M-Key Control From Telephone Network; Transmit ' ' And '#' From Alphacom; Voice Switching In Noisy Environment; Country Settings - Stentofon AudioCodes MP-114 Configuration Manual

A100K10333 v.5.5

6.3 M-key Control from Telephone Network

The ' ' and '#' buttons on the telephone can be used to control M-key
function (simplex audio) ON or OFF:
Press the ' '-key briefly and the M-key is turned ON
Press the '#'-key briefly and the M-key is turned OFF
This can be useful for group call announcement from the telephone.
The feature is enabled by setting 1
Protocol Management > Protocol Definition > DTMF & Dialing.

6.4 Transmit ' ' and '#' from AlphaCom

The DTMF signals ' ' and '#' will be transmitted to the line when DAK 0
( ) and DAK 1 (#) is pressed during a telephone conversation. No
programming is required.

6.5 Voice Switching in Noisy Environment

If the intercom station is located in a noisy environment, it might be
difficult to switch the voice direction from the telephone towards the
intercom station. However, there is a setting in the AlphaCom to
overcome this problem. In AlphaPro, Exchange & System > System >
VoIP, set the parameter Optimized voice duplex control when
conversation with SIP trunk/stations
When this flag is set, the initial voice direction is forced to be from the
intercom towards the telephone. When the phone operator starts to
speak, the voice direction will switch towards the intercom station,
regardless of the level of the audio signal from the intercom station. As
soon as the phone operator stops speaking, the voice direction will
switch back to the initial direction.
Make sure that the Echo Canceller is enabled in the SIP Gateway.
(Configuration tab > Media Settings menu > Voice Settings page
item > Echo Canceller = Enabled).

6.6 Country Settings

The Line Characteristics (AC impedance matching, hybrid balance, Tx &
Rx frequency response, Tx & Rx Gains, ring detection threshold, DC
characteristics) should be set according to country of origin.
Some of the SIP Gateway parameters are configurable through the ini
configuration file only (and not via the Web). The CountryCoefficients
parameter that determines the line characteristics must be configured
via the ini configuration file.
Procedure to modify the ini file:
Configuration Guide
AudioCodes MP-114/118
st
Tx DTMF Option to INFO(Cisco) in
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