Represents the layer and bandwidth (rate) of the TPs contained in the TPPool to which the common transmission parameters apply.
Specifically, for a CTP, it may identify the connectable layer of the CTP (besides other layers), and the connection rate supported by the CTP.
For an ATM TP, it identifies the layer (and not the bandwidth) of the ATM TP.
For GTPs it identifies the layers of the TPs grouped by the GTPs.

Readable by NMS? Yes
Writeable by NMS? No
Invariant? Yes
