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.