Each row entry represents a DS1 channel on a IOM card in a chassis in the system. DS1 channel entries for DS3 ports cannot be created and deleted via SNMP SET operations. Entries in this table will be created automatically when tmnxDS3ChannelChannelized is set to 'true'. DS1 channel entries for DS1 ports can be created and deleted via SNMP SET operations. For each tmnxDS1Entry, there will be a corresponding entry in the tmnxPortTable and the ifTable.