set  [node node-id] modem connect line line-name ...

    Modifies the attributes for an modem connect line entity, which is
    associated with a physical circuit on the node.  The modifiable
    attributes and their data types [in brackets] are:

    alternate speed [bits-per-second]
    call accept timer [milliseconds]
    carrier loss timer [milliseconds]
    clock [external, internal, or reflected]
    encoding [normal or nrzi]
    initial hold timer [seconds] (Tru64 UNIX)
    maximum call setup timer [seconds]
    maximum disable transmit timer [milliseconds]
    maximum dsr deassertion timer [milliseconds]
    maximum enable transmit timer [milliseconds]
    minimum dtr deassertion timer [milliseconds]
    modem control [full or none]
    modem options [dialout, direct or rate select]
    modem protocol format [type] (Tru64 UNIX)
    modem protocol type [prot-type] (Tru64 UNIX)
    rate select [high or low]
    speed [bits-per-second]
    successful call indication timer [seconds]
    suppress test indicator [boolean]
    transmit holdoff timer [milliseconds]