ACC X.25 Protocol User's Guide

ZX25D X.25 Protocol Driver
Configuration
Chapter 3 41
IUF : 0 Normal error handling (level 2 link reset) on
receipt of unsolicited response frame with F=1.
1 Ignore F=1 (treat as if F=0) for any unsolicited
response frames with F=1.
Extended K : When level 2 modulo 128 sequence number is
selected by setting L2E to 1, the level 2 window
size is specified by combining “Extended K”
(providing the most significant bits 6 through 3)
with “K” from the select word (providing the
least significant bits 2 through 0). The
allowable values for the level 2 window size
with modulo 128 operation is from 1 to 127.
CAUTION: Choosing large values for the
window size may cause the interface card
to run low on transmit buffers.
Max_inpack
et :
The maximum L3 packet size expected on this
link. The table below shows the valid
max_inpacket parameter values in the left
column and the corresponding maximum L3
packet size in the right column.
Valid max_inpacket
Parameter Value
Maximum L3 Packet Size
0 - 128 8 - 256
1 - Reserved 9 - 512
2 - Reserved 10 - 1024
3 - Reserved 11 - 2048
4 - 16 12 - 4096
5 - 32 13 - Reserved
6 - 64 14 - Reserved
7 - 128 15 - 240