Guardian Technologies DFT 150/175 Home Security System User Manual


 
6.2 Demo Cable
This cable allows two DVST units to be connected back to back without the need for
connection to MODEMs or Terminal Adapters.
Tech Note:
This is a synchronous balanced transmission. Transmit and receive lines therefore
cross yet maintain polarity. The flying lead is used to source a clocking signal from the
MODEM port.
Page 14 Dedicated Micros Ltd
Demonstration Mode DVST Installation Guide
Fig: 3 Wiring details for demo cable