Troubleshooting A Base Station - Northern Telecom Meridian 1 Installation And Maintenance Manual

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Note: You should find between 18 and 21 V DC across the telephone wires

Troubleshooting a Base Station

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Replace the Administration Terminal with a working Administration
Terminal. If the problem persists (see "Troubleshooting" on page 171).
when the Administration Terminal is disconnected.
Verify that the green LED (the power indicator) is on.
Verify that the red light is not solid.
A solid red light indicates that both radios on the Base Station are busy
with calls, the system is in a Maintenance state, that the system is
downloading data to the Base Stations, or that the radios have not been
assigned to a cell.
Verify that the red light is not flashing.
The red LED flashes for about 15 seconds when a Base Station is
powered up. This is normal. If the red LED continues to flash, then one
of the following problems may exist:
The Base Station is not connected to the Controller or line card.
The wiring to the Base Station is not correct. Check for open circuits
through the secondary protectors for applications with exposed wiring.
The two-way DC loop resistance of the power pair(s) between the RPI
and the Base Station exceeds 100 Ω. Measure the loop resistance with an
ohmmeter. If the resistance exceeds 100 Ω, install a second power pair.
The Base Station or RPI is faulty.
If the red LED is flashing on multiple Base Stations, one of the following
problems may exist:
The CMCC, CMRC, or CMBC card associated with the Base Stations
may not be in place.
The MDF cable may have been removed.
Verify that the power cord of the RPI is properly connected to a working
AC outlet. If the Base Station is powered locally, verify that the power
Meridian Companion Installation and Maintenance Guide
Troubleshooting Page 177 of 220