set  [node node-id] hdlc link link-name ...

    Modifies the attributes for an hdlc link entity, which is
    associated with a port of the supporting physical layer module.
    It contains attributes common to local HDLC operations for all
    logical stations on the line.  The modifiable attributes and
    their data types [in brackets] are:

    acknowledge timer [milliseconds]
    holdback timer [milliseconds]
    maximum data size [integer]
    maximum unsequenced pdus [integer]
    minimum data size [integer]
    physical line [local-entity-name]
    preferred crc type [CRC-type]
    preferred local station address [integer]
    preferred maximum data size [integer]
    preferred window size [integer]
    receive buffers [integer] (OpenVMS)
    retry maximum [integer]
    sequence modulus [8 or 128]