AWB OD200-IDU, Руководство оператора

Страница: 75 / 114

Call Block Setting
7-9
7
• G729ab: The ITU-T G.729ab standard codec that uses Conjugate Structure
Algebraic-Code Excited Linear Prediction (CS-ACELP) with silence suppression to
produce a low-bandwidth data stream of 8 Kbps. Note that DTMF and fax tones do
not transport reliably with this codec, it is better to use G.711 for these signals.
• G726-16/24/32/40: The ITU-T G.726 standard codecs that use Adaptive
Differential Pulse Code Modulation (ADPCM) to produce good-quality,
low-bandwidth data streams of either 16, 24, 32, or 40 Kbps.
Priority Codec List – The OD200 automatically negotiates the codec to use for
each called party. You can specify a priority for the codecs that you prefer to use. For
example, you may want to use a low-bandwidth codec such as G729ab instead of a
high-bandwidth G711 codec. Select a codec in the list, then use the UP and DOWN
buttons to set the priority. The OD200 attempts to use the codec highest in the list
before trying the next lower one.
Call Block Setting
The OD200 can block certain incoming and outgoing phone numbers from making
calls through the unit. You can specify up to 15 incoming and 15 outgoing numbers
to block.
Figure 7-6 Call Block Setting
Phone – Selects either VoIP port PHONE1 or PHONE2.
Outgoing – Blocks outgoing calls from the listed numbers. (Valid characters 0-9)
Incoming – Blocks incoming calls from the listed numbers. (Valid characters 0-9)