Modifies the RPOA Sequence attribute of a given X25 Access
    Template instance to include at least the specified DTE
    address or addresses.
    add  [node node-id] x25 access template template-name -
          rpoa sequence {dte-address[,dte-address...]}
    RPOA Sequence
    Default: No DTE addresses       Value: Set of DTE addresses
    Private Operating Agency sequence of transit networks to be used
    in setting up the call. Format the values to specify a set of
    DTE addresses. Each DTE address is four digits long. An empty set
    indicates that no sequence is included in the outgoing call.
    Example:
    add x25 access template "OSI Transport" -
          rpoa sequence {%x9999,%x8888}