Guardian Technologies CIT-40 ユーザーズマニュアル

 

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The CIT-40 is shipped from the factory set for DTMF (Tone) dialing mode.  If 
loop disconnect (Pulse) dialing is required proceed as follows.

 

 

•  Carefully remove the front cover assembly and separate from the housing by 

disconnecting the harness plug.  NOTE that the handset and all electronics 
are attached to the front plate.

 

•  Move the jumper from pins 1 & 2 to pins 2 & 3. 

•  The set will now be in pulse dialing mode, it can be returned to tone mode 

by moving the jumper back to pins 1 & 2. 

•  Carefully replace the front plate and install all eight screws.  Do not over 

tighten the cover screws, there is a flexible gasket between the cover and 
the body.  Excessive tightening of the screws deforms the gasket and 
reduces the weather resistance of the set. 

 

•  Disconnect the telephone from Tip and Ring power supplied by the PABX or 

central office before attempting to replace the fuse. 

•  Carefully remove the front cover assembly and separate from the housing 

by disconnecting the harness plugs.  NOTE that the handset and all 
electronics are attached to the front plate.

 

•  Replace fuse in fuse holder. 
•  Carefully replace the front plate and install all eight screws.  Do not over 

tighten the cover screws, there is a flexible gasket between the cover and 
the body.  Excessive tightening of the screws deforms the gasket and 
reduces the weather resistance of the set. 

WARNING! 

•  Replace only with a 0.25 amp 3AG fast blow fuse. Failure to do so will void 

the warranty. 

•  If, on reconnecting power, the fuse fails, check the telephone system wiring. 

The fuse protects the Tip and Ring line from the telephone system. It is 
usually powered at 48 volts DC and must not be connected to 120 volts AC.