Hi Guillermo, Contact header could be anonymous in some cases. An example is when you hide your Caller ID. A.C Sent from my Samsung Galaxy smartphone. -------- Original message --------From: "Zuñiga, Guillermo" <guillermo.zun...@cwpanama.com> Date: 3/2/18 05:07 (GMT+07:00) To: Aman <amanpreeet.si...@gmail.com> Cc: discuss...@sipforum.org, sip-implementors@lists.cs.columbia.edu Subject: Re: [Sip-implementors] is Contact Header Mandatory and could be anonymous in the INVITE Thanks for that,
I Access enviroment not PEER to PEER connection, CONTACT could be anonymous or always should be any valid uri-user? Regards, Thanks Guillermo De: Aman [mailto:amanpreeet.si...@gmail.com] Enviado el: Monday, February 26, 2018 3:11 AM Para: Zuñiga, Guillermo CC: discuss...@sipforum.org; sip-implementors@lists.cs.columbia.edu Asunto: Re: [Sip-implementors] is Contact Header Mandatory and could be anonymous in the INVITE Yes, CONTACT header field is mandatory for the SIP INVITE request. Cheers, Aman preet Singh On Thu, Feb 22, 2018 at 12:57 AM, Zuñiga, Guillermo <guillermo.zun...@cwpanama.com<mailto:guillermo.zun...@cwpanama.com>> wrote: Hi fellows, I would you can help me to know and be clear about the following questions: Is the CONTACT header mandatory that always have to be present in the INVITE? I am asking that for the case that imagine that Endpoint after is Registered in a Registrar Server, send me the following header info. FROM uri-user =anonymous@domain/ip TO uri-user=called(uri-user)@domain/ip CONTACT = could be anonymous@domain/ip or should be original uri-user@domain/ip ?? if you can help me to identify this in the RFC or give some tips more where I can search more information, will be great. According with the RFC 3261, 8.1.1.8 Contact The Contact header field provides a SIP or SIPS URI that can be used to contact that specific instance of the UA for subsequent requests. The Contact header field MUST be present and contain exactly one SIP or SIPS URI in any request that can result in the establishment of a dialog. For the methods defined in this specification, that includes only the INVITE request. For these requests, the scope of the Contact is global. That is, the Contact header field value contains the URI at which the UA would like to receive requests, and this URI MUST be valid even if used in subsequent requests outside of any dialogs. If the Request-URI or top Route header field value contains a SIPS URI, the Contact header field MUST contain a SIPS URI as well. For further information on the Contact header field, see Section 20.10. Regards and thanks for all your time. I really appreciate a lot your time. Thanks, Guillermo Guillermo Zuniga Especialista de Soporte Técnico Gerencia de Soporte Técnico Tel: +507 263-6671 Cel: +507 6670-0481 Fax: +507 265-3295 Email: guillermo.zun...@cwpanama.com<mailto:guillermo.zun...@cwpanama.com> [cid:image3f4341.JPG@d191b510.4e907fe0]<http://> <http://www.cwpanama.com> <http://www.cwpanama.com> <http://play.google.com/store/apps/details?id=com.croem.web.cwp> <http://www.facebook.com/masmovilpanama> <http://www.cwpanama.com> <http://bit.ly/MasMovil> <http://www.facebook.com/masmovilpanama> <http://www.facebook.com/masmovilpanama> [cid:image447e4b.JPG@010140db.4385dd6c]<http://> 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. Guillermo Zuniga Especialista de Soporte Técnico Gerencia de Soporte Técnico Tel: +507 263-6671 Cel: +507 6670-0481 Email: guillermo.zun...@cwpanama.com [cid:image2de857.JPG@a646cd6c.458f29e7]<http://> <http://www.cwpanama.com> <http://www.cwpanama.com> <http://play.google.com/store/apps/details?id=com.croem.web.cwp> <http://www.facebook.com/masmovilpanama> <http://www.cwpanama.com> <http://bit.ly/MasMovil> <http://www.facebook.com/masmovilpanama> <http://www.facebook.com/masmovilpanama> <https://play.google.com/store/apps/details?id=com.croem.web.cwp> <http://www.cwpanama.com> [cid:image4e1677.JPG@f5733792.48a6d594]<http://> _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu<mailto: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 mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
