Nortel BCM50 Configuration Manual page 532

532 Appendix B Silence suppression
Figure 149 One call on a full-duplex link without silence suppression
Conversation
Tx
Fred here.
Rx
Conversation
Bandwidth used
When silence suppression is enabled, voice packets are only sent when a speaker is talking. When
a voice is being transmitted, it uses the full-rate transmission rate. Since the sender and receiver do
not share the same channel, the peak bandwidth requirement per channel is still equal to the full
transmission rate. The following figure shows the peak bandwidth requirements for one call on a
full-duplex link with silence suppression enabled. The spare bandwidth made available by silence
suppression is used for lower-priority data applications that can tolerate increased delay and jitter.
Figure 150 One call on a full-duplex link with silence suppression
Conversation
Tx
Rx
Conversation
Bandwidth used
NN40020-603 NN40020-603
Hello Fred. This is Susan.
Voice frames sent even when speaker is silent
Hello Fred. This is Susan.
Fred here.
Independent Tx and Rx bandwidth not shared by half-duplex calls.
Bandwidth available for data apps.
Do you have a minute?
Hi!
Do you have a minute?
Hi!
Sure!
Channel/Link max
Time
Channel/Link max
Time
Sure!
Channel/Link max
Time
Channel/Link max
Time