AudioCodes Mediant 500 MSBR, User Manual

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Version 7.2 443 Mediant 500 MSBR
User's Manual 23. Coders and Profiles
Tel Profile Parameter Global Parameter

[1] Enable = When enabled, the feature operates as
follows:
a. A Tel-to-IP call is established (connected) by the
device for a B-channel.
b. The device receives a SIP BYE (i.e., IP side ends the
call) and plays a reorder tone to the PSTN side for
the duration configured by the
CutThroughTimeForReOrderTone parameter. The
device releases the call towards the IP side (sends a
SIP 200 OK).
c. The PSTN side, for whatever reason, remains off-
hook.
d. If a new IP call is received for this B-channel after the
reorder tone has ended, the device “cuts through” the
channel and connects the call immediately (despite
the B-channel being in physical off-hook state)
without playing a ring tone. If an IP call is received
while the reorder tone is played, the device rejects
the call.
Note:

If the parameter is disabled and the PSTN side remains
in off-hook state after the IP call ends the call, the device
releases the call after 60 seconds.

A special CAS table can be used to report call status
events (Active/Idle) to the PSTN side during Cut Through
mode (see Configuring CAS State Machines on page
465).

The corresponding global parameter is
DigitalCutThrough.
Call Priority Mode
call-priority-mode
[TelProfile_CallPriorityMode]
Defines call priority handling.

[0] Disable (default).

[1] MLPP = Enables MLPP Priority Call handling. 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 = Enables 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 belonging 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 Phone 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 configured by the EmergencyNumbers
parameter. (For E911, you must configure the