Operating instructions
TransTel TD-1648i / TDS-600 Programming Manual 
81
Form 06-01 - Relay Assignment Form 
TD-MSC card has 1 dry contact relay. 
No voltage is provided by the system, the installer will have to provide their own source to suit the 
application. Only use the relays to switch 24V. They are only designed for low voltage control circuits. 
All Relays are Normally Open contacts and will close on activation of the function for which they have 
been programmed. 
00-10 
Valid Settings: 
00=Non-Operational (Default)  04=CO Line Loud Bell 
01=Music On Hold  05=Station Loud Bell 
02=Door Latch Release  06=System Alarm 










