CMX860 查看數據表（PDF） - MX-COM Inc
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CMX860 Datasheet PDF : 36 Pages
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Telephone Signaling Transceiver
19
CMX860 Advance Information
Tx Data Source
(FSK
Synchronous
mode)
Bit 2-0
DTMF/Tones
Mode
Bit 8-0
Tx DTMF
Bit 4 = 1
In Synchronous mode, (b4-3 = 11) these three bits select the source of the data fed to the Tx
FSK modulator.
b2 b1 b0
1 x x Data bytes from Tx Data Buffer
0 1 1 Continuous 1s
0 1 0 Continuous 0s
0 0 x Continuous alternating 1s and 0s
If DTMF/Tones transmit mode has been selected (Tx Mode Register b15-12 = 0001) then b8-5
should be set to 0000 and b4-0 will select a DTMF signal or a fixed tone or one of four
programmed tones or tone pairs for transmission.
b4 = 0: Tx fixed tone or programmed tone pair
b3 b2 b1 b0 Tone frequency (Hz)
0
0
0
0 No tone
0
0
0
1 697
0
0
1
0 770
0
0
1
1 852
0
1
0
0 941
0
1
0
1 1209
0
1
1
0 1336
0
1
1
1 1477
1
0
0
0 1633
1
0
0
1 1300
(Calling tone)
1
0
1
0 2100
(Answer tone)
1
0
1
1 2225
(Answer tone)
1
1
0
0 Tone pair TA
Programmed Tx tone / tone pair, see 4.12.9
1
1
0
1 Tone pair TB
“
1
1
1
0 Tone pair TC
“
1
1
1
1 CAS Tones by default
Tx tone / tone pair TD when TD programmed
b3 b2 b1 b0 Low frequency (Hz) High frequency (Hz) Keypad symbol
0
0
0
0
941
1633
D
0
0
0
1
697
1209
1
0
0
1
0
697
1336
2
0
0
1
1
697
1477
3
0
1
0
0
770
1209
4
0
1
0
1
770
1336
5
0
1
1
0
770
1477
6
0
1
1
1
852
1209
7
1
0
0
0
852
1336
8
1
0
0
1
852
1477
9
1
0
1
0
941
1336
0
1
0
1
1
941
1209
*
1
1
0
0
941
1477
#
1
1
0
1
697
1633
A
1
1
1
0
770
1633
B
1
1
1
1
852
1633
C
Table 5: Transmit Mode Register
¤2000 MX-COM, Inc.
www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054
Doc. # 20480222.001
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.
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