Aastra Telecom SIP 480I - Manual (Page 376)

Operational, Basic, and Advanced Parameters
A-86 41-001129-00 Rev 09, Release 1.4.1
IP Phone Administrator Guide
Appendix A
Parameter –
handset tx gain Configuration Files aastra.cfg, <mac>.cfg
Description This is the increased (+db) or decreased (-db) amount of signal
transmitted from the handset 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.
Format Integer
Default Value 0
Range -10 db to +10 db
Example handset tx gain: -5
Parameter –
handset sidetone gain Configuration Files aastra.cfg, <mac>.cfg
Description This is the increased (+db) or decreased (-db) amount of sidetone signal
from the handset microphone to the handset speaker. The amount of
sidetone 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 sidetone gain settings to best suit your comfort
level and deployment environment.
Format Integer
Default Value 0
Range -10 db to +10 db
Example handset sidetone gain: -1