Citel 6000 Guía Del Usuario
PBXgateway
™
& EXTender
TM
6000 System Administrator’s Guide
216
Voice Compression
The PBXgateway deploys voice compression in order to extend multiple users across fewer data
channels. The PBXgateway supports the following voice compression algorithms: 32 Kbps ADPCM, 24
Kbps ADPCM and G.729A. Depending on the voice compression algorithm selected, you may need
anywhere from 16 Kbps (G.729A) up to 40 Kbps (ADPCM 32) per user.
channels. The PBXgateway supports the following voice compression algorithms: 32 Kbps ADPCM, 24
Kbps ADPCM and G.729A. Depending on the voice compression algorithm selected, you may need
anywhere from 16 Kbps (G.729A) up to 40 Kbps (ADPCM 32) per user.
Compression Algorithms vs. Corresponding Bandwidth Size
G.711
ADPCM 32
ADPCM 24
G.729A
64 (72) Kbps
32 (40) Kbps
24 (32) Kbps
8 (16) Kbps
( ) Maximum value of the combined compression bandwidth and the signaling between the Switch and
Remote units. This number reflects both parties talking simultaneously in a voice conversation.
Under normal conditions, this number will be lower
Under normal conditions, this number will be lower
.
Using the bandwidth management formula on the next page, you can determine the total bandwidth
necessary to support your application. If you have excess bandwidth on your network circuit, your
network terminating devices could allow you to use that bandwidth to connect to a router or even another
PBXgateway. In order to accomplish this, you must have the multi-port capability on your CSU/DSU. For
more information on your network terminating devices, please see the Network Terminating Equipment
section of the Quick Installation Guide.