Phone Cord Connection

Connect one end of a D161 (8') or D162 (2') Telephone Cord to the D9112 TELCO Cord connector, J3, located on the bottom left corner of the D9112. See Figure 7. Connect the other end to the RJ31X jack.

Phone LED (Red)

The red Phone LED lights when the panel seizes the phone line and remains lit until the panel returns the phone line. See Figure 7 for the location of the red LED.

Operation Monitor LED (Green)

The green LED indicates the operation of the CPU (Central Processing Unit). When the CPU is operating normally, the LED flashes 0.5 second on, 0.5 second off.

The green LED also serves as a ring indicator. See Figure 7 for the location of the LED. When there is ring voltage on the phone line (the phone is ringing), the green LED flickers at a faster rate for the duration of each ring. Ring voltage must reach a minimum of 45 VAC before the D9112 detects it.

Dialing Format

You can program the D9112 to use DTMF or pulse dialing. See Phone Parameters in the D9112 Program Entry Guide (74-06145-000).

Phone Line Monitor

The D9112 panel has a built-in phone line monitor that tests the phone line for voltage and current. If you use the D128 Dual Phone Line Switcher to connect 2 phone lines to the D9112, the panel monitors both lines. The normal voltage on a telephone line is approximately 48 VDC (24 VDC for some phone systems). The phone line monitor senses trouble when the voltage on the line falls below 4.5 to 7.5 VDC, without a corresponding current increase to 8 to 13 mA.

If the monitor senses trouble, it starts a programmable phone line trouble timer. The timer continues to run as long as the monitor senses trouble. It resets to zero when the panel senses a normal line. If the timer reaches the delay time in the Phone Supervision program item, it begins a phone line trouble response. Programming determines what the response is. See Phone Parameters in the D9112 Program Entry Guide (74-06145-000).

The panel stops monitoring the phone line during its phone line trouble response. If the response includes sending a report, the panel does not resume monitoring until the report is acknowledged or it goes into communication failure.

Bad line may test OK: The telephone line monitor uses voltage and current levels to test the status of the phone line. In some instances a given telephone line may be out of service without affecting the voltage on the line. The phone line monitor can not recognize this trouble condition.

 

D9112 Operation & Installation Manual

 

74-06144-000-C 2/96

Page 28

© 1993-1996 Radionics

Page 28
Image 28
Bosch Appliances D9112 Phone Cord Connection, Phone LED Red, Operation Monitor LED Green, Dialing Format