We are engaged with a large mobile operator and are using there own SIP trunk infrastructure, a CS2K (with ISUP interface to the PSTN) and ACME packet.
The problem is that their SIP trunk is configured to give 183 with SDP immediately upon receiving the outgoing INVITE. After that it is opened for early media, but we never get 180 Ringing, only 200 OK when destination answers. Somewhere between 183 and 200 media changes from silence to ring tone (or announcement). We are dependant on receiving correct alerting notification when destination is ringing. So the question is, can we in sipX some how detect when the media stream starts (assuming there is silence suppression)? Regards, Sven Sven Evensen, Technical Support Consultant OnRelay Elizabeth House | 39 York Road, London SE1 7NQ, UK | +44 (0) 207 902 8123 | sven.even...@onrelay.com | <http://www.onrelay.com/> www.onrelay.com <http://www.onrelay.com/> This electronic message transmission contains information from OnRelay, Ltd., that may be confidential or privileged. The information is intended solely for the recipient and use by any other party is not authorised. If you are not the intended recipient, be aware that any disclosure, copying, distribution or use of the contents of this information or any attachment, is prohibited. If you have received this electronic transmission in error, please notify us immediately by electronic mail (i...@onrelay.com) and delete this message, along with any attachments, from your computer. Registered in England No 04006093 | Registered Office 1st Floor, 236 Gray's Inn Road, London WC1X 8HL
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