"Reachable address prefix?"

    The reachable address sub-entity name is used to select the
    remote DTE address to where a routing packet is sent. The
    selection is done by finding a reachable address sub-entity that
    has an address prefix that matches the beginning of the remote
    NSAP in the routing packet.

    Specify the address prefix for this reachable address entity.
    The address prefix is a string of characters that is a valid
    beginning of an NSAP (for example, 41:45436192:). The address
    prefix will match all NSAPs.