Modifies the DTE Addresses attribute of the specified Reachable
    Address instance on a particular Routing Circuit to include
    at least the address or addresses specified.

    add  [node node-id] routing circuit circuit-name -
         reachable address simplename -
         dte addresses {address[,address...]}

    DTE Addresses

    Support: End,L2
    Default: No DTE addresses        Value: Set of DTE addresses

    A set of DTE addresses to which a call may be directed in order
    to reach an address that matches the address prefix of this
    reachable address.

    This characteristic is supported if the node is a level 2 router,
    where the owning circuit's characteristic type is one of the X.25
    circuit types, and the reachable address's characteristic type
    is outbound. It is also supported by end nodes operating over an
    x25 da circuit. You can modify this characteristic only when the
    entity is disabled.