Hey Andy,

not interested in the consulting myself, but as I have a small bit of using freeswitch as an sbc in the past, did you try to enable the option on your call to rewrite the rtp-timestamps? This may fix the first issue, depending on the exact sip-scenario.

<param name="rtp-rewrite-timestamps" value="true"/> ...

You can do a lot with transfers in freeswitch. If it's a refer, you'll have to implement the refer-dialplan-part, but it has been a while and maybe I'm out-of-date :).

Just a quick idea that help you along maybe.

Kind regards,

Michem

On Mon, Jun 29, 2020 at 8:44 PM Andy Newlands <andynewlands@gmail.com> wrote:

We are using Freeswitch as the core of our UK-based SIP platform, which connects with main carriers in the UK, and have a couple of issues which we have been unable to properly resolve ourselves.  We are now seeking a Freeswitch expert who can assist in achieving resolution, on a consultancy/contract basis.

Where is the most appropriate place to find suitably qualified experts, with proven track-records and endorsements?

Layout is basically PSTN_CARRIER<->FS<-->CUSTOMER_PBX

(there are also proxies and FS-based SBCs (Kamailio))

At high-level, the issues are:

• Loss of RTP when a call is transferred or diverted by the CUSTOMER_PBX
• Attempting to transfer a call from the CUSTOMER_PBX can result in ringback continuing, after the transfer-to endpoint answers (again, no RTP).
• Behaviour varies depending on which PSTN_CARRIER calls are routed through (we have multiple interconnects)
• We can see nothing obviously wrong in the call traces.

Thank you

Kind regards,

Andy

_________________________________________________________________________

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_________________________________________________________________________

The FreeSWITCH project is sponsored by SignalWire https://signalwire.com
Enhance your FreeSWITCH install with disruptive priced SMS and PSTN services.
Build your next product on our scalable cloud platform.

Join our online community to chat in real time https://signalwire.community

Professional FreeSWITCH Services
sales@freeswitch.com
https://freeswitch.com

Official FreeSWITCH Sites
https://freeswitch.com/oss
https://freeswitch.org/confluence
https://cluecon.com

FreeSWITCH-dev mailing list
FreeSWITCH-dev@lists.freeswitch.org
http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
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