Try adding this before your bridge:
http://wiki.freeswitch.org/wiki/Channel_Variables#ringback

-MC

On Thu, Feb 23, 2012 at 10:56 AM, Harry Coin <hcoin@quietfountain.com> wrote:
Hello all, great project!

In the simple case of dialing out through a small 4 port fxo (grandstream-4104) there is an unwelcome ringback silence gap of almost exactly 10 seconds while the fxo goes offhook and issues its dtmf, then the audio resumes with whatever audio the PSTN sends in response to the dialled number.

I've tried to continue the ringback music using ignore_early_media=true with no success.  Tried transfer_ringback, instant_ringback, no joy.    In the following short fs_cli trace no matter what I try the music stops at the point below noted as 12:19:44... and there is silence until 12:19:54... when the PSTN provides audio.  What can I do to keep the ringback music going until  the log point noted at ...:54xxxx below?

2012-02-23 12:19:44.000317 [DEBUG] mod_dptools.c:1176 sofia/internal/011@gate.quietfountain.com SET [bypass_media]=[true]
 EXECUTE sofia/internal/011@gate.quietfountain.com bridge({ignore_early_media=true}sofia/internal/9935551212@fxoports1to4.quietfountain.com|sofia/internal/9915551212@fxoports1to4.quietfountain.com)

2012-02-23 12:19:44.000317 [DEBUG] switch_ivr_originate.c:1882 Parsing global variables
2012-02-23 12:19:44.000317 [DEBUG] switch_event.c:1521 Parsing variable [ignore_early_media]=[true]
2012-02-23 12:19:44.000317 [NOTICE] switch_channel.c:911 New Channel sofia/internal/9935551212@fxoports1to4.quietfountain.com [ab71adf5-4a5e-e111-b2c4-00104b98432d]

2012-02-23 12:19:44.000317 [DEBUG] mod_sofia.c:4496 (sofia/internal/9935551212@fxoports1to4.quietfountain.com) State Change CS_NEW -> CS_INIT
2012-02-23 12:19:44.000317 [DEBUG] switch_core_session.c:1175 Send signal sofia/internal/9935551212@fxoports1to4.quietfountain.com [BREAK]
2012-02-23 12:19:44.021687 [DEBUG] switch_core_state_machine.c:362 (sofia/internal/9935551212@fxoports1to4.quietfountain.com) Running State Change CS_INIT
2012-02-23 12:19:44.021687 [DEBUG] switch_core_state_machine.c:401 (sofia/internal/9935551212@fxoports1to4.quietfountain.com) State INIT
2012-02-23 12:19:44.021687 [DEBUG] mod_sofia.c:85 sofia/internal/9935551212@fxoports1to4.quietfountain.com SOFIA INIT
2012-02-23 12:19:44.021687 [DEBUG] mod_sofia.c:125 (sofia/internal/9935551212@fxoports1to4.quietfountain.com) State Change CS_INIT -> CS_ROUTING
2012-02-23 12:19:44.021687 [DEBUG] switch_core_session.c:1175 Send signal sofia/internal/9935551212@fxoports1to4.quietfountain.com [BREAK]
2012-02-23 12:19:44.021687 [DEBUG] switch_core_state_machine.c:401 (sofia/internal/9935551212@fxoports1to4.quietfountain.com) State INIT going to sleep
2012-02-23 12:19:44.021687 [DEBUG] switch_core_state_machine.c:362 (sofia/internal/9935551212@fxoports1to4.quietfountain.com) Running State Change CS_ROUTING
2012-02-23 12:19:44.021687 [DEBUG] switch_channel.c:1840 (sofia/internal/9935551212@fxoports1to4.quietfountain.com) Callstate Change DOWN -> RINGING
2012-02-23 12:19:44.021687 [DEBUG] switch_core_state_machine.c:410 (sofia/internal/9935551212@fxoports1to4.quietfountain.com) State ROUTING
2012-02-23 12:19:44.021687 [DEBUG] mod_sofia.c:148 sofia/internal/9935551212@fxoports1to4.quietfountain.com SOFIA ROUTING
2012-02-23 12:19:44.021687 [DEBUG] switch_ivr_originate.c:66 (sofia/internal/9935551212@fxoports1to4.quietfountain.com) State Change CS_ROUTING -> CS_CONSUME_MEDIA

2012-02-23 12:19:44.021687 [DEBUG] switch_core_session.c:1175 Send signal sofia/internal/9935551212@fxoports1to4.quietfountain.com [BREAK]
2012-02-23 12:19:44.021687 [DEBUG] switch_core_state_machine.c:410 (sofia/internal/9935551212@fxoports1to4.quietfountain.com) State ROUTING going to sleep
2012-02-23 12:19:44.021687 [DEBUG] switch_core_state_machine.c:362 (sofia/internal/9935551212@fxoports1to4.quietfountain.com) Running State Change CS_CONSUME_MEDIA

2012-02-23 12:19:44.021687 [DEBUG] switch_core_state_machine.c:429 (sofia/internal/9935551212@fxoports1to4.quietfountain.com) State CONSUME_MEDIA
2012-02-23 12:19:44.021687 [DEBUG] switch_core_state_machine.c:429 (sofia/internal/9935551212@fxoports1to4.quietfountain.com) State CONSUME_MEDIA going to sleep
2012-02-23 12:19:44.021687 [DEBUG] switch_core_session.c:870 Send signal sofia/internal/9935551212@fxoports1to4.quietfountain.com [BREAK]
send 1397 bytes to udp/[192.168.29.55]:5060 at 18:19:44.034612:
  ------------------------------------------------------------------------
  INVITE sip:9935551212@fxoports1to4.quietfountain.com SIP/2.0
  Via: SIP/2.0/UDP 192.168.29.1;rport;branch=z9hG4bKQKjKXKZBmD1Sr
   Max-Forwards: 69
   From: "Net Ops Desk L1" <sip:x011@192.168.29.1>;tag=3F61avHXm0t2K
   To: <sip:9935551212@fxoports1to4.quietfountain.com>
   Call-ID: cd0d8ada-d8ed-122f-669c-3fb68015248b
   CSeq: 24674528 INVITE
   Contact: <sip:mod_sofia@192.168.29.1:5060>
   User-Agent: FreeSWITCH-mod_sofia/1.0.head-git-7f17ad7 2011-10-01 14-05-14 +0200
   Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, UPDATE, INFO, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE
   Supported: timer, precondition, path, replaces
   Allow-Events: talk, hold, presence, dialog, line-seize, call-info, sla, include-session-description, presence.winfo, message-summary, refer
   Privacy: none
   Content-Type: application/sdp
   Content-Disposition: session
   Content-Length: 445
   X-FS-Support: update_display
   P-Asserted-Identity: "Net Ops Desk L1" <sip:x011@192.168.29.1>
   v=0
   o=011 8004 8000 IN IP4 192.168.29.57
   s=SIP Call
   c=IN IP4 192.168.29.57
   t=0 0
   m=audio 5012 RTP/AVP 0 8 4 18 112 97 103 102 101
   a=rtpmap:0 PCMU/8000
   a=rtpmap:8 PCMA/8000
   a=rtpmap:4 G723/8000
   a=rtpmap:18 G729/8000
   a=fmtp:18 annexb=no
   a=rtpmap:112 G726-32/8000
   a=rtpmap:97 iLBC/8000
   a=fmtp:97 mode=20
   a=rtpmap:103 AAL2-G726-40/8000
   a=rtpmap:102 G729E/8000
   a=rtpmap:101 telephone-event/8000
   a=fmtp:101 0-16,32-36,54
   a=ptime:20
   ------------------------------------------------------------------------


2012-02-23 12:19:44.021687 [DEBUG] sofia.c:5174 Channel sofia/internal/9935551212@fxoports1to4.quietfountain.com entering state [calling][0]
 recv 353 bytes from udp/[192.168.29.55]:5060 at 18:19:44.040757:
  ------------------------------------------------------------------------

  SIP/2.0 100 Trying
  Via: SIP/2.0/UDP 192.168.29.1;rport;branch=z9hG4bKQKjKXKZBmD1Sr
  From: "Net Ops Desk L1" <sip:x011@192.168.29.1>;tag=3F61avHXm0t2K
  To: <sip:9935551212@fxoports1to4.quietfountain.com>
  Call-ID: cd0d8ada-d8ed-122f-669c-3fb68015248b
  CSeq: 24674528 INVITE
  User-Agent: Grandstream GXW4104 (HW 1.0, Ch:2) 1.3.4.10
  Content-Length: 0
  ------------------------------------------------------------------------

SNOOZE WITH UNWELCOME SILENCE.....


recv 503 bytes from udp/[192.168.29.55]:5060 at 18:19:54.350776:
  ------------------------------------------------------------------------

  SIP/2.0 180 Ringing
  Via: SIP/2.0/UDP 192.168.29.1;rport;branch=z9hG4bKQKjKXKZBmD1Sr
  From: "Net Ops Desk L1" <sip:x011@192.168.29.1>;tag=3F61avHXm0t2K
  To: <sip:9935551212@fxoports1to4.quietfountain.com>;tag=7be5ae114be4f046
  Call-ID: cd0d8ada-d8ed-122f-669c-3fb68015248b
  CSeq: 24674528 INVITE
  User-Agent: Grandstream GXW4104 (HW 1.0, Ch:2) 1.3.4.10
  Contact: <sip:192.168.29.55:5060;transport=udp>
  Allow: INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK
  Content-Length: 0

  ------------------------------------------------------------------------
2012-02-23 12:19:54.332358 [DEBUG] switch_core_session.c:870 Send signal sofia/internal/9935551212@fxoports1to4.quietfountain.com [BREAK]
2012-02-23 12:19:54.332358 [DEBUG] switch_core_session.c:870 Send signal sofia/internal/9935551212@fxoports1to4.quietfountain.com [BREAK]
2012-02-23 12:19:54.353976 [DEBUG] sofia.c:5174 Channel sofia/internal/9935551212@fxoports1to4.quietfountain.com entering state [proceeding][180]
2012-02-23 12:19:54.353976 [NOTICE] sofia.c:5253 Ring-Ready sofia/internal/9935551212@fxoports1to4.quietfountain.com!
2012-02-23 12:19:54.353976 [NOTICE] mod_sofia.c:2393 Ring-Ready sofia/internal/011@gate.quietfountain.com!

recv 797 bytes from udp/[192.168.29.55]:5060 at 18:19:54.362180:
  ------------------------------------------------------------------------
  SIP/2.0 200 OK
  Via: SIP/2.0/UDP 192.168.29.1;rport;branch=z9hG4bKQKjKXKZBmD1Sr
  From: "Net Ops Desk L1" <sip:x011@192.168.29.1>;tag=3F61avHXm0t2K
  To: <sip:9935551212@fxoports1to4.quietfountain.com>;tag=7be5ae114be4f046
  Call-ID: cd0d8ada-d8ed-122f-669c-3fb68015248b
  CSeq: 24674528 INVITE
  User-Agent: Grandstream GXW4104 (HW 1.0, Ch:2) 1.3.4.10
  Contact: <sip:192.168.29.55:5060;transport=udp>
  Allow: INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK
  Content-Type: application/sdp
  Supported: replaces, timer, 100rel, path
  Content-Length: 224
  v=0
  o=system 8002 8000 IN IP4 192.168.29.55
  s=SIP Call
  c=IN IP4 192.168.29.55
  t=0 0
  m=audio 5012 RTP/AVP 0 8 4 18 3 101
  a=sendrecv
  a=rtpmap:0 PCMU/8000
  a=ptime:20
  a=rtpmap:101 telephone-event/8000
  a=fmtp:101 0-11

  ------------------------------------------------------------------------

2012-02-23 12:19:54.353976 [DEBUG] switch_core_session.c:870 Send signal sofia/internal/9935551212@fxoports1to4.quietfountain.com [BREAK]
2012-02-23 12:19:54.353976 [DEBUG] switch_core_session.c:870 Send signal sofia/internal/9935551212@fxoports1to4.quietfountain.com [BREAK]
2012-02-23 12:19:54.353976 [DEBUG] switch_core_session.c:724 Send signal sofia/internal/011@gate.quietfountain.com [BREAK]
2012-02-23 12:19:54.353976 [NOTICE] switch_ivr_originate.c:481 Ring Ready sofia/internal/011@gate.quietfountain.com!



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