Human-readable 'reject' subnet for the protocol specified in
'xcmCommsOptionValueOID' (eg, 'xcmCOInternetIP') is specified
in 'xcmCommsOptionsValueString' (eg, '19.242.255.255' as might
be specified in an 'xcmCOInternetIPSubnetMask' comms option).
Usage: 'Overloads' protocol types to yield protocol specific
subnet masks of remote entities at this protocol layer,
from which incoming datagrams and/or connections SHALL
be rejected.
Usage: Subnet mask format is the protocol specific canonical
format defined for this protocol type as defined elsewhere in
this XCMI Comms Config TC.