System 3505  
Network  
Multiplex  
DGM-32/64  
DGM-32M-RLY  
DGM-32/64-RLY  
DGM-8LS/16LS  
DGM-ISO-8L  
ISO-6Z  
DGM-8/16LS-4X  
Muxpad II  
FACP Interface  
Lightning  Protection Board  
External Keypads  
32-Line Driver  Rack  
Polling Radio  
Single Line  Output  
Configurator  Cards  
Q-Mux  
DDI-9E  
Direct-Wire Inputs
 
Telegraph  
1221 Radio  
Outputs  
CGRMS  
System 4000  
System 3505C
System 4000DL
CCTV
Desplex®

Used in DGM-8/16LS for extending zone input distance.