Evaluation Kit for CMX602B

EV6021

 2000 Consumer Microcircuits Limited

20

UM6021/4

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 600

Ω) 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 2k2

Ω).

If a complex termination is required positions C11, R16 and R19 can be used with switch SW1 set to

‘COMPLEX’.