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Advanced Configuration Parameter Default Values 5-2
QuickSelect
The QuickSelect feature automatically detects and uses the
protocol required for each digital call, either V.120 or
Async-Sync PPP. Typically, V.120 is used for communication
between two computers, while PPP is used for
communication between a computer and an Internet
service provider.
DBA
Dynamic Bandwidth Allocation. DBA is a method of
automatically reallocating bandwidth, such as a B channel.
DBA allows you to place or receive a voice call while a
Multilink PPP call is active.
When a voice call comes in, or if you lift the handset to place
a call while you have both B channels in use because of
Multilink PPP, one of the B channels is temporarily removed
from the Multilink PPP call and is used for the voice call.
Once the voice call ends, that B channel is automatically
returned to the Multilink PPP call. Although throughput is
reduced while the voice call is active, the reliability of the
Multilink PPP call is not affected.
If you are on the receiving end of a Multilink PPP call and you
place a voice call, one of the B channels will be used for the
voice call but once the voice call ends, the B channel cannot
be returned to the Multilink PPP call. The B channel can only
be returned to the Multilink PPP call if you placed the call.