[Kamailio-Users] Transfer/Refer of calls

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Hi, just noticed that we can't transfer calls...

We use SNOM UA's for our enduser and run Kamailio 1.4 as our SIP router. Kamailio routes all external calls to a remote SIP gateway (telco). Which is the same gateway that accepts calls from the PSTN and relays it via SIP to us.

Now, the issue seems to be that when we do an attended call transfer the UA sends a refer message to the GW... which the GW doesn't support!

Is there any other way of doing transfers/refer with Kamailio (or does anyone know a workaround for the SNOM UA's?)

Thanks for any insight, this is about to become a showstopper for our telephone service :(

- - Geir