BS 6940-2:1989

Foreword
Committees responsible
Specification
Section one. General
1 Scope
2 Terminology
3 General
4 Test for compliance
Section two. Preparation for tests
5 General
6 Forward control channel format and default values
7 Forward voice channel format and default values
8 Reverse control channel format and expected
       values
9 Reverse voice channel format and expected values
Section three. Initialization tests, system and channel
                scanning
10 Enter idle from a single control channel
11 Select the stronger of two dedicated control
       channels
12 Reject strong control channel signal outside the
       dedicated control channel set
13 Reject control channel with BCH incorrect data
14 Scan home paging channel set
15 Scan greater than 21 paging channels when N is
       greater than 21
16 Select the stronger paging channel after a system
       access
17 Scan paging channels of the non-preferred system
18 Extended address word sent if E field in overhead
       is set to 1
19 Access at full power when RCF is set to 0
20 Scan separate access channels when CPA = 0
21 Reject local control message when group
       identification does not match
22 Do not access if paging channel AID1 is not equal
       to dedicated control channel AID1
Section four. Overhead messages to all MS:
                registration
23 Set up 4 AIDsp and NXTREGsp values and test
       registration
24 Register when REGID exceeds NXTREGsp
25 Retain AIDsp when AID changes
26 Response to a registration increment global
       action message
27 Forced registration and overload control
28 Release and re-registration after failure
Section five. Overhead messages to all MS: new access
                channel set and RESCAN
29 MS to register on new access channel set
30 Rescan on receipt of a RESCAN message
Section six. Messages to individual mobile stations
                (MS)
31 Conversation link when paged
32 No transmission outside allowed channels
33 No response to messages for other MS after
       receiving correct page message
34 Scan channels defined by directed retry
35 Respond to release message
36 Ignore intercept message while responding to a
       page
37 Ignore reorder message while responding to a page
38 Time out after page response
39 Handoff
40 Power control
41 Operation of flash
42 Release, audit, charge rate, maintenance alter
       and stop alert
43 Orders and discontinuous transmission, (DTX)
       operation in the 'conversation' task
44 Release from voice channel on loss of received
       signal; acceptance of local control and
       maintenance messages
Section seven. MS system access
45 Response to audit order
46 Access collision
47 Access failure and retry
48 Continue access when Busy/Idle status field = 0
49 No access when Busy/Idle stream remains busy
50 Response to Access Attempt Parameters Global
       Action Message
51 Send correctly coded Digital Colour Code (DCC)
Section eight. Originations
52 Origination on the preferred system
53 No response to release message during an
       origination
54 Abort if intercept message received during an
       origination
55 Response to reorder message received during an
       origination
56 Time out after origination request
57 Origination after Call Queued Message
58 Disregard Initial Voice Channel Designation
       Message 70 s after Call Queued Message
59 Operator termination of origination after Call
       Queued Message
60 Handoff
Section nine. MS generated exits from the idle task:
                non-preferred system time
61 Return to preferred system
62 Return to preferred system: non-preferred system
       barred
Section ten. Signalling under weak signal conditions
63 Performance of the MS under weak signal
       conditions
Appendices
A Operational requirements of the MS
A.1 Information permanently stored in the MS
A.1.1 General
A.1.2 Mobile identification number
A.1.3 Serial number
A.1.4 Station class mark
A.1.5 Access overload class
A.1.6 Access method
A.1.7 First paging channel
A.1.8 Home area identification
A.2 Other information stored in the MS
A.2.1 Registration memory
A.2.2 Local control option
A.2.3 Preferred-system selection
A.2.4 Inter-system roaming inhibit option
B Signalling protocols and messages used by the MS
B.1 Supervisory audio tone
B.1.1 General
B.1.2 SAT determination
B.1.3 SAT transmission
B.1.4 Fade timing status
B.2 Signalling characteristics
B.2.1 Signalling tone
B.2.2 Encoding
B.2.3 Modulation and data
B.3 Malfunction detection
B.3.1 Malfunction timer
B.3.2 False transmission
B.4 Call processing
B.4.1 General
B.4.2 Initialization Task
B.4.3 Paging Channel Selection Task
B.4.4 Idle Task
B.4.5 System Access Task
B.4.6 Mobile station control on voice channel
C Signalling formate for the mobile station
C.1 General
C.2 Reverse control channel
C.3 Reverse voice channel
D Signalling protocols and messages used by land
       stations
D.1 Supervision
D.1.1 SAT transmission
D.2 Call processing
D.2.1 General
D.2.2 Overhead functions for mobile station initiation
D.3 Mobile station control on control channel
D.3.1 Overhead information
D.3.2 Page
D.3.3 Order
D.3.4 Local control
D.4 Land station support of system access by mobile
       stations
D.4.1 Overhead information
D.4.2 Reverse control channel seizure by mobile station
D.4.3 Response to mobile station messages
D.4.4 Mobile station control on voice channel
E Signalling formats for the land station
E.1 Forward control channel
E.1.1 General
E.1.2 Mobile station control messages
E.1.3 Overhead messages
E.1.4 Data restrictions
E.2 Forward voice channel
F Cross-references to BABT/SITS/84/13/A, issue 1,
       to Amendment No. 8 and, T.A.C.S. Mobile Station -
       Land Station Compatibility Specification
Tables
1 Decimal-to-binary conversion
2 Fourth Digit BCD Mapping procedure
3 Mobile station class mark
4 Coded digital colour code
5 Digit code
6 Order and order qualification codes
7 SAT colour code (SCC)
8 Overhead message types
9 Global action message types
10 Restricted fourth to tenth (inclusive) digits
Figures
1 Reverse control channel message stream
2 Word format of reverse control channel message
3 Reverse voice channel message stream
4 Order confirmation message
5 Word format of called-address message
6 Forward control channel message stream (land-to-
       MS)
7 Word format of mobile station control message
8 Word format of system parameter overhead message
9 Word format of global action messages
10 Word format of registration identification
       message
11 Word format of control filler message
12 Forward voice channel message stream
13 Format of mobile station control message

Describes signalling procedures and message formats used by the mobile station when establishing and maintaining communications with land stations. Provides information on the way communications are established and on the procedures and message formats used by the land station. Covers terminology, test for compliance, preparation for tests, initialization tests, system and channel scanning, overhead messages to all MS: registration, new access channel set and RESCAN, messages to individual mobile stations, MS system access, originations, MS generated exits from the idle task: non-preferred system timer and signalling under weak signal conditions.