W925E625 Datasheet, PDF (64/75 Pages) Winbond – 8-bit CID MICROCONTROLLER

W925E/C625
CPE goes off-hook
Tip/Ring
CAS
A
CPE mutes handset & disables keypad
CPE sends
ACK
B
C
D
Mark
E
ASE
CIDF
ALGO
t _REC
t _ABS
CPE unmutes handset and
enable keypad
Message
F
G
...
FSKE
FCD
FDR
FCLK
FDATA
...
A = 75 - 85mS
B = 0 - 100mS
C = 55 - 65mS
D = 0 - 500mS
E = 58 - 75mS
Data
F = depends on data length
G <= 50mS
Figure 6-28 Input and Output Timing of Bellcore Off-hook Data Transmission
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