User`s manual

SIP User's Manual 412 Document #: LTRT-83303
Mediant 1000 & Mediant 600
7.3.2.4 FXO Supplementary Services
The FXO supplementary services include the following:
 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 device sends the hook-flash to the Tel side by performing 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 device 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.
7.4 Event Notification using X-Detect Header
The device 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.
For supporting some events, certain device configurations need to be performed. The table
below lists the support event types (and subtypes) and the corresponding device
configurations, if required:
Table 7-1: Supported X-Detect Event Types
Events
Type Subtype
Required Configuration
CPT SIT SITDetectorEnable = 1
UserDefinedToneDetectorEnable = 1
CED (IsFaxUsed ≠ 0) or (IsFaxUsed = 0, and FaxTransportMode ≠ 0) FAX
modem VxxModemTransportType = 3
PTT voice-start
voice-end
EnableDSPIPMDetectors = 1