Evaluation Kit for CMX602B
EV6021
Counters record the number of times muting has occurred (M) and the number of times a valid CAS
tone has been detected (C). The counts are displayed on row 3 of the LCD.
DTMF digit ‘D’ is transmitted on to the phone line as an acknowledgement tone. If the EV6021 is
linked to a PC other DTMF digits can be sent as an acknowledgement. CLI message parameters
are displayed on the top two rows of the LCD.
On the EV6021 board, the line termination resistor R21 (factory-fitted 600Ω) should be fitted and the
switch SW1 set to ‘RESISTIVE’. If an off-hook dc load is required, for feature phone mode, a
resistor must be fitted in position R8 (factory-fitted 2k2Ω).
If a complex termination is required positions C11, R16 and R19 can be used with switch SW1 set to
‘COMPLEX’.
2000 Consumer Microcircuits Limited
20
UM6021/4
CMLMICRO [ CML MICROCIRCUITS ]
