Version 6.6 527 MP-11x & MP-124
User's Manual 43. Configuration Parameters Reference
Parameter Description
This parameter is typically implemented for incoming IP-to-Tel collect
calls to the FXS port. If the FXS user does not wish to accept the collect
call, the user disconnects the call by on-hooking the phone. The device
notifies the softswitch (or Application server) of the unanswered collect
call (on-hook) by sending a SIP INFO message. As a result, the
softswitch disconnects the call (sends a BYE message to the device). If
the call is a regular incoming call and the FXS user on-hooks the phone
without intending to disconnect the call, the softswitch does not
disconnect the call (during the regret time).
The INFO message format is as follows:
INFO sip:12345@10.50.228.164:5082 SIP/2.0
Via: SIP/2.0/UDP 127.0.0.1;branch=z9hG4bK_05_905924040-90579
From:
<sip:+551137077803@ims.acme.com.br:5080;user=phone>;tag=008
277765
To: <sip:notavailable@unknown.invalid>;tag=svw-0-1229428367
Call-ID: ConorCCR-0-LU-1229417827103300@dtas-
stdn.fs5000group0-000.l
CSeq: 1 INFO
Contact: sip:10.20.7.70:5060
Content-Type: application/On-Hook (application/Off-Hook)
Content-Length: 0
Notes:
 This parameter is applicable only if the parameter RegretTime is
configured.
 This parameter is applicable only to FXS interfaces.
Web: PSTN Alert Timeout
EMS: Trunk PSTN Alert
Timeout
[PSTNAlertTimeout]
Defines the Alert Timeout (in seconds) for calls to the Tel side. This
timer is used between the time a ring is generated (FXS) or a line is
seized (FXO), until the call is connected. For example: If the FXS device
receives an INVITE, it generates a ring to the phone and sends a SIP
180 Ringing response to the IP. If the phone is not answered within the
time interval set by this parameter, the device cancels the call by
sending a SIP 408 response.
The valid value range is 1 to 600 (in seconds). The default is 180.
Web/EMS: RTP Only
Mode
[RTPOnlyMode]
Enables the device to send and receive RTP packets to and from
remote endpoints without the need to establish a SIP session. The
remote IP address is determined according to the Outbound IP Routing
table (Prefix parameter). The port is the same port as the local RTP port
(configured by the BaseUDPPort parameter and the channel on which
the call is received).
 [0] Disable (default)
 [1] Transmit & Receive = Send and receive RTP packets.
 [2] Transmit Only= Send RTP packets only.
 [3] Receive Only= Receive RTP packets only.
Notes:
 To configure the RTP Only mode per trunk, use the
RTPOnlyModeForTrunk_ID parameter.
 If per trunk configuration (using the RTPOnlyModeForTrunk_ID
parameter) is set to a value other than the default, the
RTPOnlyMode parameter value is ignored.
Web/EMS: SIT Q850
Defines the Q.850 cause value specified in the SIP Reason header that
is included in a 4xx response when a Special Information Tone (SIT) is
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