WINDOW_SIZE
| Required? | No |
| Keyword Type | Unsigned number |
| Default | 2 |
| Range | 1–127 |
| Multiples Allowed? | No, only one for each LINK_STATION_X25_SPECIFIC_DATA parameter |
The WINDOW_SIZE parameter specifies the number of frames that can be sent or received on a virtual circuit without acknowledgment.
The value is an integer in the range 1–127.
This parameter is optional. The default is 2.