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The first octet of the additional data block contains:
1 - C/R bit (c bit) of the received XID;
2 - P/F bit (p bit) of the received XID;
3 - Disconnected bit (d bit) shall be set to 1 if the LME
has no links with the remote LME (the unexpected bit
shall also be set to 1);
4 - Illegal bit (i bit) shall be set to 1 if the LME receives
an illegal XID (i.e., not listed in Table 3-46 and
described in 6.5.4.4);
5 - Unexpected bit (u bit) shall be set to 1 if the LME
receives a legal XID which is not legal in the context
in which it was received.
The remaining octets contains the parameter value of m8 m7 I% m5 m4 m3 m2 m1
the Connection Management parameter (m bits) if included in
the illegal XD.
After transmitting or receiving an LCR with. this cause
code, an LME shall delete all of its links.
82h Ground system out of resources.
83-FEh Reserved
FFh Other unspecified system reason.
Table 6-25. Modulation support parameter
Parameter ID 1 0 0 0 0 0 0 1 Modulation support
Parameter length 0 0 0 0 0 0 0 1
Parameter value 0 0 0 0 m4 m3 m2 m1
Table 6-26. Modulation scheme and bit rate
1 MSK
Bit Name
0 (Not Mode 1)
1 Mode 1, 2 400 bitsls
Encoding
0 (Not Mode 2)
DSPSK I Mode 2, 3 1 500 bitsls
Note.- More than one modulation scheme m y be supported by an aircraft-
3 Reserved
4 Reserved
-6/11/97
No. 72
Set to 0
Set to 0
Annex I0 - Aeronautical Telecommunications Volume I11
Table 6-27. Acceptable alternative ground station parameter
Parameter ID 1 0 0 0 0 0 1 0 Alternate ground station
Parameter length n8 n7 n6 n~ n4 n3 n2 n1
Parameter value g22 g23 g24 g25 g,, g,, 0 0 DLS Address
gl5 g16 g17 g18 g19 g20 g21 O
g8 g9 g10 g11 g12 g13 g14 O
g, g2 g3 g4 g5 g6 g7 , O
Table 6-28. Destination airport parameter
Parameter ID 1 0 0 0 0 0 1 1 Destination airport
Parameter length n8 n7 n6 "5 "4 "3 n2 "1
Parameter value as % % a5 a, a3 a2 a, (firstcharacter)
b8 "7 b6 b5 b4 b3 b2 b1
'8 C7 '6 C5 C4 C3 c2 cl
d8 d6 d5 d4 d3 d, dl (fourth character)
Table 6-29. Aircraft Location parameter
Parameter ID 1 0 0 0 0 1 0 0 Aircraft location
Parameter length 0 0 0 0 0 1 0 0
Parameter value "12 Vir Via v8 v7 V6 v5 latitude (v)
v4 v3 v2 h,, h,, h,, hg longitude (h)
h, h7 h, h5 h4 h3 h2 hl
a8 a7 ag a5 a4 a3 a2 a, altitude (a)
-snly No. 72
Annex 10 - Aeronautical Telecommunications
Table 6-30. Aircraft location subfield description
Abbre-
Subfield Range Encoding Notes viation
Latitude +90 to -90 Integer [degrees*lO] positive = north, v bits
negative = south,
coded as two's complement
Longtitude +I80 to -180 Integer [degrees*lO] positive = east, h bits
negative = west,
coded as two's complement
Altitude 0 to 255 Integer 1 10 ] use 0 for < 999 feet, a bits
255 for >= 255 000 feet
Note.- For example, 100 degrees 18 minutes west equals 100.3 degrees west, which is expressed
as -1003, which is encoded as C15 hexadecimal.
Table 6-31. Autotune frequency parameter
Parameter ID 0 1 0 0 0 0 0 0 Autotune frequency
Parameter length 0 0 0 0 0 0 1 0
Parameter value m4 m3 m2 f12 f t t fto fg
fa f7 f6 f5 f4 f3 f2 fl
Table 6-32. Replacement ground station list
Parameter ID 0 1 0 0 0 0 0 1 Replacement ground station list
Parameter length n8 n7 n6 "5 n4 "3 "2 "1
Parameter value g22 823 g24 gzs g26 g27 O O
Table 6-33. Timer T4 parameter
Parameter ID 0 1 0 0 0 0 1 0 Timer T4
Parameter length 0 0 0 0 0 0 1 0
Parameter value "16 "15 "14 n13 n12 "11 "10 "9
n8 n7 n6 n5 "4 "3 "2 "1
611U97
No. 72
Annex 10 - Aeronautical Telecommunicaiions Volume I11
Table 6-34. MAC persistence parameter
Parameter 0 1 0 0 0 0 1 1 MAC persistence
Parameter length 0 0 0 0 0 0 0 1
Parameter value "8 "7 "6 n5 "4 "3 "2 *l
Table 6-35. Counter M1 parameter
Parameter ID 0 1 0 0 0 1 0 0 Counter M1
Parameter length 0 0 0 0 0 0 1 0
Parameter value n ~ 6 n ~ s "14 n ~ 3 n12 "11 "10 "9
"8 "7 "6 "5 "4 n3 n2 nl
Table 6-36. Timer TM2 parameter
Parameter ID 0 1 0 0 0 1 0 1 Timer TM2
Parameter length 0 0 0 0 0 0 0 1
Parameter value "8 n7 n6 n5 "4 n3 "2 "1
Table 6-37. T i e r TG5 parameter
Parameter ID 0 1 0 0 0 1 1 0 Timer TG5
Parameter length 0 0 0 0 0 0 1 0
Parameter value i8 i7 it5 i4 i, i2 i, (initiating)
'8 r7 r6 =5 r4 r3 r2 r, (responding)
Table 6-38. T3,1, parameter
 
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