[Freeswitch-dev] Hook-Flash passthrough/translation FXS->FXO
Jeroen C. van Gelderen
jeroeng at thegreek.com
Thu Jun 17 16:06:54 PDT 2010
Hi Guys,
[In short: can someone knowledgeable confirm the small patch below for
hook-flash support uses correct locking? Is there a better approach?]
I am taking 16 CENTREX (analog) lines from our telco and passing each
through a Freeswitch instance to 16 analog handsets in order to enable call
recording. I'm using a Xorcom device with 16 FXS and 16 FXO ports and I'm
basically bridging these ports together one-to-one.
Since this setup exists side-by-side with 100 "unadorned" CENTREX lines it
is important that the clerks don't have to learn a second way of
transferring calls for some percentage of the stations.
Calls on CENTREX lines are transferred by pressing
<hook flash> # <digit> <digit> (i.e. <flash>#42)
DTMF digits can be made to pass through in-band just fine (modulo a feedback
issue that I'm still working on but have patched around for now) but the
hook flash support is only half-way present.
Freeswitch already supports the artificial DTMF digit "F" will allow you to
queue it on a channel to effect a hook flash. It does not yet allow
detection of the hook-flash on the FXS to result in digit "F" being queued.
I'm running with the following (hack alert) patch to make this work. I'm
considering tying this to a knob called flash2dtmf or similar.
----8<----8<----8<----8<----8<----8<----8<----
@@ -1746,6 +1750,31 @@ static ZIO_SIGNAL_CB_FUNCTION(on_fxs_signal)
zap_set_flag_locked(sigmsg->channel,
ZAP_CHANNEL_HOLD);
zap_set_state_locked(sigmsg->channel, ZAP_CHANNEL_STATE_DIALTONE);
}
+ } else {
+ switch_core_session_t *session;
+ switch_dtmf_t _dtmf = { 'F',
SWITCH_DEFAULT_DTMF_DURATION };
+
+ zap_log(ZAP_LOG_DEBUG, "HERE BE CUSTOM FLASH
HANDLING...\n");
+
+ if ((session =
zap_channel_get_session(sigmsg->channel, 0))) {
+
+ zap_log(ZAP_LOG_DEBUG, "Got a
session...\n");
+
+ channel =
switch_core_session_get_channel(session);
+
+ zap_log(ZAP_LOG_DEBUG, "Got a
channel...\n");
+
+ switch_channel_queue_dtmf(channel,
&_dtmf);
+
+ zap_log(ZAP_LOG_DEBUG, "Queued DTMF
[F]...\n");
+
+
switch_core_session_rwunlock(session);
+
+ zap_log(ZAP_LOG_DEBUG, "Unlocked
session...\n");
+ }
+
+ zap_log(ZAP_LOG_DEBUG, "END OF CUSTOM FLASH
HANDLING.\n");
+
}
}
----8<----8<----8<----8<----8<----8<----8<----
A log excerpt of a clerk taking an inbound call (14sec) and then using
hook-flash to transfer the call to extension #42:
----8<----8<----8<----8<----8<----8<----8<----
2010-06-15 18:12:33.435334 [NOTICE] mod_openzap.c:1612 Channel
[OpenZAP/1:1/] has been answered
2010-06-15 18:12:33.451333 [DEBUG] switch_core_codec.c:146 OpenZAP/3:1/1001
Restore previous codec PCMU:0.
2010-06-15 18:12:33.451333 [DEBUG] switch_ivr_originate.c:3230 Originate
Resulted in Success: [OpenZAP/1:1/]
2010-06-15 18:12:33.451333 [DEBUG] switch_ivr_originate.c:3230 Originate
Resulted in Success: [OpenZAP/1:1/]
2010-06-15 18:12:33.451333 [DEBUG] switch_core_session.c:643 Send signal
OpenZAP/1:1/ [BREAK]
2010-06-15 18:12:33.451333 [DEBUG] switch_core_session.c:643 Send signal
OpenZAP/3:1/1001 [BREAK]
2010-06-15 18:12:33.451333 [DEBUG] switch_ivr_bridge.c:1182 (OpenZAP/1:1/)
State Change CS_CONSUME_MEDIA -> CS_EXCHANGE_
MEDIA
2010-06-15 18:12:33.451333 [DEBUG] switch_core_session.c:1023 Send signal
OpenZAP/1:1/ [BREAK]
2010-06-15 18:12:33.451333 [DEBUG] switch_core_state_machine.c:314
(OpenZAP/1:1/) Running State Change CS_EXCHANGE_MEDIA
2010-06-15 18:12:33.451333 [DEBUG] switch_core_state_machine.c:351
(OpenZAP/1:1/) State EXCHANGE_MEDIA
2010-06-15 18:12:33.451333 [DEBUG] mod_openzap.c:595 CHANNEL EXCHANGE_MEDIA
2010-06-15 18:12:33.455333 [DEBUG] switch_core_session.c:704 Send signal
OpenZAP/1:1/ [BREAK]
2010-06-15 18:12:33.455333 [DEBUG] switch_core_session.c:704 Send signal
OpenZAP/3:1/1001 [BREAK]
2010-06-15 18:12:47.543864 [DEBUG] ozmod_analog.c:801 EVENT [FLASH][1:1]
STATE [UP]
2010-06-15 18:12:47.543864 [DEBUG] mod_openzap.c:1605 got FXS sig [FLASH]
2010-06-15 18:12:47.543864 [DEBUG] mod_openzap.c:1757 HERE BE CUSTOM FLASH
HANDLING...
2010-06-15 18:12:47.543864 [DEBUG] mod_openzap.c:1761 Got a session...
2010-06-15 18:12:47.543864 [DEBUG] mod_openzap.c:1765 Got a channel...
2010-06-15 18:12:47.543864 [DEBUG] mod_openzap.c:1769 Queued DTMF [F]...
2010-06-15 18:12:47.543864 [DEBUG] mod_openzap.c:1773 Unlocked session...
2010-06-15 18:12:47.543864 [DEBUG] mod_openzap.c:1776 END OF CUSTOM FLASH
HANDLING.
2010-06-15 18:12:47.570863 [DEBUG] zap_io.c:2062 3:1 GENERATE DTMF [F]
2010-06-15 18:12:49.554796 [DEBUG] mod_openzap.c:724 queue DTMF [#]
2010-06-15 18:12:49.570795 [DEBUG] zap_io.c:2062 3:1 GENERATE DTMF [#]
2010-06-15 18:12:49.774789 [DEBUG] mod_openzap.c:784 Dropping frame! (write
not ready)
2010-06-15 18:12:50.194774 [DEBUG] mod_openzap.c:724 queue DTMF [4]
2010-06-15 18:12:50.230773 [DEBUG] zap_io.c:2062 3:1 GENERATE DTMF [4]
2010-06-15 18:12:50.314771 [DEBUG] mod_openzap.c:722 Ignoring DTMF [4] on
FXO port 3:1
2010-06-15 18:12:50.414767 [DEBUG] mod_openzap.c:784 Dropping frame! (write
not ready)
2010-06-15 18:12:50.794755 [DEBUG] mod_openzap.c:724 queue DTMF [2]
2010-06-15 18:12:50.830753 [DEBUG] zap_io.c:2062 3:1 GENERATE DTMF [2]
2010-06-15 18:12:50.915750 [DEBUG] mod_openzap.c:722 Ignoring DTMF [2] on
FXO port 3:1
2010-06-15 18:12:51.013748 [DEBUG] mod_openzap.c:784 Dropping frame! (write
not ready)
2010-06-15 18:13:29.244471 [DEBUG] ozmod_analog.c:801 EVENT [ONHOOK][1:1]
STATE [UP]
2010-06-15 18:13:29.244471 [DEBUG] ozmod_analog.c:837 Changing state on 1:1
from UP to DOWN
2010-06-15 18:13:29.262471 [DEBUG] ozmod_analog.c:463 Executing state
handler on 1:1 for DOWN
2010-06-15 18:13:29.262471 [DEBUG] mod_openzap.c:1605 got FXS sig [STOP]
2010-06-15 18:13:29.262471 [DEBUG] switch_channel.c:2257 (OpenZAP/1:1/)
Callstate Change ACTIVE -> HANGUP
2010-06-15 18:13:29.262471 [NOTICE] mod_openzap.c:1696 Hangup OpenZAP/1:1/
[CS_EXCHANGE_MEDIA] [NORMAL_CLEARING]
2010-06-15 18:13:29.262471 [DEBUG] switch_channel.c:2273 Send signal
OpenZAP/1:1/ [KILL]
2010-06-15 18:13:29.262471 [DEBUG] switch_core_session.c:1023 Send signal
OpenZAP/1:1/ [BREAK]
----8<----8<----8<----8<----8<----8<----8<----
Cheers,
-Slim
--
Jeroen C. "Slim" van Gelderen
Olympic Sports Data Services
Email: jeroeng at thegreek.com
Phone: +1 876 953 6182 x128
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