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Parameter ID 0 0 0 0 0 0 0 0 Parameter set identification
Parameter length 0 0 0 0 0 0 0 1
Parameter value 0 1 0 1 0 1 1 0 Character V
Table 6-15. Connection management parameter
Parameter ID 0 0 0 0 0 0 0 1 Connection management
Parameter length "8 "7 "6 "5 n4 n3 n2 "1
Parameter value 0 0 0 0 v x r h
Note.- The value in the parameter length $field is variable to allow for the possibility of additional
options.
Annex 10 - Aeronautical Telecommunications Volume 111
Table 6-16. Connection management parameter values
Bit Name Encoding
1 h
h = 0 No link currently established.
h = 1 Link currently established.
2 r
3 X
Table 6-17. Abbreviated XID names
r = 0 Link conncction accepted.
r = 1 Link connection refused.
x = 0 Only VDL-specific ground DTE addresses.
x = I Ground network DTE addresses accepted.
4 v
5-8 Reserved
Name C/R P/F h r x v Notes
v = 0 Expedited subnetwork connection not supported
v = 1 Expedited subnetwork connection supported.
Set to 0
GSIF 0 0 - - - - Ground Station Identification Frame
XID-CMD-LE 0 1 0 0 x x Link Establishment
XID-CMD-LCR 0 0 0 1 x x Link Connection Refused
XID-CMD-LPM 0 1 - - - Link Parameter Modification
XID-CMD-HO 0 1 1 0 x x If P=l, then Initiating Handoff.
XIICMD-HO 0 0 1 0 x x If broadcast and P=O, then cornanding a
Broadcast Handoff.
If unicast and P=O, thcn Requesting Handoff.
XID-RSP-LE 1
XID-RSP-LCR 1
XIIRSPLPM 1
XIIRSPHO 1
x = don't care case
- = connection management parameter not included
Table 6-18. Signal quality parameter
Parameter ID 0 0' 0 0 0 0 1 0 SQP
Parameter length 0 0 0 0 0 0 0 1
Parameter value 0 0 0 0 q4 q3 q2 91
The contents of the SQP value field (q bits) are as defined in 6.4.1.1.4.
6 / 1 W
No. 72
Part I Annex 10 - Aeronautical Telecommunications
Table 6-19. XID sequencing parameter
Parameter ID 0 0 0 0 0 0 1 1 XID sequencing
Parameter length 0 0 0 0 0 0 0 1
Parameter value f4 r3 f2 rl 0 S3 S2 S1
Table 6-20. AVLC specific options parameter
--
Parameter ID 0 0 0 0 0 1 0 0 AVLC specific options
Parameter length "8 n7 "6 "5 n4 n3 "2 "1
Parameter value O O O b , b l i v x
Note.- The value in the parameter length jeld is variable to allow for the possibility of additional
options.
Table 6-21. AVLC specific option values
Bit Name
6-8 Reserved
Encoding
x = 0 Only VDL-specific DTE addresses
x = 1 Ground network DTE addresses accepted
v = 0 Expedited subnctwork conncction not supported
v = 1 Expedited subnctwork conncction supported
i = 0 Does not support Initiated Handoff.
i = I Supports Initiated Handoff.
b, = 0 Broadcast link handoff not supported.
b1 = 1 Broadcast link handoff supported
b, = 0 Broadcast subnctwork conncction not supportcd
b, = 1 Broadcast subnetwork connection supported
(b, shall also be 1)
Table 6-22. Expedited subnetwork connection parameter
Parameter ID 0 0 0 0 0 1 0 1 Expedited SN connection
Parameter length '8 n7 '6 '5 n4 n3 n2 '1
Parameter value Ps P7 Ps P5 p, pS pz p1 an IS0 8208 octet
Annex 10 - Aeronuuti~ul Telecommunications
Table 6-23. LCR cause parameter
Volume III
Parameter ID 0 0 0 0 0 1 1 0 LCR cause
Parameter length "8 "7 "6 "5 n4 n3 n2 "1
Parameter value '8 C7 '6 C5 c4 c3 c2 c1 cause
d9
4 d7 d6 d5 d4 d3 d2 dl
as % a6 a, a3 a, a, additional data
Table 6-24. Cause code table
Cause Function Additional data encoding
OOh Bad local parameter. g8 g7 g6 g, g, g3 g2 g1
The additional data block, which may be repeated,
contains the GI and PI of a parameter which cannot be Ps P7 Ps Ps P4 P3 P2 Pr
satisfied by this ground station. This cause will not be
sent for an illegal Connection Management parameter.
Olh Out of link layer resources.
02h Out of packet layer resources.
03h Terrestrial network not available.
04h Terrestrial network congestion.
05h Cannot support autotune.
06h Station cannot support initiating handoff.
07-7Eh Reserved
7Fh Other unspecified local reason.
undefined
80h Bad global parameter.
The additional data block, which may be repeated,
scaotnistafiiends bthye aGnyI agnrdo uPnId osft aat ipoanr ainm tehteer swyshtiecmh . cTahninso ct abues e identical to cause code 00
will not be sent for an illegal Connection Management
parameter.
6nl/97
No. 72
Part Z Annex 10 - Aeronautical Telecommunications
Cause Function Additional data encoding
-
8 1 h Protocol Violation. O O O u i d p c
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