Re: [OpenSER-Users] [OT] Do ITSP SIP_PSTN gateways allow REFER?

El Thursday 15 November 2007 13:18:29 Klaus Darilion escribió:

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Sorry Klaus, I don't understnad what you mean with "screening of REFER and 3XX to the proxy", could you explain it please?

For example, if the system is a POTS replacement (no PBX feature, just VoIP-VoIP and VoIP-PSTN with phone calls) then I would:

1. if method==REFER sl_reply("403","");
2. activate a failure route and if response code = 3xx then

sl_send_reply("500",)

If the system also offers PBX features (call transfer ...) then you can not just block it - but you can screen it - e.g. for REFER requests check if the URI in the Refer-To header does not contain premium rate phone numbers, or that REFERs are not sent to the gateway ...

Ok, understood. Thanks a lot.