Thanks! 
Rly appreciate your help! 

So, I can try to execute the same branch_route for ACK method?
I have this branch route:

branch_route[MODIFY]{
        uac_replace_from("","$avp(from)");
        uac_replace_to($avp(to));
}

Now I execute this when request goes from asterisk through kamailio to carriers...

Should I execute this branch route into ACK method from asterisk too?

пт, 2 авг. 2019 г. в 20:11, Henning Westerholt <hw@skalatan.de>:

Hello Zhan,

possible reasons:

- the ACK is not routed through your proxy (missing record-route for the INVITE)

- the user agent mangles the Route header, therefore the uac module can't does it work correctly (look to the kamailio error logs if you spot something)

Have a look to your SIP e.g. with "ngrep -qt -d any -W byline port 5060" on your proxy.

Cheers,

Henning

Am 02.08.19 um 19:02 schrieb Zhan Bazarov:
Hello,
Thanks for reply! Yes I execute uac_replace_to/from in branch_route in INVITE method... But it doesn't work for ACK method...

пт, 2 авг. 2019 г. в 18:11, Henning Westerholt <hw@skalatan.de>:

Hello Zhan,

have a look to the "uac" module, there are functions to rewrite the From and To header for passing messages. It works together with the rr module.

Cheers,

Henning

Am 02.08.19 um 13:30 schrieb Zhan Bazarov:
Hello!  Please, is it possible to change from/to headers in ACK message to provider? this is exactly our case, please, look it when u get a chance.  http://sip-router.1086192.n5.nabble.com/Wrong-ACK-to-Provider-td130050.html#a130052

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-- 
Henning Westerholt - https://skalatan.de/blog/
Kamailio services - https://skalatan.de/services
-- 
Henning Westerholt - https://skalatan.de/blog/
Kamailio services - https://skalatan.de/services