06-20-2016 05:19 PM - edited 03-17-2019 07:18 AM
Dear All,
Could someone help me understand, why do I need H323 fast start, SIP early offer & SIP early media, when calls can be established with H323 slow start, SIP delay offer? How does it make difference to calls? In what scenario do these benefit?
Thanks in advance
Solved! Go to Solution.
06-20-2016 05:36 PM
To explain it in simple terms,most service provider's prefer early offer .
The reason is when you invoke an early offer you are providing the power of negotiating the capabilities to the other side.They can choose among the list of attributes/parameters shared in initial invite .Also it is almost always used by IP PSTN service providers because that allows one-way media to be established to the calling device on receipt of the SDP Offer in the initial INVITE
Whereas with delayed offer the call agent (CUCM,CUBE) dictate what capabilities (codec,payload type) and it doesn't give much flexibility to the providers.
For more you can refer to below portion of SRND doc.
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/collab10/collab10/trunks.html
Thanks
06-20-2016 05:36 PM
To explain it in simple terms,most service provider's prefer early offer .
The reason is when you invoke an early offer you are providing the power of negotiating the capabilities to the other side.They can choose among the list of attributes/parameters shared in initial invite .Also it is almost always used by IP PSTN service providers because that allows one-way media to be established to the calling device on receipt of the SDP Offer in the initial INVITE
Whereas with delayed offer the call agent (CUCM,CUBE) dictate what capabilities (codec,payload type) and it doesn't give much flexibility to the providers.
For more you can refer to below portion of SRND doc.
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/collab10/collab10/trunks.html
Thanks
06-20-2016 05:56 PM
Thank you, Deepak. Appreciate your quick response.
I shall go through the document and come back to you for any doubts.
09-05-2016 02:02 AM
I have gone the SRND document and it is very informative.
Thank you!
09-05-2016 02:04 AM
Hi Deepak,
I have gone through the SRND document and it is very informative to me.
Appreciate your help,Thank you!
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