Re: [Sip-implementors] How to differentiate Hold RTP and voice RTP
In practice, there is no "typical" way of putting a call on hold. The very meaning of that action is highly dependent on what you are looking at. If you are looking at signaling coming from an IP phone, you seldom get a=sendonly when someone is placing a call on hold. You will only see that when someone is playing music on hold, which is more common for a PBX or CPaaS. IP Phones normally do not play music on hold so you will see an a=inactive or c=IN IP4 0.0.0.0 IP address. With CPaaS or PBX to an IP phone, you will see a=sendonly or a=inactive, depending on if the music on hold is configured. When communicating with a VoIP service provider over s SIP trunks with SBC, it is unlikely you will see any signaling, IP, or SSRC changes when a call is placed on hold. If you are directly dealing with IMS or RCS environments, you will be overwhelmed with wonder when trying to decipher the reasoning behind each signaling scenario. So, YMMV _ Roman Shpount On Mon, Oct 10, 2022 at 10:17 PM Dale R. Worley wrote: > Ranjit Avasarala writes: > > Another way to check is the SDP. for hold music, the media attribute > will > > be sendonly. where as for regular voice traffic it will sendrecv > > Yes, the "typical" way to tell that the far end has put you on hold is > that they will send you a=sendonly in the SDP. Of course, that isn't > guaranteed to be done, but at least it is what people expect and many > systems conform to that. > > In regard to trying to determine on-hold status from the RTP, that is > not reliable. If you can detect that the far end is sending music, it > has likely put you on-hold. But somtimes there are voice announcements > during on-hold. > > Dale > ___ > Sip-implementors mailing list > Sip-implementors@lists.cs.columbia.edu > https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors > ___ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
Re: [Sip-implementors] How to differentiate Hold RTP and voice RTP
Ranjit Avasarala writes: > Another way to check is the SDP. for hold music, the media attribute will > be sendonly. where as for regular voice traffic it will sendrecv Yes, the "typical" way to tell that the far end has put you on hold is that they will send you a=sendonly in the SDP. Of course, that isn't guaranteed to be done, but at least it is what people expect and many systems conform to that. In regard to trying to determine on-hold status from the RTP, that is not reliable. If you can detect that the far end is sending music, it has likely put you on-hold. But somtimes there are voice announcements during on-hold. Dale ___ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
Re: [Sip-implementors] How to differentiate Hold RTP and voice RTP
Arun, On 9/22/22 10:56 AM, Arun Tagare wrote: Thanks Ranjit, Yes for the signalling part i am aware, but as shared earlier how the RTP from N/w and other UE in same session be differentiate? So SSRC will be different right? *Nothing* is certain here! The SSRC may be different, but not necessarily. The IP of the media stream may change, but not necessarily. Signaling *may* change the direction to sendonly, but not necessarily. There are no rules for any of this. Lots of different implementations are possible. The answers you get here are generally what people have observed in the environments they are exposed to. A lot of this will be based on some widely deployed implementations. Whether any of those, and if so which, might apply to your environment is hard to say. If figuring this out is important to you, then you need to monitor the environment you operate within. See if most calls have a consistent pattern, or one of a few consistent patterns. Then build to deal with what you find. And be prepared for the cases that don't fit your expectations. Good luck, Paul On Thu, 22 Sep 2022 at 8:05 PM, Ranjit Avasarala wrote: Hi Arun Both are technically voice packets and use RTP protocol. So that way both are similar. Also the voice traffic is end to end whereas hold music is from the server. Like announcement - may be from Application Server. So looking at the SSRC or Source in RTP Packets, you should be able to say which entity is sending those packets. Another way to check is the SDP. for hold music, the media attribute will be sendonly. where as for regular voice traffic it will sendrecv Regards Ranjit On Thu, Sep 22, 2022 at 4:19 AM Amanpreet Singh < amanpreeet.si...@gmail.com> wrote: Arun, for what purpose would you like to inspect and differentiate the hold and audio RTP packets? and based on the signaling messages, can't that be achieved. Thanks, Amanpreet Singh. On Thu, Sep 22, 2022 at 12:30 PM Arun Tagare wrote: Thanks Ranjit & Amanpreet, for your response But my question is MT <= Call Established ===> MO MT <===> Voice RTP Packets flow <=> MO MT <==Hold ===> MO MT < HOLD Tone RTP packets == NW Both Voice RTP packets and Hold RTP packets come to the same port right ? How to differentiate these RTP packets On Thu, Sep 22, 2022 at 11:06 AM Amanpreet Singh < amanpreeet.si...@gmail.com> wrote: Probably you can think of looking into the signaling messages(SDP in case of SIP) to differentiate when the call is on hold and when not i.e. normal audio RTP. BTW what is the use case to differentiate call hold vs audio RTP? Regards, Amanpreet Singh. On Wed, Sep 21, 2022 at 9:51 PM Arun Tagare wrote: Hi All, I have a doubt on the Hold call tone or music on hold tone RTP v/s actual voice RTP before hold Can these RTP packets be able to differentiate? If yes how? if not why? Thanks a lot to everyone in advance -- With Regards Arun A. Tagare +91 9449 029729 ___ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors -- With Regards Arun A. Tagare +91 9449 029729 ___ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors -- With Regards Arun A. Tagare +91 9449 029729 ___ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors ___ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
Re: [Sip-implementors] How to differentiate Hold RTP and voice RTP
Thanks Ranjit and Roman, will go over the link. On Thu, 22 Sep 2022 at 8:40 PM, Roman Shpount wrote: > Arun, > > Depending on the scenario, nothing will be different. You cannot rely on > signaling or SSRC. The calling parting can be behind the PSTN gateway and > continue to send audio regardless of the hold state on the origination > side. The only way to differentiate is to check the actual audio content. > For a generic solution, you need to use a VAD algorithm to differentiate > between voice vs. silence vs. hold music. You can look at > https://source.chromium.org/chromium/chromium/src/+/main:third_party/webrtc/common_audio/vad/ > for reference. > _ > > Roman Shpount > > > On Thu, Sep 22, 2022 at 10:56 AM Arun Tagare > wrote: > >> Thanks Ranjit, >> >> Yes for the signalling part i am aware, but as shared earlier how the RTP >> from N/w and other UE in same session be differentiate? >> >> So SSRC will be different right? >> >> On Thu, 22 Sep 2022 at 8:05 PM, Ranjit Avasarala >> wrote: >> >> > Hi Arun >> > >> > Both are technically voice packets and use RTP protocol. So that way >> both >> > are similar. Also the voice traffic is end to end whereas hold music is >> > from the server. Like announcement - may be from Application Server. >> So >> > looking at the SSRC or Source in RTP Packets, you should be able to say >> > which entity is sending those packets. >> > >> > Another way to check is the SDP. for hold music, the media attribute >> > will be sendonly. where as for regular voice traffic it will sendrecv >> > >> > Regards >> > Ranjit >> > >> > On Thu, Sep 22, 2022 at 4:19 AM Amanpreet Singh < >> > amanpreeet.si...@gmail.com> wrote: >> > >> >> Arun, for what purpose would you like to inspect and differentiate the >> >> hold >> >> and audio RTP packets? >> >> and based on the signaling messages, can't that be achieved. >> >> >> >> Thanks, >> >> Amanpreet Singh. >> >> >> >> >> >> On Thu, Sep 22, 2022 at 12:30 PM Arun Tagare >> >> wrote: >> >> >> >> > Thanks Ranjit & Amanpreet, for your response >> >> > >> >> > But my question is >> >> > >> >> > MT <= Call Established ===> MO >> >> > MT <===> Voice RTP Packets flow <=> MO >> >> > MT <==Hold ===> MO >> >> > MT < HOLD Tone RTP packets == NW >> >> > >> >> > Both Voice RTP packets and Hold RTP packets come to the same port >> right >> >> ? >> >> > How to differentiate these RTP packets >> >> > >> >> > On Thu, Sep 22, 2022 at 11:06 AM Amanpreet Singh < >> >> > amanpreeet.si...@gmail.com> wrote: >> >> > >> >> >> Probably you can think of looking into the signaling messages(SDP in >> >> case >> >> >> of SIP) to differentiate when the call is on hold and when not i.e. >> >> normal >> >> >> audio RTP. >> >> >> >> >> >> BTW what is the use case to differentiate call hold vs audio RTP? >> >> >> >> >> >> >> >> >> Regards, >> >> >> Amanpreet Singh. >> >> >> >> >> >> >> >> >> On Wed, Sep 21, 2022 at 9:51 PM Arun Tagare > > >> >> >> wrote: >> >> >> >> >> >>> Hi All, >> >> >>> >> >> >>> I have a doubt on the Hold call tone or music on hold tone RTP v/s >> >> actual >> >> >>> voice RTP before hold >> >> >>> >> >> >>> Can these RTP packets be able to differentiate? >> >> >>> If yes how? >> >> >>> if not why? >> >> >>> >> >> >>> Thanks a lot to everyone in advance >> >> >>> >> >> >>> -- >> >> >>> >> >> >>> With Regards >> >> >>> >> >> >>> Arun A. Tagare >> >> >>> +91 9449 029729 >> >> >>> ___ >> >> >>> Sip-implementors mailing list >> >> >>> Sip-implementors@lists.cs.columbia.edu >> >> >>> https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors >> >> >>> >> >> >> >> >> > >> >> > -- >> >> > >> >> > With Regards >> >> > >> >> > Arun A. Tagare >> >> > +91 9449 029729 >> >> > >> >> ___ >> >> Sip-implementors mailing list >> >> Sip-implementors@lists.cs.columbia.edu >> >> https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors >> >> >> > -- >> >> With Regards >> >> Arun A. Tagare >> +91 9449 029729 >> ___ >> Sip-implementors mailing list >> Sip-implementors@lists.cs.columbia.edu >> https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors >> > -- With Regards Arun A. Tagare +91 9449 029729 ___ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
Re: [Sip-implementors] How to differentiate Hold RTP and voice RTP
Arun, Depending on the scenario, nothing will be different. You cannot rely on signaling or SSRC. The calling parting can be behind the PSTN gateway and continue to send audio regardless of the hold state on the origination side. The only way to differentiate is to check the actual audio content. For a generic solution, you need to use a VAD algorithm to differentiate between voice vs. silence vs. hold music. You can look at https://source.chromium.org/chromium/chromium/src/+/main:third_party/webrtc/common_audio/vad/ for reference. _ Roman Shpount On Thu, Sep 22, 2022 at 10:56 AM Arun Tagare wrote: > Thanks Ranjit, > > Yes for the signalling part i am aware, but as shared earlier how the RTP > from N/w and other UE in same session be differentiate? > > So SSRC will be different right? > > On Thu, 22 Sep 2022 at 8:05 PM, Ranjit Avasarala > wrote: > > > Hi Arun > > > > Both are technically voice packets and use RTP protocol. So that way > both > > are similar. Also the voice traffic is end to end whereas hold music is > > from the server. Like announcement - may be from Application Server. So > > looking at the SSRC or Source in RTP Packets, you should be able to say > > which entity is sending those packets. > > > > Another way to check is the SDP. for hold music, the media attribute > > will be sendonly. where as for regular voice traffic it will sendrecv > > > > Regards > > Ranjit > > > > On Thu, Sep 22, 2022 at 4:19 AM Amanpreet Singh < > > amanpreeet.si...@gmail.com> wrote: > > > >> Arun, for what purpose would you like to inspect and differentiate the > >> hold > >> and audio RTP packets? > >> and based on the signaling messages, can't that be achieved. > >> > >> Thanks, > >> Amanpreet Singh. > >> > >> > >> On Thu, Sep 22, 2022 at 12:30 PM Arun Tagare > >> wrote: > >> > >> > Thanks Ranjit & Amanpreet, for your response > >> > > >> > But my question is > >> > > >> > MT <= Call Established ===> MO > >> > MT <===> Voice RTP Packets flow <=> MO > >> > MT <==Hold ===> MO > >> > MT < HOLD Tone RTP packets == NW > >> > > >> > Both Voice RTP packets and Hold RTP packets come to the same port > right > >> ? > >> > How to differentiate these RTP packets > >> > > >> > On Thu, Sep 22, 2022 at 11:06 AM Amanpreet Singh < > >> > amanpreeet.si...@gmail.com> wrote: > >> > > >> >> Probably you can think of looking into the signaling messages(SDP in > >> case > >> >> of SIP) to differentiate when the call is on hold and when not i.e. > >> normal > >> >> audio RTP. > >> >> > >> >> BTW what is the use case to differentiate call hold vs audio RTP? > >> >> > >> >> > >> >> Regards, > >> >> Amanpreet Singh. > >> >> > >> >> > >> >> On Wed, Sep 21, 2022 at 9:51 PM Arun Tagare > >> >> wrote: > >> >> > >> >>> Hi All, > >> >>> > >> >>> I have a doubt on the Hold call tone or music on hold tone RTP v/s > >> actual > >> >>> voice RTP before hold > >> >>> > >> >>> Can these RTP packets be able to differentiate? > >> >>> If yes how? > >> >>> if not why? > >> >>> > >> >>> Thanks a lot to everyone in advance > >> >>> > >> >>> -- > >> >>> > >> >>> With Regards > >> >>> > >> >>> Arun A. Tagare > >> >>> +91 9449 029729 > >> >>> ___ > >> >>> Sip-implementors mailing list > >> >>> Sip-implementors@lists.cs.columbia.edu > >> >>> https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors > >> >>> > >> >> > >> > > >> > -- > >> > > >> > With Regards > >> > > >> > Arun A. Tagare > >> > +91 9449 029729 > >> > > >> ___ > >> Sip-implementors mailing list > >> Sip-implementors@lists.cs.columbia.edu > >> https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors > >> > > -- > > With Regards > > Arun A. Tagare > +91 9449 029729 > ___ > Sip-implementors mailing list > Sip-implementors@lists.cs.columbia.edu > https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors > ___ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
Re: [Sip-implementors] How to differentiate Hold RTP and voice RTP
Hi Arun you won't get RTP from NW and end point at the same time. consider this scenario: User Alice calls User Bob. Now Bob is busy with other call. So here User Alice will hear a hold tone i.e busy signal and would get 486 Busy here. Here SSRC would be server . So now Alice will not get any RTP packets from User Bob Then User Alice may remain on hold or disconnect or can request call back. So when user Alice get call back and gets connected with User Bob, then User Alice will see RTP packets from User B - these are end to end. Here SSRC would be User Bob. So looking at SSRC / Source in RTP, you can differentiate. Also hold packets will have music which can tell u that they are for hold. On Thu, Sep 22, 2022 at 9:56 AM Arun Tagare wrote: > Thanks Ranjit, > > Yes for the signalling part i am aware, but as shared earlier how the RTP > from N/w and other UE in same session be differentiate? > > So SSRC will be different right? > > On Thu, 22 Sep 2022 at 8:05 PM, Ranjit Avasarala > wrote: > >> Hi Arun >> >> Both are technically voice packets and use RTP protocol. So that way >> both are similar. Also the voice traffic is end to end whereas hold music >> is from the server. Like announcement - may be from Application Server. >> So looking at the SSRC or Source in RTP Packets, you should be able to say >> which entity is sending those packets. >> >> Another way to check is the SDP. for hold music, the media attribute >> will be sendonly. where as for regular voice traffic it will sendrecv >> >> Regards >> Ranjit >> >> On Thu, Sep 22, 2022 at 4:19 AM Amanpreet Singh < >> amanpreeet.si...@gmail.com> wrote: >> >>> Arun, for what purpose would you like to inspect and differentiate the >>> hold >>> and audio RTP packets? >>> and based on the signaling messages, can't that be achieved. >>> >>> Thanks, >>> Amanpreet Singh. >>> >>> >>> On Thu, Sep 22, 2022 at 12:30 PM Arun Tagare >>> wrote: >>> >>> > Thanks Ranjit & Amanpreet, for your response >>> > >>> > But my question is >>> > >>> > MT <= Call Established ===> MO >>> > MT <===> Voice RTP Packets flow <=> MO >>> > MT <==Hold ===> MO >>> > MT < HOLD Tone RTP packets == NW >>> > >>> > Both Voice RTP packets and Hold RTP packets come to the same port >>> right ? >>> > How to differentiate these RTP packets >>> > >>> > On Thu, Sep 22, 2022 at 11:06 AM Amanpreet Singh < >>> > amanpreeet.si...@gmail.com> wrote: >>> > >>> >> Probably you can think of looking into the signaling messages(SDP in >>> case >>> >> of SIP) to differentiate when the call is on hold and when not i.e. >>> normal >>> >> audio RTP. >>> >> >>> >> BTW what is the use case to differentiate call hold vs audio RTP? >>> >> >>> >> >>> >> Regards, >>> >> Amanpreet Singh. >>> >> >>> >> >>> >> On Wed, Sep 21, 2022 at 9:51 PM Arun Tagare >>> >> wrote: >>> >> >>> >>> Hi All, >>> >>> >>> >>> I have a doubt on the Hold call tone or music on hold tone RTP v/s >>> actual >>> >>> voice RTP before hold >>> >>> >>> >>> Can these RTP packets be able to differentiate? >>> >>> If yes how? >>> >>> if not why? >>> >>> >>> >>> Thanks a lot to everyone in advance >>> >>> >>> >>> -- >>> >>> >>> >>> With Regards >>> >>> >>> >>> Arun A. Tagare >>> >>> +91 9449 029729 >>> >>> ___ >>> >>> Sip-implementors mailing list >>> >>> Sip-implementors@lists.cs.columbia.edu >>> >>> https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors >>> >>> >>> >> >>> > >>> > -- >>> > >>> > With Regards >>> > >>> > Arun A. Tagare >>> > +91 9449 029729 >>> > >>> ___ >>> Sip-implementors mailing list >>> Sip-implementors@lists.cs.columbia.edu >>> https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors >>> >> -- > > With Regards > > Arun A. Tagare > +91 9449 029729 > ___ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
Re: [Sip-implementors] How to differentiate Hold RTP and voice RTP
Thanks Ranjit, Yes for the signalling part i am aware, but as shared earlier how the RTP from N/w and other UE in same session be differentiate? So SSRC will be different right? On Thu, 22 Sep 2022 at 8:05 PM, Ranjit Avasarala wrote: > Hi Arun > > Both are technically voice packets and use RTP protocol. So that way both > are similar. Also the voice traffic is end to end whereas hold music is > from the server. Like announcement - may be from Application Server. So > looking at the SSRC or Source in RTP Packets, you should be able to say > which entity is sending those packets. > > Another way to check is the SDP. for hold music, the media attribute > will be sendonly. where as for regular voice traffic it will sendrecv > > Regards > Ranjit > > On Thu, Sep 22, 2022 at 4:19 AM Amanpreet Singh < > amanpreeet.si...@gmail.com> wrote: > >> Arun, for what purpose would you like to inspect and differentiate the >> hold >> and audio RTP packets? >> and based on the signaling messages, can't that be achieved. >> >> Thanks, >> Amanpreet Singh. >> >> >> On Thu, Sep 22, 2022 at 12:30 PM Arun Tagare >> wrote: >> >> > Thanks Ranjit & Amanpreet, for your response >> > >> > But my question is >> > >> > MT <= Call Established ===> MO >> > MT <===> Voice RTP Packets flow <=> MO >> > MT <==Hold ===> MO >> > MT < HOLD Tone RTP packets == NW >> > >> > Both Voice RTP packets and Hold RTP packets come to the same port right >> ? >> > How to differentiate these RTP packets >> > >> > On Thu, Sep 22, 2022 at 11:06 AM Amanpreet Singh < >> > amanpreeet.si...@gmail.com> wrote: >> > >> >> Probably you can think of looking into the signaling messages(SDP in >> case >> >> of SIP) to differentiate when the call is on hold and when not i.e. >> normal >> >> audio RTP. >> >> >> >> BTW what is the use case to differentiate call hold vs audio RTP? >> >> >> >> >> >> Regards, >> >> Amanpreet Singh. >> >> >> >> >> >> On Wed, Sep 21, 2022 at 9:51 PM Arun Tagare >> >> wrote: >> >> >> >>> Hi All, >> >>> >> >>> I have a doubt on the Hold call tone or music on hold tone RTP v/s >> actual >> >>> voice RTP before hold >> >>> >> >>> Can these RTP packets be able to differentiate? >> >>> If yes how? >> >>> if not why? >> >>> >> >>> Thanks a lot to everyone in advance >> >>> >> >>> -- >> >>> >> >>> With Regards >> >>> >> >>> Arun A. Tagare >> >>> +91 9449 029729 >> >>> ___ >> >>> Sip-implementors mailing list >> >>> Sip-implementors@lists.cs.columbia.edu >> >>> https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors >> >>> >> >> >> > >> > -- >> > >> > With Regards >> > >> > Arun A. Tagare >> > +91 9449 029729 >> > >> ___ >> Sip-implementors mailing list >> Sip-implementors@lists.cs.columbia.edu >> https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors >> > -- With Regards Arun A. Tagare +91 9449 029729 ___ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
Re: [Sip-implementors] How to differentiate Hold RTP and voice RTP
Hi Arun Both are technically voice packets and use RTP protocol. So that way both are similar. Also the voice traffic is end to end whereas hold music is from the server. Like announcement - may be from Application Server. So looking at the SSRC or Source in RTP Packets, you should be able to say which entity is sending those packets. Another way to check is the SDP. for hold music, the media attribute will be sendonly. where as for regular voice traffic it will sendrecv Regards Ranjit On Thu, Sep 22, 2022 at 4:19 AM Amanpreet Singh wrote: > Arun, for what purpose would you like to inspect and differentiate the hold > and audio RTP packets? > and based on the signaling messages, can't that be achieved. > > Thanks, > Amanpreet Singh. > > > On Thu, Sep 22, 2022 at 12:30 PM Arun Tagare > wrote: > > > Thanks Ranjit & Amanpreet, for your response > > > > But my question is > > > > MT <= Call Established ===> MO > > MT <===> Voice RTP Packets flow <=> MO > > MT <==Hold ===> MO > > MT < HOLD Tone RTP packets == NW > > > > Both Voice RTP packets and Hold RTP packets come to the same port right ? > > How to differentiate these RTP packets > > > > On Thu, Sep 22, 2022 at 11:06 AM Amanpreet Singh < > > amanpreeet.si...@gmail.com> wrote: > > > >> Probably you can think of looking into the signaling messages(SDP in > case > >> of SIP) to differentiate when the call is on hold and when not i.e. > normal > >> audio RTP. > >> > >> BTW what is the use case to differentiate call hold vs audio RTP? > >> > >> > >> Regards, > >> Amanpreet Singh. > >> > >> > >> On Wed, Sep 21, 2022 at 9:51 PM Arun Tagare > >> wrote: > >> > >>> Hi All, > >>> > >>> I have a doubt on the Hold call tone or music on hold tone RTP v/s > actual > >>> voice RTP before hold > >>> > >>> Can these RTP packets be able to differentiate? > >>> If yes how? > >>> if not why? > >>> > >>> Thanks a lot to everyone in advance > >>> > >>> -- > >>> > >>> With Regards > >>> > >>> Arun A. Tagare > >>> +91 9449 029729 > >>> ___ > >>> Sip-implementors mailing list > >>> Sip-implementors@lists.cs.columbia.edu > >>> https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors > >>> > >> > > > > -- > > > > With Regards > > > > Arun A. Tagare > > +91 9449 029729 > > > ___ > Sip-implementors mailing list > Sip-implementors@lists.cs.columbia.edu > https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors > ___ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
Re: [Sip-implementors] How to differentiate Hold RTP and voice RTP
Arun, for what purpose would you like to inspect and differentiate the hold and audio RTP packets? and based on the signaling messages, can't that be achieved. Thanks, Amanpreet Singh. On Thu, Sep 22, 2022 at 12:30 PM Arun Tagare wrote: > Thanks Ranjit & Amanpreet, for your response > > But my question is > > MT <= Call Established ===> MO > MT <===> Voice RTP Packets flow <=> MO > MT <==Hold ===> MO > MT < HOLD Tone RTP packets == NW > > Both Voice RTP packets and Hold RTP packets come to the same port right ? > How to differentiate these RTP packets > > On Thu, Sep 22, 2022 at 11:06 AM Amanpreet Singh < > amanpreeet.si...@gmail.com> wrote: > >> Probably you can think of looking into the signaling messages(SDP in case >> of SIP) to differentiate when the call is on hold and when not i.e. normal >> audio RTP. >> >> BTW what is the use case to differentiate call hold vs audio RTP? >> >> >> Regards, >> Amanpreet Singh. >> >> >> On Wed, Sep 21, 2022 at 9:51 PM Arun Tagare >> wrote: >> >>> Hi All, >>> >>> I have a doubt on the Hold call tone or music on hold tone RTP v/s actual >>> voice RTP before hold >>> >>> Can these RTP packets be able to differentiate? >>> If yes how? >>> if not why? >>> >>> Thanks a lot to everyone in advance >>> >>> -- >>> >>> With Regards >>> >>> Arun A. Tagare >>> +91 9449 029729 >>> ___ >>> Sip-implementors mailing list >>> Sip-implementors@lists.cs.columbia.edu >>> https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors >>> >> > > -- > > With Regards > > Arun A. Tagare > +91 9449 029729 > ___ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
Re: [Sip-implementors] How to differentiate Hold RTP and voice RTP
Thanks Ranjit & Amanpreet, for your response But my question is MT <= Call Established ===> MO MT <===> Voice RTP Packets flow <=> MO MT <==Hold ===> MO MT < HOLD Tone RTP packets == NW Both Voice RTP packets and Hold RTP packets come to the same port right ? How to differentiate these RTP packets On Thu, Sep 22, 2022 at 11:06 AM Amanpreet Singh wrote: > Probably you can think of looking into the signaling messages(SDP in case > of SIP) to differentiate when the call is on hold and when not i.e. normal > audio RTP. > > BTW what is the use case to differentiate call hold vs audio RTP? > > > Regards, > Amanpreet Singh. > > > On Wed, Sep 21, 2022 at 9:51 PM Arun Tagare > wrote: > >> Hi All, >> >> I have a doubt on the Hold call tone or music on hold tone RTP v/s actual >> voice RTP before hold >> >> Can these RTP packets be able to differentiate? >> If yes how? >> if not why? >> >> Thanks a lot to everyone in advance >> >> -- >> >> With Regards >> >> Arun A. Tagare >> +91 9449 029729 >> ___ >> Sip-implementors mailing list >> Sip-implementors@lists.cs.columbia.edu >> https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors >> > -- With Regards Arun A. Tagare +91 9449 029729 ___ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
Re: [Sip-implementors] How to differentiate Hold RTP and voice RTP
Probably you can think of looking into the signaling messages(SDP in case of SIP) to differentiate when the call is on hold and when not i.e. normal audio RTP. BTW what is the use case to differentiate call hold vs audio RTP? Regards, Amanpreet Singh. On Wed, Sep 21, 2022 at 9:51 PM Arun Tagare wrote: > Hi All, > > I have a doubt on the Hold call tone or music on hold tone RTP v/s actual > voice RTP before hold > > Can these RTP packets be able to differentiate? > If yes how? > if not why? > > Thanks a lot to everyone in advance > > -- > > With Regards > > Arun A. Tagare > +91 9449 029729 > ___ > Sip-implementors mailing list > Sip-implementors@lists.cs.columbia.edu > https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors > ___ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
[Sip-implementors] How to differentiate Hold RTP and voice RTP
Hi All, I have a doubt on the Hold call tone or music on hold tone RTP v/s actual voice RTP before hold Can these RTP packets be able to differentiate? If yes how? if not why? Thanks a lot to everyone in advance -- With Regards Arun A. Tagare +91 9449 029729 ___ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
