This read-only integer is the logical connection number for this endpoint, reporting 0 if the port/DLCI combination is actually a multicast group rather than a point-to-point connection; its supported range depends on card type, matching the same 16-271/16-1015/16-2015/16-4015 pattern as this MIB's other channel-number objects, with FRSM12 encoding chassis, slot, and channel number in separate bytes. An administrator reads this to map a given port/DLCI endpoint to its actual logical connection, or to recognize that the endpoint represents a multicast group instead. For example, endChanNum reporting 0 for a particular port/DLCI combination tells an administrator that entry is a multicast group rather than an individual point-to-point channel.