Hello ,
I need information/suggestion in following points,
1) What is transcoding ? What is main objective of it ?
2) How to check whether transciding is implemented or not in perticular Device ?
3)How i can implement the transcoding in UAS and UAC ?
4) Which is best practice to implement trqnscoding , whether in UAC or UAS ?
5) How i can write test cases to test trancoding feature ?
Best Regards,
Sakharam Thorat
Real Time Communications.
--- Sent with Outlook.com, Real Life Real Timeª Mobile ---
--- Original Message ---
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Sent: July 23, 2013 1:00 AM
To: sip-implementors@lists.cs.columbia.edu
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Today's Topics:
1. Re: [SIPForum-discussion] Address change in "Via" field from
private IP to public IP. (Rudra Kant Kanth)
2. Doubt in SIP (voip tester)
3. Re: Doubt in SIP (Tarun2 Gupta)
4. Re: [SIPForum-discussion] Address change in "Via" field from
private IP to public IP. (Mirchandani, Pushpa)
5. Re: [SIPForum-discussion] Address change in "Via" field from
private IP to public IP. (Abinash Sarangi)
----------------------------------------------------------------------
Message: 1
Date: Sat, 20 Jul 2013 23:10:11 +0530
From: Rudra Kant Kanth <rudra...@gmail.com>
Subject: Re: [Sip-implementors] [SIPForum-discussion] Address change
in "Via" field from private IP to public IP.
To: "Srivastava, Gaurav" <gaurav.srivast...@inin.com>
Cc: "discuss...@sipforum.org" <discuss...@sipforum.org>, SIP
Implementors <sip-implementors@lists.cs.columbia.edu>
Message-ID:
<CAKbuNu-GKJ-YudRuAXUc=ji8bz8pjp40wppup--zlwtqmru...@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
Hi Gaurav,
I think what you are seeing with your registration attempts to Skype is a
standard. With what I have read in you explanation, I am expecting that
when you see your public REGISTER message, you would find another via
header appended over there while yours private IP would have got stacked
down.
This new VIA IP would be your proxy or B2BUA, which could also have NAT
functionality. The idea is that your REGISTRAR is sitting over Internet and
there is no way for it to recognise your private IP. So, your B2BUA/ Nat
server provides its IP in the 1st VIA header so that all responses from the
Skype 1st hits this server and thereafter, your server can uniquely route
the response to your private IP.
I am also expecting the presence of Record-Route headers in the going out
requests and for all subsequent request a ROUTE header imbibed-into as
well. The afore-stated details should be aptly seen if you have a trace
running on your B2bUA/NAt server else you may not see all dialogs together
and the sniffer which you are taking would only explain how the end-client
sees tings.
Now, coming to your attempts to register to a PBX which doesn't let you get
the calls. I would like to get a little more details about it to understand
what is happening.
I hope the above explanation would have added value.
Regards,
Rudra
On Fri, Jun 14, 2013 at 12:28 PM, Srivastava, Gaurav <
gaurav.srivast...@inin.com> wrote:
> This is interesting Somesh, maybe such a mechanism is involved after all.
> I wouldn't read much into the second REGISTER part as now I observe all the
> new REGISTERs going out with the public IP address.
>
> Thank you so much for highlighting that, I will check if STUN (or a
> similar mechanism) is in place for the client to be aware of the public IP.
>
> What if such a mechanism was not there , would I face problems ? The sip
> client (un aware of the public IP address) would send out REGISTER having
> my laptop's private IP in the contact & via headers - but I am sure some
> other device along the way would do the honours - I am just not sure which.
>
> I am actually not facing any issues with this. I am having trouble with a
> PBX that I have which does not seem to be "aware" & sends out a REGISTER
> with its private IP in contact & via. Calls do not land on my PBX
> subsequently from the outside, public networks.
>
> Thanks again!
>
> Gaurav Srivastava | Senior Systems Engineer
> phone | +61.449642846 | gaurav.srivast...@inin.com
>
> Interactive Intelligence Inc.
> Deliberately Innovative
> www.inin.com/au-nz
>
> -----Original Message-----
> From: Shanbhag, Somesh (NSN - IN/Bangalore) [mailto:
> somesh.shanb...@nsn.com]
> Sent: Friday, 14 June 2013 4:51 PM
> To: Srivastava, Gaurav; SIP Implementors; discuss...@sipforum.org
> Subject: RE: [Sip-implementors] Address change in "Via" field from private
> IP to public IP.
>
> Hello Gaurav,
>
> May be your sip client is learning the IP address (NAT) via some mechanism
> like STUN etc. But I am not sure, why it only does for second REGISTER. May
> be its designed that way that after learning, during re-REGISTRATIONs it
> will use the learnt address.
>
> One more interesting point - are you facing any issues with this? May be
> your organization NAT is SIP aware?
>
> Br,
> Somesh
>
> -----Original Message-----
> From: ext Srivastava, Gaurav [mailto:gaurav.srivast...@inin.com]
> Sent: Wednesday, June 12, 2013 8:00 AM
> To: SIP Implementors; discuss...@sipforum.org
> Subject: [Sip-implementors] Address change in "Via" field from private IP
> to public IP.
>
> Hi,
>
> I am using a SIP soft phone (Zopier) that registers to Skype. The
> softphone sends out a REGISTER message to sip.skype.com for this.
>
> While going through the messaging, I noticed that initially the via field
> contains my private IP address.
>
> When the client re REGISTERs, the address changes from my private IP to
> the public IP which my organization has.
>
> Please note that I am running the packet capture on my laptop.
>
> I am trying to understand the change in IP address - please let me know if
> you have an understanding of this.
>
> Warm Regards,
> Gaurav Srivastava.
> _______________________________________________
> Sip-implementors mailing list
> Sip-implementors@lists.cs.columbia.edu
> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
>
>
>
> _______________________________________________
> This is the SIP Forum discussion mailing list
> TO UNSUBSCRIBE, or edit your delivery options, please visit
> http://sipforum.org/mailman/listinfo/discussion
> Post to the list at discuss...@sipforum.org
>
------------------------------
Message: 2
Date: Mon, 22 Jul 2013 00:48:56 +0530
From: voip tester <voiptester...@gmail.com>
Subject: [Sip-implementors] Doubt in SIP
To: sip-implementors@lists.cs.columbia.edu
Message-ID:
<cajmls7fnyssiehye7tsoc1ud5c-e1+g2h9gvzjggehv-dte...@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
Hi ,
I have doubt regarding Register ...Please give me details
information ..
1. What is difference between Register and re-register in SIP and how can
identify in the parameter
2.What is third party registration with example ..
*Thanks,
Prakash
*
------------------------------
Message: 3
Date: Mon, 22 Jul 2013 12:09:58 +0530
From: Tarun2 Gupta <tarun2.gu...@aricent.com>
Subject: Re: [Sip-implementors] Doubt in SIP
To: voip tester <voiptester...@gmail.com>,
"sip-implementors@lists.cs.columbia.edu"
<sip-implementors@lists.cs.columbia.edu>
Message-ID:
<bd262adb17bdd74aa30500bc09b694fd0bd52c1...@gurexmb01.asian.ad.aricent.com>
Content-Type: text/plain; charset="us-ascii"
Hi
Queries related to Register can be answered by looking at Chapter 10 of RFC
3261.
3rd party Registration as the name suggests is Registration on somebody else's
behalf by an authorized 3rd party. In such cases, the 'To' contains the AOR to
be registered and the 'From' contains the 3rd party entity that is registering
on someone else's behalf.
Example of 3rd party registration :- In an IMS network, on successful
registration of the UE with the network, the S-CSCF sends a 3rd party
registration to the AS(s) which are interested to be informed about the user
registration event of the subscriber. This usually triggers services to be
executed by an AS. You can refer IMS specifications for further details on this
procedure.
Regards
Tarun Gupta
Aricent
-----Original Message-----
From: voip tester [mailto:voiptester...@gmail.com]
Sent: Monday, July 22, 2013 12:49 AM
To: sip-implementors@lists.cs.columbia.edu
Subject: [Sip-implementors] Doubt in SIP
Hi ,
I have doubt regarding Register ...Please give me details
information ..
1. What is difference between Register and re-register in SIP and how can
identify in the parameter 2.What is third party registration with example ..
*Thanks,
Prakash
*
_______________________________________________
Sip-implementors mailing list
Sip-implementors@lists.cs.columbia.edu
https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
===============================================================================
Please refer to http://www.aricent.com/legal/email_disclaimer.html
for important disclosures regarding this electronic communication.
===============================================================================
------------------------------
Message: 4
Date: Mon, 22 Jul 2013 13:25:30 -0500
From: "Mirchandani, Pushpa" <pushpa.mirchand...@charter.com>
Subject: Re: [Sip-implementors] [SIPForum-discussion] Address change
in "Via" field from private IP to public IP.
To: Rudra Kant Kanth <rudra...@gmail.com>, "Srivastava, Gaurav"
<gaurav.srivast...@inin.com>
Cc: "discuss...@sipforum.org" <discuss...@sipforum.org>, SIP
Implementors <sip-implementors@lists.cs.columbia.edu>
Message-ID:
<ff11208c1fa3aa4d80022058e417211f0243a35...@kstlmexcp04mbx.corp.chartercom.com>
Content-Type: text/plain; charset="us-ascii"
Hi Gaurav,
Make sure you have NAT turn on in the PBX. Hope this helps.
Regards,
Pushpa
From: discussion-boun...@sipforum.org [mailto:discussion-boun...@sipforum.org]
On Behalf Of Rudra Kant Kanth
Sent: Saturday, July 20, 2013 11:40 AM
To: Srivastava, Gaurav
Cc: discuss...@sipforum.org; Shanbhag, Somesh (NSN - IN/Bangalore); SIP
Implementors
Subject: Re: [SIPForum-discussion] [Sip-implementors] Address change in "Via"
field from private IP to public IP.
Hi Gaurav,
I think what you are seeing with your registration attempts to Skype is a
standard. With what I have read in you explanation, I am expecting that when
you see your public REGISTER message, you would find another via header
appended over there while yours private IP would have got stacked down.
This new VIA IP would be your proxy or B2BUA, which could also have NAT
functionality. The idea is that your REGISTRAR is sitting over Internet and
there is no way for it to recognise your private IP. So, your B2BUA/ Nat server
provides its IP in the 1st VIA header so that all responses from the Skype 1st
hits this server and thereafter, your server can uniquely route the response to
your private IP.
I am also expecting the presence of Record-Route headers in the going out
requests and for all subsequent request a ROUTE header imbibed-into as well.
The afore-stated details should be aptly seen if you have a trace running on
your B2bUA/NAt server else you may not see all dialogs together and the sniffer
which you are taking would only explain how the end-client sees tings.
Now, coming to your attempts to register to a PBX which doesn't let you get the
calls. I would like to get a little more details about it to understand what is
happening.
I hope the above explanation would have added value.
Regards,
Rudra
On Fri, Jun 14, 2013 at 12:28 PM, Srivastava, Gaurav
<gaurav.srivast...@inin.com<mailto:gaurav.srivast...@inin.com>> wrote:
This is interesting Somesh, maybe such a mechanism is involved after all. I
wouldn't read much into the second REGISTER part as now I observe all the new
REGISTERs going out with the public IP address.
Thank you so much for highlighting that, I will check if STUN (or a similar
mechanism) is in place for the client to be aware of the public IP.
What if such a mechanism was not there , would I face problems ? The sip client
(un aware of the public IP address) would send out REGISTER having my laptop's
private IP in the contact & via headers - but I am sure some other device along
the way would do the honours - I am just not sure which.
I am actually not facing any issues with this. I am having trouble with a PBX
that I have which does not seem to be "aware" & sends out a REGISTER with its
private IP in contact & via. Calls do not land on my PBX subsequently from the
outside, public networks.
Thanks again!
Gaurav Srivastava | Senior Systems Engineer
phone | +61.449642846<tel:%2B61.449642846> |
gaurav.srivast...@inin.com<mailto:gaurav.srivast...@inin.com>
Interactive Intelligence Inc.
Deliberately Innovative
www.inin.com/au-nz<http://www.inin.com/au-nz>
-----Original Message-----
From: Shanbhag, Somesh (NSN - IN/Bangalore)
[mailto:somesh.shanb...@nsn.com<mailto:somesh.shanb...@nsn.com>]
Sent: Friday, 14 June 2013 4:51 PM
To: Srivastava, Gaurav; SIP Implementors;
discuss...@sipforum.org<mailto:discuss...@sipforum.org>
Subject: RE: [Sip-implementors] Address change in "Via" field from private IP
to public IP.
Hello Gaurav,
May be your sip client is learning the IP address (NAT) via some mechanism like
STUN etc. But I am not sure, why it only does for second REGISTER. May be its
designed that way that after learning, during re-REGISTRATIONs it will use the
learnt address.
One more interesting point - are you facing any issues with this? May be your
organization NAT is SIP aware?
Br,
Somesh
-----Original Message-----
From: ext Srivastava, Gaurav
[mailto:gaurav.srivast...@inin.com<mailto:gaurav.srivast...@inin.com>]
Sent: Wednesday, June 12, 2013 8:00 AM
To: SIP Implementors; discuss...@sipforum.org<mailto:discuss...@sipforum.org>
Subject: [Sip-implementors] Address change in "Via" field from private IP to
public IP.
Hi,
I am using a SIP soft phone (Zopier) that registers to Skype. The softphone
sends out a REGISTER message to sip.skype.com<http://sip.skype.com> for this.
While going through the messaging, I noticed that initially the via field
contains my private IP address.
When the client re REGISTERs, the address changes from my private IP to the
public IP which my organization has.
Please note that I am running the packet capture on my laptop.
I am trying to understand the change in IP address - please let me know if you
have an understanding of this.
Warm Regards,
Gaurav Srivastava.
_______________________________________________
Sip-implementors mailing list
Sip-implementors@lists.cs.columbia.edu<mailto:Sip-implementors@lists.cs.columbia.edu>
https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
_______________________________________________
This is the SIP Forum discussion mailing list
TO UNSUBSCRIBE, or edit your delivery options, please visit
http://sipforum.org/mailman/listinfo/discussion
Post to the list at discuss...@sipforum.org<mailto:discuss...@sipforum.org>
------------------------------
Message: 5
Date: Tue, 23 Jul 2013 00:04:07 +0530
From: Abinash Sarangi <s_abin...@hotmail.com>
Subject: Re: [Sip-implementors] [SIPForum-discussion] Address change
in "Via" field from private IP to public IP.
To: Rudra Kant Kanth <rudra...@gmail.com>, "Srivastava, Gaurav"
<gaurav.srivast...@inin.com>
Cc: "discuss...@sipforum.org" <discuss...@sipforum.org>, SIP
Implementors <sip-implementors@lists.cs.columbia.edu>
Message-ID: <bay177-w471abec777b98bcc72572c9d...@phx.gbl>
Content-Type: text/plain; charset="iso-8859-1"
Hi Gaurav,
please see what is the AOR status of this endpoint in your server(cli command
would help). on or before expiration if the client is re-registering , check
the AOR now..are you getting a "received=<IP>" and rport=<port> in the Via
header in the response packet. that would clearly mention if the NAT is sip
aware ..
Thanks
-Abinash
Date: Sat, 20 Jul 2013 23:10:11 +0530
From: rudra...@gmail.com
To: gaurav.srivast...@inin.com
CC: discuss...@sipforum.org; somesh.shanb...@nsn.com;
sip-implementors@lists.cs.columbia.edu
Subject: Re: [SIPForum-discussion] [Sip-implementors] Address change in "Via"
field from private IP to public IP.
Hi Gaurav,
I think what you are seeing with your registration attempts to Skype is a
standard. With what I have read in you explanation, I am expecting that when
you see your public REGISTER message, you would find another via header
appended over there while yours private IP would have got stacked down.
This new VIA IP would be your proxy or B2BUA, which could also have NAT
functionality. The idea is that your REGISTRAR is sitting over Internet and
there is no way for it to recognise your private IP. So, your B2BUA/ Nat server
provides its IP in the 1st VIA header so that all responses from the Skype 1st
hits this server and thereafter, your server can uniquely route the response to
your private IP.
I am also expecting the presence of Record-Route headers in the going out
requests and for all subsequent request a ROUTE header imbibed-into as well.
The afore-stated details should be aptly seen if you have a trace running on
your B2bUA/NAt server else you may not see all dialogs together and the sniffer
which you are taking would only explain how the end-client sees tings.
Now, coming to your attempts to register to a PBX which doesn't let you get the
calls. I would like to get a little more details about it to understand what is
happening.
I hope the above explanation would have added value.
Regards,
Rudra
On Fri, Jun 14, 2013 at 12:28 PM, Srivastava, Gaurav
<gaurav.srivast...@inin.com> wrote:
This is interesting Somesh, maybe such a mechanism is involved after all. I
wouldn't read much into the second REGISTER part as now I observe all the new
REGISTERs going out with the public IP address.
Thank you so much for highlighting that, I will check if STUN (or a similar
mechanism) is in place for the client to be aware of the public IP.
What if such a mechanism was not there , would I face problems ? The sip client
(un aware of the public IP address) would send out REGISTER having my laptop's
private IP in the contact & via headers - but I am sure some other device along
the way would do the honours - I am just not sure which.
I am actually not facing any issues with this. I am having trouble with a PBX
that I have which does not seem to be "aware" & sends out a REGISTER with its
private IP in contact & via. Calls do not land on my PBX subsequently from the
outside, public networks.
Thanks again!
Gaurav Srivastava | Senior Systems Engineer
phone | +61.449642846 | gaurav.srivast...@inin.com
Interactive Intelligence Inc.
Deliberately Innovative
www.inin.com/au-nz
-----Original Message-----
From: Shanbhag, Somesh (NSN - IN/Bangalore) [mailto:somesh.shanb...@nsn.com]
Sent: Friday, 14 June 2013 4:51 PM
To: Srivastava, Gaurav; SIP Implementors; discuss...@sipforum.org
Subject: RE: [Sip-implementors] Address change in "Via" field from private IP
to public IP.
Hello Gaurav,
May be your sip client is learning the IP address (NAT) via some mechanism like
STUN etc. But I am not sure, why it only does for second REGISTER. May be its
designed that way that after learning, during re-REGISTRATIONs it will use the
learnt address.
One more interesting point - are you facing any issues with this? May be your
organization NAT is SIP aware?
Br,
Somesh
-----Original Message-----
From: ext Srivastava, Gaurav [mailto:gaurav.srivast...@inin.com]
Sent: Wednesday, June 12, 2013 8:00 AM
To: SIP Implementors; discuss...@sipforum.org
Subject: [Sip-implementors] Address change in "Via" field from private IP to
public IP.
Hi,
I am using a SIP soft phone (Zopier) that registers to Skype. The softphone
sends out a REGISTER message to sip.skype.com for this.
While going through the messaging, I noticed that initially the via field
contains my private IP address.
When the client re REGISTERs, the address changes from my private IP to the
public IP which my organization has.
Please note that I am running the packet capture on my laptop.
I am trying to understand the change in IP address - please let me know if you
have an understanding of this.
Warm Regards,
Gaurav Srivastava.
_______________________________________________
Sip-implementors mailing list
Sip-implementors@lists.cs.columbia.edu
https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
_______________________________________________
This is the SIP Forum discussion mailing list
TO UNSUBSCRIBE, or edit your delivery options, please visit
http://sipforum.org/mailman/listinfo/discussion
Post to the list at discuss...@sipforum.org
_______________________________________________
This is the SIP Forum discussion mailing list
TO UNSUBSCRIBE, or edit your delivery options, please visit
http://sipforum.org/mailman/listinfo/discussion
Post to the list at discuss...@sipforum.org
------------------------------
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https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
End of Sip-implementors Digest, Vol 124, Issue 12
*************************************************
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