1. You have to send PRACK only if 18x contains Require: 100rel and a RSeq header. 2. You can send the UPDATE, but you cannot send a new SDP offer unless the 18x is processed reliably (with PRACK/200).
Stephen James [email protected] We are not princes of the earth, we are the descendants of worms, and any nobility must be earned. ________________________________ From: "Zuñiga, Guillermo" <[email protected]> To: "Zuñiga, Guillermo" <[email protected]>; "[email protected]" <[email protected]>; "[email protected]" <[email protected]>; "[email protected]" <[email protected]> Sent: Thursday, April 24, 2014 1:15 PM Subject: Re: [SIPForum-discussion] PRACK Messages after the 180 Hi fellows, I am having the following issue with a peer carriers conected to my GW. The scenario is the following, a call with a Invite which header 100rel, then the carrier response with 183 session progress and 180 Ringing, I was reading the RFC3262 and I am not pretty sure of the following: 1-Is strictly necesary that GW send a PRACK messages of the 180, before send any other messages in this case a UPDATE? 2- Could be that our GW is sending this UPDATE messages cause the peer is sending us in the 183 SDP Media Attibute information the Media Format value = 18 like [Unknown]? Attach files with info. Regards, Guillermo L. Zuniga C. Support Engineer & VoIP Specialist | e-mail:[email protected] Fix Phone: +5078307365 | MSN IM: [email protected] Mobile: +507 66700481 www.cwpanama.com Guillermo Zuniga Especialista de Soporte Técnico Gerencia de Soporte Técnico Tel: +507 263-6671 Cel: +507 6670-0481 Fax: +507 265-3295 Email: [email protected] Disclaimer: El contenido de este correo es confidencial y puede ser objeto de acciones legales. Es dirigido solo para el o los destinatarios(s) nombrados anteriormente. Si no es mencionado como destinatario, no debe leer, copiar, revelar, reenviar o utilizar el contenido de este mensaje. Si ha recibido este correo por error, por favor notifique al remitente y proceda a borrar el mensaje y archivos adjuntos sin conservar copias. The information contained in this e-mail is confidential and may also be subject to legal privilege. It is intended only for the recipient(s) named above. If you are not named as a recipient, you must not read, copy, disclose, forward or otherwise use the information contained in this email. If you have received this e-mail in error, please notify the sender immediately by reply e-mail and delete the message and any attachments without retaining any copies. _______________________________________________ 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 [email protected] _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
