Ring Detection Timeout; Fxo Supplementary Services; Event Notification Using X-Detect Header - AudioCodes MP-124 User Manual

7.3.2.3
7.3.2.4
7.4
SIP User's Manual
http://ArtTel.ru

Ring Detection Timeout

The ini file parameters IsWaitForDialTone and WaitForDialTone apply to Ring Detection
Timeout. The operation of Ring Detection Timeout depends on the following:
No automatic dialing and Caller ID is enabled: if the second ring signal doesn't arrive
for Ring Detection Timeout, the gateway doesn't initiate a call to the IP.
Automatic dialing is enabled: if the remote party doesn't answer the call, and the
ringing signal stops for Ring Detection Timeout, the FXO releases the IP call.
Ring Detection Timeout supports full ring cycle of ring on and ring off (from ring start to ring
start).

FXO Supplementary Services

Hold / Transfer toward the Tel side
The ini file parameter LineTransferMode must be set to 0 (default).
If the FXO receives a hook-flash from the IP side (using out-of-band or RFC 2833), the
gateway sends the hook-flash to the Tel side by one of the following:
•
Performing a hook flash (i.e., on-hook and off-hook)
•
Sending a hook-flash code (defined by the ini file parameter HookFlashCode)
The PBX may generate a dial tone that is sent to the IP, and the IP side may dial digits
of a new destination.
Blind Transfer to the Tel side
A blind transfer is one in which the transferring phone connects the caller to a
destination line before ringback begins. The ini file parameter LineTransferMode must
be set to 1.
The blind transfer call process is as follows:
•
FXO receives a REFER request from the IP side
•
FXO sends a hook-flash to the PBX, dials the digits (that are received in the
Refer-To header), and then drops the line (on-hook). Note that the time between
flash to dial is according to the WaitForDialTime parameter.
•
PBX performs the transfer internally
Hold / Transfer toward the IP side
The FXO gateway doesn't initiate hold / transfer as a response to input from the Tel
side. If the FXO receives a REFER request (with or without replaces), it generates a
new INVITE according to the Refer-To header.

Event Notification using X-Detect Header

The gateway supports the sending of notifications to a remote party notifying the
occurrence (or detection) of certain events on the media stream. Event detection and
notifications is performed using the X-Detect SIP message header, and only when
establishing a SIP dialog.
338
MediaPack Series
Document #: LTRT-65409