1  –  link

    set  [node node-id] lapb link simple-name ...

    Modifies the attributes for an lapb link entity, which is
    associated with a port of the supporting physical layer, and
    contains attributes that describle local LAPB operation.  The
    modifiable attributes and their data types [in brackets] are:

    acknowledge timer [milliseconds]
    holdback timer [milliseconds]
    interface type [DTE-or-DCE]
    maximum data size [integer]
    physical line [local-entity-name]
    poll timer [seconds]
    receive buffers [integer] (OpenVMS)
    retry maximum [integer]
    sequence modulus [8-or-128]
    window size [integer]

1.1  –  acknowledge_timer

    Default: Supplied by profile   Value: 1-60000

    Time, in milliseconds, to wait for an acknowledgment before
    initiating recovery action. This attribute corresponds to the
    LAPB parameter T1. You can modify this characteristic only when
    the entity is disabled.

1.2  –  holdback_timer

    Default: Implementation specific  Value: 0-60000

    Delay, in milliseconds, before an acknowledgment must be sent.
    This characteristic corresponds to the LAPB parameter T2. You can
    modify this characteristic only when the entity is disabled.

1.3  –  interface_type

    Default: dte           Value: dce or dte

    Address mode for this link.

    dce   Use DCE address mode.

    dte   Use DTE address mode.

    You can modify this characteristic only when the entity is
    disabled.

1.4  –  maximum_data_size

    Default: Supplied by profile   Value: 1-65532

    Maximum frame size, in octets, of an information field in an
    I-frame.

1.5  –  physical_line

    Default: No default    Value: Local entity name

    Name of the Physical layer and line entity over which the LAPB
    protocol is to operate. You must give this characteristic a value
    before you enable the link.

1.6  –  poll_timer

    Default: Implementation specific   Value: Supplied by profile

    Maximum period in seconds that may elapse without frames being
    exchanged on the Data Link. On expiration, an RR(P) is sent to
    elicit a response from the other end.

1.7  –  receive buffers (OpenVMS)

    Default: Implementation specific     Value: 1-128

    Specifies the number of receive data buffers.

1.8  –  retry_maximum

    Default: Supplied by profile         Value: 1-255

    Maximum number of times that a frame will be retransmitted
    before assuming a fatal error, at which point more drastic
    error recovery action will be attempted. This characteristic
    corresponds to the LAPB parameter N2.

1.9  –  sequence_modulus

    Default: Supplied by profile        Value: 8 or 128

    Type of sequence numbering.

    8     Use normal sequence numbering.

    128   Use extended sequence numbering.

1.10  –  window_size

    Default: Supplied by profile         Value: 1-127

    Window size for transmitting and receiving I-frames. This
    characteristic corresponds to the LAPB parameter K.