Digital Monitoring Products, Inc. | Troubleshooting Guide 11
PHONE LINE 1 TROUBLE - XR150/XR550 PANELS
XR Series panels monitor telephone line voltage� When the voltage falls below 3 VDC, the panel generates a PHONE LINE 1
TRBL�
If you are using a Model 893-A Dual Phone Line Module and the voltage falls below 3 VDC, the panel generates a PHONE
LINE 1 TRBL or PHONE LINE 2 TRBL, depending on which line has a problem� Here are some things to check:
CHECK PHONE LINE VOLTAGE
1
Set your multi-meter to DC voltage�
2
With the panel still connected to the RJ-31X, place meter-leads on pins 4 & 5� If properly wired for line seizure,
this should be your incoming dial tone�
3
Check voltage� When the panel is ON-HOOK (not dialing) this voltage should read somewhere between 45 and
55 VDC�
4
Make the panel go OFF-HOOK (an easy way to do this is to remove and replace the tamper jumper) and read
the phone line voltage again�
Note: If the phone line voltage drops below 3 VDC, the problem lies with the phone line� If it does not drop
below 3 VDC, try BYPASSING THE 893A� To do this:
1
Place a jumper wire across pins 2 & 7 of the RJ-31�
2
Disconnect the short RJ cable (between panel J3 and 893A) from the panel�
3
Unplug RJ cable from 893A’s MAIN (Remove BACKUP for PH LINE 2 TRBL), plug into panel’s dialer
connection�
4
Wait up to two minutes for PH LINE TRBL to clear�
DOES PH LINE TRBL CLEAR?
YES - Replace 893A Module� Be sure to power down the panel first�
NO - Enter PROGRAMMING and initialize EVENTS� This should clear the display� Wait at least two minutes after
initializing EVENTS to make sure that the PH LINE TRBL does not return�
Note: Initializing EVENTS erases ALL EVENTS in the Event Buer�
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