AudioCodes Mediant 2000 User Manual

User's Manual 618 Document #: LTRT-68822
Mediant 2000
45.11.5.7 Call Cut-Through Parameters
The call cut-through parameters are described in the table below.
Call Cut-Through Parameters
Parameter Description
[DigitalCutThrough]
Enables PSTN CAS channels/endpoints to receive incoming IP calls even
if the B-channels are in off-hook state.
 [0] Disabled (default)
 [1] Enabled
When enabled, this feature operates as follows:
4 A Tel-to-IP call is established (connected) by the device for a B-
channel.
5 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 set by the
CutThroughTimeForReOrderTone parameter. The device releases the
call towards the IP side (sends a SIP 200 OK).
6 The PSTN side, for whatever reason, remains off-hook.
7 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.
Notes:
 If this 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.
 This feature can also be configured in a Tel Profile and therefore,
assigned to specific B-channels that use specific CAS tables.
45.11.5.8 TTY/TDD Parameters
The TTY (telephone typewriter) or telecommunications device for the deaf (TDD) is an
electronic device for text communication via a telephone line for those with impaired
hearing. The TTY/TDD parameters are described in the table below.
TTY Parameters
Parameter Description
EMS: TTY Transport Type
[TTYTransportType]
Defines the device's transferring method of TTY signals during a
call.
 [0] = (Default) Disable.
 [2] = Relay (signals sent over the EVRC codec) - TTY phone
device transfer using In-Band Relay mode for TTY signal
transport.
Note: To support TTY Relay (2), you must configure the device to
use the EVRC coder.

AudioCodes Mediant 2000 Specifications

General

Brand	AudioCodes
Model	Mediant 2000
Category	Gateway
Language	English