Aastra 9143i Series Administrator's Manual page 993

Parameter –
handsfree tx gain
Description
Format
Default Value
Range
Example
41-001160-04 Rev 02, Release 2.5
Operational, Basic, and Advanced Parameters
Configuration Files
This is the increased (+db) or decreased (-db) amount of signal
transmitted from the base microphone to the far-end party. The amount of
Tx gain in the IP phone firmware has been reduced to avoid side-tone and
echo on the local and far-end equipment. This parameter allows you to
adjust the Tx gain settings to best suit your comfort level and deployment
environment.
Note: The example below increases the speakerphone mic transmit gain
by 10 db.
Integer
0
-10 db to +10 db
handsfree tx gain: 10
aastra.cfg, <mac>.cfg
A-207