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268 Chapter 8
C:\Spk\Ref\RefGuideRevE\Enc-dec.fm
Signaling Encoder and Decoder - Screens and Control Fields
Control Fields for the Signaling Encoder and Decoder
Message (FOCC)
Figure 8-6 AMPS-TACS/NAMPS-NTACS FOCC Message and Filler Data
Format
Message streams A and B specify various forward control channel
parameters.
Operating Considerations
Like the filler information, the message information can only be input
in full (seven digit) lines. Also, message streams A and B must have the
same number of lines in them.
Screens Where Field is Present
SIGNALING ENCODER (Modes: AMPS-TACS, NAMP-NTAC)
T
1
2
(2 Bits)
T
T
1
2
T
(26 Bits)
Information
Parity
Parity
(12 Bits)
Contents of the Message or Filler Field
WORD B
WORD A
...........is output in this sequence.
10 Bits 11 Bits 40 Bits 40 Bits 40 Bits
DOTTING
WORD
SYNC
REPEAT 1
OF
WORD A
REPEAT 1
OF
WORD B
REPEAT 2
OF
WORD A
REPEAT 4 REPEAT 5 REPEAT 5
WORD B WORD B
OF OF
WORD A
DOTTING
40 Bits40 Bits40 Bits 10 Bits
Busy/Idle Bits
The data you enter here............
FOCC
Stream A
Stream B
MessageMessage
Filler
Filler
OF