Specifications

234 IBM Voice Over Frame Relay Perform Guide
Tx Level
Format:vvptxl
Selects transmission attenuation (or gain) level (l)
for voice port vp. Tx level: (-16)-(+ 7) dB in 0.5-dB
increments. Default: DVFAX card: 0.0; AVFAX card:
-4.0.
VAD Hangtime
Format:vvpvaht
Specifies the time (t) in milliseconds after speech
has ended when Voice Activity Detector (VAD)
silence suppression begins for voice port vp.
Hangtime: 0-225-3825.
VAD Mode
Format:vvpvamm
Specifies the Voice Activity Detect (VAD)
operational mode for voice port vp. Operational
mode (m): a: Adaptive. IBM 9783 unit dynamically
selects VAD threshold f: Fixed. VAD threshold
assigned to fixed value via VAD Threshold_fixed
command, or n: No VAD. VAD disabled
VAD Threshold_
fixed
Format:vvpvatl
Specifies a fixed threshold level (l) in dBm0 for voice
port vp. This command applies to voice ports that
have been configured to the fixed VAD threshold
mode. Threshold level: (0)-(-36)-(-45)
Vocoder
Format:vvpvoa
Specifies the compression algorithm (a) to be used
by voice port vp and set the algorithm operating
mode (m). Algorithm: G729, e (ECELP), G728 or
NONE (for fax-only transmission).