hi, Sunil.

It seems as FreeSwitch issue.

You may use att transfer via SIP

1. hold current call

2. invite new call

3. transfer call (with REFER message)

So, you may look at SIP trace and try to find problem point or share it here.

Also there is FreeSwitch app "att_xfer" https://freeswitch.org/confluence/display/FREESWITCH/mod_dptools%3A+att_xfer that may help create att transfer via FreeSwitch core

On 21 August 2018 at 08:37, Sunil More <sunil.more64s@gmail.com> wrote:

Hi All,

I am using kamailio and freeswitch in my setup. While all users are registered on Kamailio, calls are routed to Freeswitch back to kamailio and then upstream providers.

I can make user to user calls but in cases of transfer I am stuck. I am using a Polycom IP phone to test this scenario. While I initiate a attended transfer and click on transfer all the legs hangup.

When I register all users on Freeswitch this works well. I am missing something on Kamailio side.

Please point me in the right direction.

Thanking You,
Sunil More
Ph : 9503338275

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