Modifies the Members attribute of a given X25 Protocol Group
    instance to include at least the specified member record or
    records.

    add  [node node-id] x25 protocol group group-name -
          members {record[,record...]}

    Members

    Default: No DTEs       Value: Set of records

    DTEs at a gateway system that make up the group. Format the
    values to specify a set of records. Each record consists of a
    name that identifies an X25 protocol dte entity and an integer
    (in the range 0 to 9999) that identifies the CUG number assigned
    by the network. If a DTE is already created and enabled and is
    then added to the set of members, it must be disabled and re-
    enabled to service the specified CUG number or BCUG.

    Example:

    add x25 protocol group group1 -
          members {[dte = dte-1, index = 4444], -
                   [dte = dte-0, index = 8787]}