Calling Line Identification (CLI)

Calling Number Display (CND), also known as Calling Line Identification (CLI) is an optional Telstra service where a callers telephone number is sent from the telephone exchange to a special CND/CLI reading device on your telephone line.

The callers phone number (unless the caller elects not to send this information) is sent as a modem type transmission of information that is sent before the first full telephone ring on your line.

Calling Number Display can be used with ALL OF OUR PRODUCTS, however the following devices MAY require you to change a dip switch setting to allow for the Calling Number Information to pass through to your reading device, but only IF your reading device is connected DIRECT to our product:

Our DUET SWITCH, EASY-CONNECT, FAXSWITCH, MODEM SWITCH and MULTIPLE NUMBER SWITCH devices in itheir default configuration are programmed to NOT PASS this first full ring, as it analyses this ring as part of its RING detection process. This means that in its default configuration, CND/CLI information will NOT pass through to your CND/CLI reading device.

If your CND/CLI reading device is NOT CONNECTED direct to our device (ie; it is connected direct to a telephone socket), then you will not need to alter any Dip Switch settings.

If your CND/CLI reading device is CONNECTED DIRECT to our device, then you should set a Dip Switch, located on the underside of the unit, as follows:


If you wish to set EASY-CONNECT, FAXSWITCH or MODEM SWITCH or to operate with the Telstra CND service, please set:
Dip Switch 3 to the ON position.

If you wish to set DUET SWITCH or MULTIPLE NUMBER SWITCH to operate with the Telstra CND service, please set:
Dip Switch 4 to the ON position.