=audio 10766 RTP/AVP 0
a=rtpmap:0 PCMU/8000
a=ptime:20
Max-Forwards: 69
;tag=228209687-tdb1145808424
CSeq: 1 ACK
Allow: INVITE, BYE, OPTIONS, CANCEL, ACK, REGISTER, NOTIFY, INFO, REFER,
SUBSCRIBE, PRACK, UPDATE
Via: SIP/2.0/UDP 8.15.244.10:5060
;branch=z9hG4bK7208e1bfdd2962741dc3dee9d2576820
Content-Length: 0
Thanks,
Nitin Kapoor
Hi,
It is possible.
In theory this could be done with a single c- line, because SDP only talks
about where media is to be sent - not where it comes from.
In reality, however, I assume this is a case where each m- line has its
own c- line, each with a different IP address.
Regards,
Christer
-----Original Message-----
Sent: Thu 12/10/2009 2:10 PM
Subject: [Sip] Two Media Stream in One call
Hello All,
I am facing the issue with one of my customer where he is getting two media
streams in one call and they are using SBC(Nextone)
I checked the signaling traces and everything looks okay to me as well as
the RTP traces too.
As per the traces one RTP packet is going from 64.156.174.71 and the other
is coming from 8.15.244.11.
Could you please let me know is it possible where i can have the two media
streams in one call when this is the not the conference call. And if this is
possible then what is the scenario where its possible.
Please find the attached traces for the same.
Thanks,
Nitin Kapoor
General Telecom
Roni Even
2009-12-10 17:57:35 UTC
Permalink
Hi,
I looked at the SDP you send, you are seeing two RTP streams, one for each
direction. Since both sides talk than you see one RTP steam from 8.15.244.11
in one direction to port 10766 and one from 64.156.174.71 going to the other
direction to port 19612

Roni Even
Post by Christer Holmberg
-----Original Message-----
Christer Holmberg
Sent: Thursday, December 10, 2009 3:54 PM
Subject: Re: [Sip] Two Media Stream in One call
Hi,
It is possible.
In theory this could be done with a single c- line, because SDP only
talks about where media is to be sent - not where it comes from.
In reality, however, I assume this is a case where each m- line has its
own c- line, each with a different IP address.
Regards,
Christer
-----Original Message-----
Sent: Thu 12/10/2009 2:10 PM
Subject: [Sip] Two Media Stream in One call
Hello All,
I am facing the issue with one of my customer where he is getting two media
streams in one call and they are using SBC(Nextone)
I checked the signaling traces and everything looks okay to me as well as
the RTP traces too.
As per the traces one RTP packet is going from 64.156.174.71 and the other
is coming from 8.15.244.11.
Could you please let me know is it possible where i can have the two media
streams in one call when this is the not the conference call. And if this is
possible then what is the scenario where its possible.
Please find the attached traces for the same.
Thanks,
Nitin Kapoor
General Telecom
_______________________________________________
Sip mailing list https://www.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
_______________________________________________
Sip mailing list https://www.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
Use sip-***@cs.columbia.edu for questions on current sip
Use ***@ietf.org for new developments on the application of sip
Nitin Kapoor
2009-12-10 18:03:07 UTC
Permalink
Roni,

So is that the normal call.. I mean is it possible or you have seen any
issue into it..

Please help me on this.

Thanks,
Nitin Kapoor
Post by Roni Even
Hi,
I looked at the SDP you send, you are seeing two RTP streams, one for each
direction. Since both sides talk than you see one RTP steam from 8.15.244.11
in one direction to port 10766 and one from 64.156.174.71 going to the other
direction to port 19612
Roni Even
Post by Christer Holmberg
-----Original Message-----
Christer Holmberg
Sent: Thursday, December 10, 2009 3:54 PM
Subject: Re: [Sip] Two Media Stream in One call
Hi,
It is possible.
In theory this could be done with a single c- line, because SDP only
talks about where media is to be sent - not where it comes from.
In reality, however, I assume this is a case where each m- line has its
own c- line, each with a different IP address.
Regards,
Christer
-----Original Message-----
Sent: Thu 12/10/2009 2:10 PM
Subject: [Sip] Two Media Stream in One call
Hello All,
I am facing the issue with one of my customer where he is getting two media
streams in one call and they are using SBC(Nextone)
I checked the signaling traces and everything looks okay to me as well as
the RTP traces too.
As per the traces one RTP packet is going from 64.156.174.71 and the other
is coming from 8.15.244.11.
Could you please let me know is it possible where i can have the two media
streams in one call when this is the not the conference call. And if this is
possible then what is the scenario where its possible.
Please find the attached traces for the same.
Thanks,
Nitin Kapoor
General Telecom
_______________________________________________
Sip mailing list https://www.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
Roni Even
2009-12-10 18:33:10 UTC
Permalink
This is a normal call, RTP is unidirectional and this is why you see two RTP
streams one from each side for each media channel.

Roni



From: Nitin Kapoor [mailto:***@gmail.com]
Sent: Thursday, December 10, 2009 8:03 PM
To: Roni Even
Cc: Christer Holmberg; ***@ietf.org
Subject: Re: [Sip] Two Media Stream in One call



Roni,

So is that the normal call.. I mean is it possible or you have seen any
issue into it..

Please help me on this.

Thanks,
Nitin Kapoor

2009/12/10 Roni Even <***@gmail.com>

Hi,
I looked at the SDP you send, you are seeing two RTP streams, one for each
direction. Since both sides talk than you see one RTP steam from 8.15.244.11
in one direction to port 10766 and one from 64.156.174.71 going to the other
direction to port 19612

Roni Even
Post by Christer Holmberg
-----Original Message-----
Christer Holmberg
Sent: Thursday, December 10, 2009 3:54 PM
Subject: Re: [Sip] Two Media Stream in One call
Hi,
It is possible.
In theory this could be done with a single c- line, because SDP only
talks about where media is to be sent - not where it comes from.
In reality, however, I assume this is a case where each m- line has its
own c- line, each with a different IP address.
Regards,
Christer
-----Original Message-----
Sent: Thu 12/10/2009 2:10 PM
Subject: [Sip] Two Media Stream in One call
Hello All,
I am facing the issue with one of my customer where he is getting two media
streams in one call and they are using SBC(Nextone)
I checked the signaling traces and everything looks okay to me as well as
the RTP traces too.
As per the traces one RTP packet is going from 64.156.174.71 and the other
is coming from 8.15.244.11.
Could you please let me know is it possible where i can have the two media
streams in one call when this is the not the conference call. And if this is
possible then what is the scenario where its possible.
Please find the attached traces for the same.
Thanks,
Nitin Kapoor
General Telecom
_______________________________________________
Sip mailing list https://www.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
Nitin Kapoor
2009-12-16 22:12:23 UTC
Permalink
Hello Roni,

I still have the doubt.. the point you have mentioned that the the RTP is
the unidirectional and because of that it is showing me two RTP streams.

But if we are decoding the RTP packets and whenever i am trying to hear the
messages then i can see that both have the different conversion..which is
confusing me lot... because without CONFERENCE call how one call have two
different conversion or RTP stream in one dialog...

Please correct me if i am wrong.

Thanks,
Nitin Kapoor
Post by Roni Even
This is a normal call, RTP is unidirectional and this is why you see two
RTP streams one from each side for each media channel.
Roni
*Sent:* Thursday, December 10, 2009 8:03 PM
*To:* Roni Even
*Subject:* Re: [Sip] Two Media Stream in One call
Roni,
So is that the normal call.. I mean is it possible or you have seen any
issue into it..
Please help me on this.
Thanks,
Nitin Kapoor
Hi,
I looked at the SDP you send, you are seeing two RTP streams, one for each
direction. Since both sides talk than you see one RTP steam from 8.15.244.11
in one direction to port 10766 and one from 64.156.174.71 going to the other
direction to port 19612
Roni Even
Post by Christer Holmberg
-----Original Message-----
Christer Holmberg
Sent: Thursday, December 10, 2009 3:54 PM
Subject: Re: [Sip] Two Media Stream in One call
Hi,
It is possible.
In theory this could be done with a single c- line, because SDP only
talks about where media is to be sent - not where it comes from.
In reality, however, I assume this is a case where each m- line has its
own c- line, each with a different IP address.
Regards,
Christer
-----Original Message-----
Sent: Thu 12/10/2009 2:10 PM
Subject: [Sip] Two Media Stream in One call
Hello All,
I am facing the issue with one of my customer where he is getting two media
streams in one call and they are using SBC(Nextone)
I checked the signaling traces and everything looks okay to me as well as
the RTP traces too.
As per the traces one RTP packet is going from 64.156.174.71 and the other
is coming from 8.15.244.11.
Could you please let me know is it possible where i can have the two media
streams in one call when this is the not the conference call. And if this is
possible then what is the scenario where its possible.
Please find the attached traces for the same.
Thanks,
Nitin Kapoor
General Telecom
_______________________________________________
Sip mailing list https://www.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
Nitin Kapoor
2009-12-18 21:55:32 UTC
Permalink
Hello,

Can anyone help me out please on this.

Thanks,
Nitin Kapoor
Post by Nitin Kapoor
Hello Roni,
I still have the doubt.. the point you have mentioned that the the RTP is
the unidirectional and because of that it is showing me two RTP streams.
But if we are decoding the RTP packets and whenever i am trying to hear the
messages then i can see that both have the different conversion..which is
confusing me lot... because without CONFERENCE call how one call have two
different conversion or RTP stream in one dialog...
Please correct me if i am wrong.
Thanks,
Nitin Kapoor
Post by Roni Even
This is a normal call, RTP is unidirectional and this is why you see two
RTP streams one from each side for each media channel.
Roni
*Sent:* Thursday, December 10, 2009 8:03 PM
*To:* Roni Even
*Subject:* Re: [Sip] Two Media Stream in One call
Roni,
So is that the normal call.. I mean is it possible or you have seen any
issue into it..
Please help me on this.
Thanks,
Nitin Kapoor
Hi,
I looked at the SDP you send, you are seeing two RTP streams, one for each
direction. Since both sides talk than you see one RTP steam from 8.15.244.11
in one direction to port 10766 and one from 64.156.174.71 going to the other
direction to port 19612
Roni Even
Post by Christer Holmberg
-----Original Message-----
Christer Holmberg
Sent: Thursday, December 10, 2009 3:54 PM
Subject: Re: [Sip] Two Media Stream in One call
Hi,
It is possible.
In theory this could be done with a single c- line, because SDP only
talks about where media is to be sent - not where it comes from.
In reality, however, I assume this is a case where each m- line has its
own c- line, each with a different IP address.
Regards,
Christer
-----Original Message-----
Sent: Thu 12/10/2009 2:10 PM
Subject: [Sip] Two Media Stream in One call
Hello All,
I am facing the issue with one of my customer where he is getting two media
streams in one call and they are using SBC(Nextone)
I checked the signaling traces and everything looks okay to me as well as
the RTP traces too.
As per the traces one RTP packet is going from 64.156.174.71 and the other
is coming from 8.15.244.11.
Could you please let me know is it possible where i can have the two media
streams in one call when this is the not the conference call. And if this is
possible then what is the scenario where its possible.
Please find the attached traces for the same.
Thanks,
Nitin Kapoor
General Telecom
_______________________________________________
Sip mailing list https://www.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
Dale Worley
2009-12-18 22:00:55 UTC
Permalink
Post by Nitin Kapoor
Can anyone help me out please on this.
If we are to help, you will have to provide more information than you
have. At a minimum, we need to see:

the SDP offer
the SDP answer
a description of each RTP stream you see, including its source address
and its destination address

Dale


_______________________________________________
Sip mailing list https://www.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
Use sip-***@cs.columbia.edu for questions on current sip
Use ***@ietf.org for new developments on the application of sip
Nitin Kapoor
2009-12-18 22:03:01 UTC
Permalink
Dale,

I have the ethreal traces along with RTP stream... i can provide you
that..if that can help to debug the issue.

Thanks,
Nitin Kapoor
Post by Dale Worley
Post by Nitin Kapoor
Can anyone help me out please on this.
If we are to help, you will have to provide more information than you
the SDP offer
the SDP answer
a description of each RTP stream you see, including its source address
and its destination address
Dale
Nitin Kapoor
2009-12-21 11:04:25 UTC
Permalink
Hello Amit,

Okay... but whenever i am trying to decode the RTP packets and trying to
hear the conversation of this.. it seems to be a different conversation...
and which is confusing me a lot.

Also if you think after hearing the conversation of this call...the call is
still normal then could you please elaborate some evidence on which behalf
its look okay to you...

Thanks for your help in advance...

Thanks,
Nitin Kapoor
Dear Nitin,
In these traces every thing seems fine & it’s a normal call. RTP Packets
are bidirectional
64.156.174.71(10766) ß--------à 8.15.244.11(19612)
It should be a single conversation.
*Regards,*
*Amit Vijayvargiya *
------------------------------
*Sent:* Monday, December 21, 2009 10:16 AM
*To:* Amit Vijayvargiya
*Cc:* Christer Holmberg
*Subject:* Re: [Sip] Two Media Stream in One call
Hello Amit,
Please find the attached traces...
Thanks,
Nitin Kapoor
Hi Nitin,
Can you share the ethereal trace of RTP packets.
*Thanks & Regards,*
*Amit Vijayvargiya *
------------------------------
Kapoor
*Sent:* Saturday, December 19, 2009 3:26 AM
*Cc:* Christer Holmberg
*Subject:* Re: [Sip] Two Media Stream in One call
Hello,
Can anyone help me out please on this.
Thanks,
Nitin Kapoor
Hello Roni,
I still have the doubt.. the point you have mentioned that the the RTP is
the unidirectional and because of that it is showing me two RTP streams.
But if we are decoding the RTP packets and whenever i am trying to hear the
messages then i can see that both have the different conversion..which is
confusing me lot... because without CONFERENCE call how one call have two
different conversion or RTP stream in one dialog...
Please correct me if i am wrong.
Thanks,
Nitin Kapoor
This is a normal call, RTP is unidirectional and this is why you see two
RTP streams one from each side for each media channel.
Roni
*Sent:* Thursday, December 10, 2009 8:03 PM
*To:* Roni Even
*Subject:* Re: [Sip] Two Media Stream in One call
Roni,
So is that the normal call.. I mean is it possible or you have seen any
issue into it..
Please help me on this.
Thanks,
Nitin Kapoor
Hi,
I looked at the SDP you send, you are seeing two RTP streams, one for each
direction. Since both sides talk than you see one RTP steam from 8.15.244.11
in one direction to port 10766 and one from 64.156.174.71 going to the other
direction to port 19612
Roni Even
Post by Christer Holmberg
-----Original Message-----
Christer Holmberg
Sent: Thursday, December 10, 2009 3:54 PM
Subject: Re: [Sip] Two Media Stream in One call
Hi,
It is possible.
In theory this could be done with a single c- line, because SDP only
talks about where media is to be sent - not where it comes from.
In reality, however, I assume this is a case where each m- line has its
own c- line, each with a different IP address.
Regards,
Christer
-----Original Message-----
Sent: Thu 12/10/2009 2:10 PM
Subject: [Sip] Two Media Stream in One call
Hello All,
I am facing the issue with one of my customer where he is getting two media
streams in one call and they are using SBC(Nextone)
I checked the signaling traces and everything looks okay to me as well as
the RTP traces too.
As per the traces one RTP packet is going from 64.156.174.71 and the other
is coming from 8.15.244.11.
Could you please let me know is it possible where i can have the two media
streams in one call when this is the not the conference call. And if this is
possible then what is the scenario where its possible.
Please find the attached traces for the same.
Thanks,
Nitin Kapoor
General Telecom
_______________________________________________
Sip mailing list https://www.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
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This message and its attachments contain confidential information and may
also contain legally privileged information. This message is intended solely
for the named addressee. If you are not the addressee indicated in this
message (or authorized to receive for addressee), you may not copy or
deliver any part of this message or its attachments to anyone or use any
part of this message or its attachments. Rather, you should permanently
delete this message and its attachments (and all copies) from your system
and kindly notify the sender by reply E-mail. Any content of this message
and its attachments that does not relate to the official business of SPICE
DIGITAL or its affiliates and/or subsidiaries must be taken not to have been
sent or endorsed by any of them. Opinions and information in this E-mail
that do not relate to the official business of SPICE DIGITAL., shall be
understood as neither given nor endorsed by SPICE DIGITAL.. Any
action/proceeding/opportunity upon the contents of this E-mail taken by not
intended addressee shall attract liabilities both criminal and civil against
such addressee.
E-mail communications are not private and no warranty is made that e-mail
communications are timely, secure or free from computer virus or other
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