ACC X.25 Protocol User's Guide

ZX25D X.25 Protocol Driver
Configuration
Chapter 340
POLL Word for an X.25 Link Configuration
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
T/C 80 CT
S
N
C
T3 L2E IUF 0 Extended K Max_inpact
T/C : 0 Port to act as DCE
1 Port to act as DTE
80 : 0 X.25 1984/1988 standard
1 X.25 1980 standard
CTS : 0 L2 Reset if CTS or DCD dropped
1L2 not Reset
ND : 0 No Enforced D-Bit negotiation in ITU-T 1984/88
Configurations
1 Enforce D-Bit negotiation in ITU-T 1984/88
Configurations
T3 : 0 T3 not in use
1 If T/C=0 (i.e. DCE) then T3 timer will operate.
Note: If the T3_T4_timer parameter is specified,
then the T3/T4 timer will be enabled regardless
of the setting of this bit.
L2E : 0 L2 Modulo 8 sequence numbering
1 L2 Modulo 128 sequence numbering
Note: If L2E is 1, then the window size (K) is
taken from the “Extended K” field (providing
bits 6 through 3) combined with “K” from the
select work (providing bits 2 through 0).