### Description
We are using kamailio as P-CSCF and its time 2 time crashing only on
production Envoirnmnet with sig11 and sig6.
### Troubleshooting
As my little understanding, issue is with core/timer.c for signal 11 crash and
ims_qos for sig6.
Reproduction
Issue only occour on our
Do Module RTPENGINE Supports 'Replaces' header (RFC 3891), if yes then how to
use this feature, if no then will module RTPEngine will have support for
'Replaces' in the near future? I have been using Freeswitch for this
functionality but facing many difficulties in it.
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@miconda Can you please comment on this.
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Kamailio (SER)
Kamailio didn't start listening on IP mentioned in Module RTPPROXY parameter
[Timeout_Socket](https://kamailio.org/docs/modules/5.1.x/modules/rtpproxy.html#rtpproxy.p.timeout_socket).
Below is my configuration file.
```
loadmodule "rtpproxy.so"
modparam("rtpproxy", "rtpproxy_sock",
