Two methods of channel bundling
- Static
channel bundling
If a connection is established with static channel bundling, the LANCOM
tries to establish the second B channel immediately after setting up
the first B channel. If this does not work because, for example, this
channel is already taken by another device or a different connection
within the LANCOM, the connection attempt is automatically and regularly
repeated until the second channel is available for it.
- Dynamic
channel bundling
In the case of a connection with dynamic channel bundling, the LANCOM
first only establishes one B channel and begins transmitting data. If, during this connection, it determines
that the throughput
rate lies above a certain threshold value, it tries to add the second
channel.
If the second channel is established and the data throughput rate
drops below the threshold value, the LANCOM waits for the set B2 timeout
period and then automatically closes the channel again. In this way,
the per
minute charges are fully utilized so long as rate
information is communicated during the connection. Therefore, the LANCOM
only uses the second B channel if and as long as it really needs it.