In our 3PCC model, the switch is not in a position to do that. It does not control the details of the RTP stream (codec, timestamp, sequence, marker, etc). David From: Paul Timmins [mailto:paul at timmins.net] Sent: Tuesday, April 15, 2014 08:20 To: Hiers, David (DS) Cc: voiceops at voiceops.org Subject: Re: [VoiceOps] Signaling hold to the PSTN Shouldn't the local switch just play hold music into the network, and the other side be completely unaware of hold at all? On Tue, 04/15/2014 10:39 AM, "Hiers, David" <David.Hiers at adp.com<mailto:David.Hiers at adp.com>> wrote: Hi, What has been your experience in signaling holds to the PSTN? The more everyone converts to SIP and peers with our carriers, the more stacks we see on the far end. A growing number seem to have trouble accepting any kind of hold SDP signals such as a=inactive/sendonly, quad zeros, etc. Is this vexing you too, or is it just me? David ________________________________ This message and any attachments are intended only for the use of the addressee and may contain information that is privileged and confidential. If the reader of the message is not the intended recipient or an authorized representative of the intended recipient, you are hereby notified that any dissemination of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail and delete the message and any attachments from your system. _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org<mailto:VoiceOps at voiceops.org> https://puck.nether.net/mailman/listinfo/voiceops This message and any attachments are intended only for the use of the addressee and may contain information that is privileged and confidential. If the reader of the message is not the intended recipient or an authorized representative of the intended recipient, you are hereby notified that any dissemination of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail and delete the message and any attachments from your system.