Test bed configuration:
source gateway (cisco x.y.z.105) ->Asterisk (ooh323, x.y.z.110)->destination gateway (cisco x.y.z.103)

ooh323.conf:
[general]
bindaddr=0.0.0.0
h323id=ObjSysAsterisk
e164=100
callerid=asterisk
gatekeeper=DISABLE
context=GeneralProxy            
disallow=all
allow=gsm
allow=ulaw
dtmfmode=rfc2833

extensions.conf:
[GeneralProxy]
exten => _XXXX.,1,NoOp(GeneralProxy)
exten => _XXXX.,n,Dial(OOH323/${EXTEN}@x.y.z.107,30,o)
exten => _XXXX.,n,Hangup
exten => h,1,NoOp(hangup cause is ${HANGUPCAUSE})

CLI:
---   onNewCallCreated ooh323c_1
+++   onNewCallCreated ooh323c_1
---   ooh323_onReceivedSetup ooh323c_1
---   find_user
+++   find_user
        Adding capabilities to call(incoming, ooh323c_1)
        Adding gsm capability to call(incoming, ooh323c_1)
        Adding g711 ulaw capability to call(incoming, ooh323c_1)
---   configure_local_rtp
+++   configure_local_rtp
+++   ooh323_onReceivedSetup - Determined context GeneralProxy, extension 6781234567
---   setup_rtp_connection
---   find_call
+++   find_call
+++   setup_rtp_connection
--- onAlerting ooh323c_1
---   find_call
+++   find_call
+++ onAlerting ooh323c_1
    -- Executing [6781234567@GeneralProxy:1] NoOp("OOH323/x.y.z.105-a14a", "GeneralProxy") in new stack
    -- Executing [6781234567@GeneralProxy:2] Dial("OOH323/x.y.z.105-a14a", "OOH323/6781234567@x.y.z.107|30|o") in new stack
---   ooh323_request - data 6781234567@x.y.z.107 format 0x2 (gsm)
---   find_peer
+++   find_peer
+++   ooh323_request
---   ooh323_set_peer - OOH323/x.y.z.107-0616
---   ooh323_call- 6781234567@x.y.z.107
---   onNewCallCreated ooh323c_o_1
---   find_call
+++   find_call
setting callid number 4041234567
 Outgoing call x.y.z.107(ooh323c_o_1) - Codec prefs - (gsm|ulaw)
        Adding capabilities to call(outgoing, ooh323c_o_1)
        Adding gsm capability to call(outgoing, ooh323c_o_1)
        Adding g711 ulaw capability to call(outgoing, ooh323c_o_1)
---   configure_local_rtp
+++   configure_local_rtp
+++   onNewCallCreated ooh323c_o_1
+++   ooh323_call
    -- Called 6781234567@x.y.z.107
    -- Nobody picked up in 30000 ms
---   ooh323_hangup
    hanging x.y.z.107
+++   ooh323_hangup
    -- Executing [6781234567@GeneralProxy:3] Hangup("OOH323/x.y.z.105-a14a", "") in new stack
    -- Executing [h@GeneralProxy:1] NoOp("OOH323/x.y.z.105-a14a", "hangup cause is 16") in new stack
---   ooh323_hangup
    hanging x.y.z.105
+++   ooh323_hangup

H323_log:
---------Date 09/19/06---------
15:09:16:579  Signalling IP address is set to 0.0.0.0
15:09:16:580  Listen port number is set to 1720
15:09:16:580  Enabled RFC2833 DTMF capability for end-point
15:09:16:581  H323 listener creation - successful
15:09:16:581  Creating CMD listener at 0.0.0.0:7575
15:09:16:581  CMD listener creation - successful
15:09:16:604  H.323 Endpoint Configuration is as follows:
15:09:16:604    Trace File: /var/log/asterisk/h323_log
15:09:16:604    FastStart - enabled
15:09:16:604    H245 Tunneling - enabled
15:09:16:604    MediaWaitForConnect - disabled
15:09:16:605    AutoAnswer - disabled
15:09:16:605    Terminal Type - 50
15:09:16:605    T35 CountryCode - 1
15:09:16:605    T35 Extension - 0
15:09:16:605    Manufacturer Code - 71
15:09:16:605    ProductID - objsys
15:09:16:606    VersionID - v0.8.2
15:09:16:606    Local signalling IP address - 0.0.0.0
15:09:16:606    H225 ListenPort - 1720
15:09:16:606    CallerID - asterisk
15:09:16:606    Call Establishment Timeout - 60 seconds
15:09:16:606    MasterSlaveDetermination Timeout - 30 seconds
15:09:16:607    TerminalCapabilityExchange Timeout - 30 seconds
15:09:16:607    LogicalChannel  Timeout - 30 seconds
15:09:16:607    Session Timeout - 15 seconds
15:09:25:719  Created a new call (incoming, ooh323c_1)
15:09:25:772  Received SETUP message (incoming, ooh323c_1)
15:09:25:773  Call has tunneling active (incoming,ooh323c_1)
15:09:25:773  FastStart enabled for call(incoming, ooh323c_1)
15:09:25:774  Enabled RFC2833 DTMF capability for (incoming, ooh323c_1) 
15:09:25:775  Receive Channel data type supported
15:09:25:776  Created new logical channel entry (incoming, ooh323c_1)
15:09:25:776  Receive channel of type audio started (incoming, ooh323c_1)
15:09:25:776  Transmit Channel data type supported
15:09:25:777  Created new logical channel entry (incoming, ooh323c_1)
15:09:25:777  Transmit channel of type audio started (incoming, ooh323c_1)
15:09:25:779  Sent Message - CallProceeding (incoming, ooh323c_1)
15:09:25:779  Sent Message - Alerting (incoming, ooh323c_1) 
15:09:25:785  Cmd connection accepted
15:09:25:786  Processing MakeCall command ooh323c_o_1
15:09:25:786  Created a new call (outgoing, ooh323c_o_1)
15:09:25:787  Enabled RFC2833 DTMF capability for (outgoing, ooh323c_o_1) 
15:09:25:788  Parsing destination x.y.z.107
15:09:25:788  Trying to connect to remote endpoint(x.y.z.107:1720) to setup H2250 channel (outgoing, ooh323c_o_1)