Default: 2             Value: 1-127

    Default window size for all virtual circuits on the DTE; that
    is, the default number of unacknowledged packets. This value
    must not be greater than the value of the maximum window size
    characteristic, and must not be less than the value of the
    minimum window size characteristic.

    Example:

    set x25 protocol dte dte-1 default window size 2