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Troubleshooting
Problem
Possible Cause & Solutions
Command Center
will not power on:
• Check wires for voltage. It should be 28vdc
• If no voltage is detected, confirm you are connected to the DKP port
on the Distribution Module
• If you have 48vdc, you are incorrectly connected to an SLT port
Emergency Phones
will not call out:
• Check wires for voltage. It should be 48vdc
• If no voltage is detected, confirm you are connected to the SLT port
on the Distribution Module. Note: some SLT ports only use the blue
and orange pairs
• If you have 28vdc, you are incorrectly connected to the DKP port
• Make sure you dial any access digit that may be required to dial out
of your building
Phone will make
internal calls, but not
external calls:
• Check the phone line is connected to the correct port on the
Distribution Module
• Verify the phone line by making sure it has 48-52vdc on the line and
use an analog phone to verify you are able to call in and out
Insufficient volume
on call boxes:
• To adjust the volume on SmartPhones, turn the VR1 port
• To adjust the volume on 2400 Phones, use the VOL key
Lights continuously
blink on button for
call box:
• The phone is not properly hung up. Lift the Command Center
handset, select the blinking light, then hang up the handset
Lights periodically
blink on Command
Center:
• This indicates the phone is doing a phone line check. This is a
normal function of the system and no action is needed
• To disable this function, refer to the SmartPhone Programming Guide
