[OpenSIPS-Users] Detect failed SIP server

Bogdan-Andrei Iancu bogdan at opensips.org
Wed Apr 3 13:56:01 CEST 2013

Hi Chen-Che,

In your script, you can set this timer in a per-request fashion via the 
TM fr_timer_avp (see 

Best regards,

Bogdan-Andrei Iancu
OpenSIPS Founder and Developer

On 04/03/2013 02:19 PM, microx wrote:
> Hi Bogdan-Andrei,
> Although setting fr_timer enables the outbound proxy to detect the status of
> internal SIP servers, a "side-effect" occurs for me. Specifically, with
> modparam("tm", "fr_timer", 10), the outbound proxy can know the SIP server
> being dead within about 10 seconds when some internal SIP server went down.
> But, this causes the outbound proxy to issue a "408 request timeout" message
> when a callee does not reply a 200 ok to a caller within 10 seconds.
> I wonder whether there is any mechanism to make the outbound proxy use
> different timers for detecting status of internal SIP servers and processing
> normal SIP messages. Many thanks in advance.
> Best wishes,
> Chen-Che
> --
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