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Chapter 15 Troubleshooting 297
Installation and Maintenance Guide
Check the ATA 2 wiring
Check the following connections:
1 ATA 2 to the terminal. The resistance must be 200 ohms or less for data applications and 1,300
ohms or less for voice applications.
2 Business Communications Manager system to ATA 2. The wiring must be equivalent to 800 m
of 0.5 mm wire (2,600 ft. of 24 AWG) or less. Do not use bridge taps and loading coils
between the Business Communications Manager system and ATA 2.
3 External line to the Business Communications Manager system. Ensure the external line is
correctly connected to the Business Communications Manager system and make sure there is
dial tone.
4 This procedure is complete.
Check for dial tone at the ATA 2
Check to ensure there is dial tone from the set and from the ATA 2 module.
1 If there is no dial tone, replace a single-line telephone for the data communication device.
2 If there is no dial tone at the ATA 2 unit:
a Disconnect the line side of ATA 2. Connect an Business Communications Manager
telephone to the ATA 2 port.
b Check that the connection from ATA 2 to the Business Communications Manager system
is functioning correctly (the telephone has dial tone).
3 This procedure is complete.
Check for trunk line dial tone to the ATA 2
Use the following steps to check for trunk line dial tone to the ATA 2.
1 Disconnect ATA 2 external line from the Business Communications Manager system and
connect the data device directly to this external line.
2 Make a call.
3 If the problem continues, the device or the external line is possibly at fault.
4 Plug the device into a different line.
5 If the problem continues, the device is possibly at fault.
6 This procedure is complete.
For more information about ATA 2, contact your customer service representative.