VOIP-500
Series Phone
Configuration and Operation Manual
Page
22
of
90
Copyright 2012 Talk-A-Phone Co.
• 7530 North Natchez Avenue • Niles, Illinois 60714 • Phone 773.539.1100 • [email protected] • www.talkaphone.com.
All prices and specifications are subject to change without notice. Talk-A-Phone, Scream Alert, WEBS and WEBS Contact are registered trademarks of Talk-A-Phone Co. All rights reserved.
2.
Check or uncheck
VAD/CNG
,
AEC
, or
AGC
to enable/disable the audio processing modules.
VAD/CNG
(Voice Activity Detection / Comfort Noise Generation) is enabled by default. VAD/CNG is
used to reduce background noise and also produces as low but audible comfort noise.
AEC
(Acoustic Echo Cancellation) is enabled by default. AEC is used to remove the echo from voice
communications in a speakerphone environment.
AGC
(Automatic Gain Control) is disabled by default. AGC can be used where audio input levels
vary widely in an effort to enhance/reduce the audio input to the phone.
3.
Select the Outbound DTMF
2
duration of
51 msec
,
60 msec
,
102 msec
, or
Custom
to be used for sending
DTMF packets during a call. Select
Disable
if Outbound DTMF is not required. This configuration option is
only available for a device mode with a “K” designator (e.g., 1BKH, 4BH
SK).
4.
Click the drop-down menu to select
Line Gain
for the Line Level Output parameter. Each level
increases/decreases the line gain in steps of approximately 3dB.
5.
Enable or disable the
Speaker
and/or
Microphone
. Configuration changes made to the Speaker
parameters will affect the built-in hands-free speaker and the optional handset speaker. Configuration
changes made to the Microphone parameters will affect the built-in hands-free microphone and the
optional handset microphone.
6.
The
Speaker Gain
and the
Microphone Gain
can be individually adjusted. Each level
increases/decreases gain in steps of approximately 3dB.
7.
During an active call, the Speaker/Microphone gains can be adjusted during an active call using DTMF
Operation codes (Refer to Appendix A: Remote Operation Key Codes
–
Quick Reference: Speaker
Enable/Disable and Microphone Enable/Disable). Gain adjustments made via DTMF only takes effect for
the instance of the phone call where the DTMF Operation Code was applied.
8.
Click
Apply
to save settings.
2
Out-of-band RTP
