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Field Service Ver. 7.0 Jan. 2009
D. Common signal bit definition
(1) Call function (1 octet)
Top octet
b0
b1
b2
b3
1
0
0
0
(2) Modulation mode (3 octets)
1st octet
b0
b1
b2
b3
1
0
1
0
2nd octet
b0
b1
b2
b3
0
0/1
0/1
0/1
Y104784-2
b4
b5
b6
b7
0
0
0
0
1
0
0
0
1
0
1
1
0
0
0
1
1
0
1
0
1
1
1
1
1
(Other than the above = Reserved)
b4
b5
b6
b7
0
0/1
0/1
0/1
b4
b5
b6
b7
1
0
0/1
0/1
Service Manual
2. COMMUNICATION CONTROL
Meaning
(Call Function category tag)
Defined by ITU-T
PSTN multi-media terminal
V18 text phone
Video tex
FAX transmission from the calling terminal
FAX reception in the calling terminal
Data transmission / reception
Expansion octet = with call function represented by
next octet
Meaning
(Modulation mode category tag, b4 = 0 is
first octet)
PCM modem ability disabled/enabled
V34 full-duplex ability disabled/enabled
V34 half-duplex ability disabled/enabled
Meaning
(b3, 4 and 5=0, 1, 0 means expanded
oct.)
V32bis / V32 ability disabled / enabled
V22bis / V22 ability disabled / enabled
V17 ability disabled / enabled
V29 half-duplex ability disabled / enabled
(used in T.30)
V27ter ability disabled / enabled
Item
No.
1
2
Item
No.
3
4
5
6
7
37
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