To Determine Why There Is No Dial Tone At The Ata2; To Check The Ata2 Wiring; Reset To Factory Settings - Nortel BCM50 Installation And Maintenance Manual

To determine why there is no dial tone at the ATA2

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 ATA2 unit:
a
Disconnect the line side of ATA2. Connect a digital telephone to the ATA2 port.
b Check that the connection from ATA2 to the BCM50 hardware is functioning correctly.

To check the ATA2 wiring

1 Use an analog phone to test the ATA2.
2
Check the following connections:
a ATA2 to the terminal
The resistance must be 200 ohms or less for data applications and 1300 ohms or less for
voice applications.
b BCM50 hardware to ATA2
The wiring must be equivalent to 800 m of 0.5 mm wire (2600 ft. of 24 AWG) or less. Do
not use bridge taps and loading coils between the BCM50 hardware and ATA2.

Reset to factory settings

This section describes how to reset the BCM50 system to the factory settings or a stable working
condition using the reset switch (see
modifications can be made.
Figure 61 Reset switch location
Some possible situations to use the reset feature are:
• The BCM50 system might have been mis-configured to an extent that it is no longer
functional. Reset level 1 allows the customer to move to the default system programming,
where the customer can restore a previous configuration or reconfigure the system.
• Distributors might want to re-use BCM50 systems. They must first erase all customer-specific
data using level 1 or level 2 reset.
Chapter 18 Testing basic BCM50 functionality
Figure 61). Once the BCM50 is in this condition, further
Reset switch
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