EV6021 Datasheet, PDF (15/28 Pages) CML Microcircuits – User Manual

Evaluation Kit for CMX602B
1.6.2.3 Main Window
EV6021
Change the mode of operation of the CMX602B by checking the appropriate radio button in the CMX602B
modes section.
In the controls section checking either of External Phone Mute or Hook will energise the appropriate relay on
the EV6021 board. Checking AC load or Wetting Current will apply the appropriate load to the line.
Checking Local MUTE will disable the speech path via handset socket, J3 or jack socket, J4 or
testpoint TP6. Whenever DTMF is checked the current digit (selected in the combo box labelled
‘Digit’) will be generated by the EV6021 board (U5, TP5088).
The on-hook detection options override the setting of switch SW3 and control the level at the CMX602B pin 3.
The FSK/CAS source options override the setting of switches SW2 and SW4, selecting the path these signals
take from the line to the CMX602B.
The EV6021 Demonstrations buttons will run the functions or demonstrations described in the following
sections.
An indication will be made of the state of the RS232 communications link to the EV6021 board in the bottom
right of the panel.
 2000 Consumer Microcircuits Limited
15
UM6021/4