[Freeswitch-users] Process REFER and not Hangup the channel

[Sayyed Mohammad Emami Razavi]

Hi There,

I use FS as proxy to handle a call with REFER to. My question is when
get a REFER request, how to do the Transfer regarding the REFER TO
before hangup the current channel. My mean before send back the
NOTIFY, do the INVITE (based on REFER TO), when the INVITE is 200 OK,
then send back NOTIFY.

my logs:

11:24:14.141700 [DEBUG] sofia.c:6616 Process REFER to [11004 at 111.22.33.1]
11:24:14.141700 [DEBUG] switch_ivr.c:1773
(sofia/external/6175552222 at 12.13.14.15) State Change CS_EXECUTE ->
CS_ROUTING
11:24:14.141700 [DEBUG] switch_core_session.c:1287 Send signal
sofia/external/6175552222 at 12.13.14.15 [BREAK]
11:24:14.141700 [DEBUG] switch_core_session.c:830 Send signal
sofia/external/6175552222 at 12.13.14.15 [BREAK]
11:24:14.141700 [NOTICE] switch_ivr.c:1779 Transfer
sofia/external/6175552222 at 12.13.14.15 to XML[11004 at public]
11:24:14.161701 [DEBUG] switch_ivr_play_say.c:1682 done playing file
local_stream://moh
11:24:14.161701 [DEBUG] switch_ivr_bridge.c:597 BRIDGE THREAD DONE
[sofia/external/+18550000000 at 1.2.3.4:5060]
11:24:14.161701 [DEBUG] switch_ivr_bridge.c:622 Send signal
sofia/external/6175552222 at 12.13.14.15 [BREAK]
11:24:14.161701 [DEBUG] switch_channel.c:2979
(sofia/external/+18550000000 at 1.2.3.4:5060) Callstate Change HELD ->
HANGUP

the Transfer to XML[11004 at public] not DONE yet, the
(sofia/external/+18550000000 at 1.2.3.4:5060) already Hangup, How to
delay the Hangup after Transfer is done?