
108 Silence compression
P0937663 02.0
Figure 53 Two Calls on a Full Duplex Link With Silence compression
Comfort Noise
To provide a more natural sound during periods of silence, comfort noise is added at the
destination gateway when silence compression is active. The source gateway sends
information packets to the destination gateway informing it that silence compression is
active and describing the background comfort noise to insert. The source gateway only
sends the information packets when it detects a significant change in background noise.
Time ->
Bandwidth ->
Bandwidth Used
Time ->
Bandwidth ->
Tx ChanRx Chan
Independent Tx and Rx bandwidth
not shared by “half-duplex” calls.
Peek channel bandwidth is
n * peek bandwidth per call.
Conversations
Rx
Tx
Fred Here.
Hello Fred. This is Susan. Do you have a minute?
Sure!Hi!
Rx
Tx
Fred Here.
Hello Fred. This is Susan. Do you have a minute?
Sure!Hi!
Rx
Tx
Hola Isabella!
Buenos noches Juan. Muy bien, y tu?
Como estas?
Rx
Tx
Hola Isabella!
Buenos noches Juan. Muy bien, y tu?
Como estas?
Channel Max
Channel Max
Hello Fred. This is Susan.
Do you have a minute?
Conversation
Fred here.
Hi!
Sure!
Bandwidth used
Peak channel bandwidth is n * peak
bandwidth per call
Time
Channel/Link max
Tx
Rx
Tx
Rx
Buenos noches Juan
Muy bien, y tu?
Hola Isabella
Com o estas?
Independent Tx and Rx bandwidth not
shared by half-duplex calls
Time
Channel/Link max
Tx channel
Bandwidth
Rx channel
Bandwidth
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