Ev MIB pktcDevEvEndpointName description

Hi,
  The current Ev MIB has below description.

pktcDevEvEndpointName OBJECT-TYPE
    SYNTAX      SnmpAdminString
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
            "This is the endpoint identifier followed by the FQDN/IP
            Address of the device. This is in the form - AALN/X:FQDN/IP
            Address. If the event is not specific to an endpoint, then
            the contents is just the FQDN/IP address."
    ::= { pktcDevEventEntry 8 }

In Packetcable FQDN(only) is allowed for MTA during NCS message
exchange. Why do we need IP address be referred here?

Comments please..

Thx, Satish