FSK Modem and DTMF Codec
CMX865
5.
General Description
The CMX865 transmit and receive operating modes are independently programmable.
The transmit mode can be set to any one of the following:
Bell 103 modem. 300bps FSK.
V.23 modem. 1200 or 75bps FSK.
Bell 202 modem. 1200 or 150bps FSK.
DTMF transmit.
Single tone transmit (from a range of modem calling, answer and other tone frequencies)
User programmed tone or tone pair transmit (programmable frequencies and levels)
Disabled.
The receive mode can be set to any one of the following:
Bell 103 modem. 300bps FSK.
V.23 modem. 1200 or 75bps FSK.
Bell 202 modem. 1200 or 150bps FSK.
DTMF detect.
2100Hz and 2225Hz answer tone detect.
Call progress signal detect.
User programmed tone or tone pair detect.
Disabled.
The CMX865 may also be set into a powersave mode which disables all circuitry except for the C-BUS
interface and the Ring Detector.
© 2005 CML Microsystems Plc
10
D/865/3
CMLMICRO [ CML MICROCIRCUITS ]
