AudioCodes Mediant 3000, User Manual

Page: 760 / 872

User's Manual 760 Document #: LTRT-89729
Mediant 3000
Parameter Description

The suspension of the INVITE message occurs for all calls.

This parameter is applicable to QSIG.
Web: IP2IP Transfer
Mode
[IP2IPTransfermode]
Determines the interworking of incoming mid-call SIP REFER messages
to outgoing REFER messages, for calls pertaining to the IP-to-IP
application.

[0] Disable = (Default) Upon receipt of a REFER message, the device
sends an INVITE to the refer-to destination with or without the
Replaces header.

[1] Enable = Upon receipt of a REFER message, the device forwards
the REFER message and all relevant SIP messages from and to the
transferor, to the target destination during call transfer. For
consultation call transfer, the REFER message contains a 'replaces'
parameter in the Refer-To header. In this case, the outgoing REFER
also contains a 'replaces' parameter in the Refer-To header.
Note: This parameter is applicable to blind and consultation call
transfers.
53.11.5.6 MLPP and Emergency Call Parameters
The Multilevel Precedence and Preemption (MLPP) and emergency E911 call parameters
are described in the table below.
MLPP and Emergency E911 Call Parameters
Parameter Description
Web/EMS: Call Priority
Mode
[CallPriorityMode]
Enables priority call handling for all calls.

[0] Disable (default).

[1] MLPP = MLPP Priority Call handling is enabled. MLPP prioritizes
call handling whereby the relative importance of various kinds of
communications is strictly defined, allowing higher precedence
communication at the expense of lower precedence
communications. Higher priority calls override less priority calls
when, for example, congestion occurs in a network.

[2] Emergency = Preemption of IP-to-Tel E911 emergency calls. If
the device receives an E911 call and there are unavailable channels
to receive the call, the device terminates one of the channel calls
and sends the E911 call to that channel. The preemption is done
only on a channel pertaining to the same Trunk Group for which the
E911 call was initially destined and if the channel select mode
(configured by the ChannelSelectMode parameter) is set to other
than “By Dest Number” (0). The preemption is done only if the
incoming IP-to-Tel call is identified as an emergency call. The device
identifies emergency calls by one of the following:

The destination number of the IP call matches one of the
numbers defined by the EmergencyNumbers parameter. (For
E911, you must define this parameter with the value "911".)

The incoming SIP INVITE message contains the “emergency”
value in the Priority header.
Notes:

This parameter is applicable to CAS, and ISDN.

MLPP and Emergency services can also be configured in a Tel
Profile.