Trilogy Touch Technology 500-19-54 manual Introduction, Imp, Dial Tone / K-Break, Reset Switch

500-19-54 Dual Channel Telephone Interface

6.500-19-21 DUAL HYBRID SET-UP

6.1Introduction

The 500-19-21 card carries two identical circuits and is controlled by the 700/500-19-00 interface cards and/or the front panel controls (see the previous section for information on the controls). Jumpers on the card allow matching to different line and exchange conditions as shown below. For details on the positions of the jumpers, please refer to the circuit board legend.

6.4

6.5

6.3

6.2IMP

6.2

6.2

6.3

This jumper allows matching of the line impedance to “CTR21”, to 600R or to a custom network by fitting components onto a plug-in header “Net1/2”. If you are not sure which setting to use , try both “CTR21” and 600R and select the one with the best match to your line impedance, that is the setting with least voice feeding back.

6.3Dial Tone / K-Break

In auto mode the line hold condition can be dropped automatically on detection of continuous dial tone for 6 seconds or by the detection of a break in the line current generated from the exchange, (called K break).

With the jumpers fitted these signals will be detected. In some uses the automatic clearing by one or both methods might be a problem and the required jumper can be removed to disable detection.

6.4Reset Switch

You can return the card to Factory Default by pressing and holding the button for about 6 seconds. It will give 10 slow flashes and then speed up. When it speeds up let go and it will be reset.

6.5Programmable Port This is for factory use only.

The Trilogy Dual Hybrid frame should only be connected to a Line via an appropriate approved fuse disconnection barrier.

Trilogy Communications Limited Issue 1.2 Page 17 of 19