Specifications

Installation and Configuration Activities 37
9. Ensure that echo canceller, NLP, and tone disabler are enabled. (Normally, all
three of these options are enabled.) The following example enables echo
canceller on voice port V1A:
VOICE_PORTS V1A ECHO_CANC ENABLE
The following example enables NLP on voice port V1A:
VOICE_PORTS V1A ECHO_CANC NLP ENABLE
The following example enables the tone disabler on voice port V1A:
VOICE_PORTS V1A TONE_DISAB ENABLE
10.. Configure vocoder to E-CELP or ATC. (When E-CELP is disabled, ATC is
enabled by default.) E-CELP is sup-ported at rates of 4.8, 7.47, and 9.6 Kbps.
All other rates default to ATC. The following example enables vocoder E-CELP
on voice port V1A:
VOICE_PORTS V1A VOCODER ECELP ENABLE
11.. Set the outbound transmission route rule to a voice port. The following
example sets outbound transmission route rule 0 for voice port V1A:
VOICE_PORTS V1A OUTBOUND_TRANS_RULE 0
12.. If desired, enable silence suppression (white noise when no voice packets
are sent). The choices are:
•NONE
•ADAPTIVE
•FIXED
The following example specifies fixed-level silence suppression for voice port
V1A:
VOICE_PORTS V1A VAD MODE FIXED
13.. Assign a source address (up to 10 digits) to a voice port. The following
example specifies a source address of 11 for voice port V1A:
VOICE_PORTS V1A SOURCE_ADD 11
14.Reset voice ports without disturbing other ports. For example:
RESET V1A
3.3.6 Voice Diagnostics
This section describes some basic tools to use when optimizing or
troubleshooting voice processing.
Digital Milliwatt: A digital milliwatt tone can be enabled, if necessary. To enable a
digital milliwatt tone for voice port V1A, type:
VOICE_PORTS V1A DMW ENABLE
Voice Loopback: A voice loopback can be enabled with the following choices:
•
SUBSCRIBER
• NETWORK
• DISABLE (ends the test)
The following example enables a subscriber loopback for voice port V1A:
VOICE_PORTS V1A LOOPBACK SUBSCRIBER