System 3505  
Network  
Multiplex  
Q-Mux  
DDI-9E  
Direct-Wire Inputs
 
Telegraph  
1221 Radio  
Outputs  
CGRMS  
System 4000  
System 3505C
System 4000DL
CCTV
Desplex®  
Processes dialer alarm, trouble and restore signals from digital dialer transmitters through a dial-up telephone network. Caller ID printout with available service from your telephone company. Supervises the telephone line to verify the connection, and eight configuration tables permit the user to define incoming signals. The required dialer option provides the System 3505/3500/3000 with up to 1600 subscriber capacity. Up to 4 DDI-8 cards can be plugged into the System 3505/3500/3000, each with a separate phone jack on the rear of the System 3505/3500/3000 unit, each card monitoring a single phone line.