ifConvertToIfIndexChannelId is the channel identifier associated with a FUNI or FRATM service ID in BNPC notation, and is part of the index into ifConvertToIfIndexTable. Admins use it to distinguish individual logical channels multiplexed onto the same physical port when translating hardware addressing into the ifIndex used for SNMP polling. For example, two different FRATM channels on the same port would be looked up using different ifConvertToIfIndexChannelId values but identical board, netmod, and port IDs.