| Description | The index of another channel of this interface for which
the channel serves as feedback channel.
If no feedback information is transferred on this channel,
then the value of this ID is 0. If the channel type is set
to notInUse(1), then the value of this object must be 0.
If the channel type is rohc(2) and the value of this object
is a valid channel ID, then feedback information is
piggy-backed on the ROHC channel. If the channel type is
dedicatedFeedback(3), then feedback is transferred on this
channel and the value of this object MUST be different from
0 and MUST identify an existing ROHC channel. |