priIntTdmChannelMap 1.3.6.1.4.1.207.8.4.4.4.42.1.1.5

A bit map of the channels in the PRI interface which are dedicated to TDM. PRI channels are numbered from 0 to 31, 0 is unused, 16 (E1) or 24 (T1) is the D channel. The map values are 2 to the power of the channel number.