you cannot use add_path(), but by creating your own Path header this works, e.g.:

append_hf("Path: <sip:term@HOSTNAME:"+PORT+";lr>\r\n");
(from our P-CSCF config)

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Geschäftsführer: Carsten Bock
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Hi All,

Given a situation where there are multiple registrars, behind a single load balancer, sharing the same location table in DB, I understand that Path can be used to ensure everything works nicely with clients behind NAT. So, if UA1 is registered on P1, UA2 on P2, and UA1 calls UA2... P1 performs lookup, sees path and sends via P2.

What about situations where the distribution between registrars is being handled client-side through DNS SRV, not a load balancer? Path cannot be used then, right? As I understand it, in this instance add_path() will do nothing, is this correct?

Thanks in advance,

Charles

www.sipcentric.com

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