Nortel Networks BCM50 - Manual (Page 123)

Chapter 11 Installing the analog terminal adapter 123
Installation and Maintenance Guide
To measure the insertion loss from the CO to the analog device
1 Establish a connection to the 1 mW, 1 kHz, CO service line with an analog telephone attached
to the ATA2.
2 Ensure that the analog port terminates correctly in 600 ohms:
• Replace the analog telephone with the test set.
• Use RECEIVE/600 OHM/HOLD mode on the test set.
3 Ensure that the test set connects in parallel to the service line before removing the analog
telephone or the line drops.
4 Remove the single-line telephone.
5 Measure the 1 kHz tone at the far end of the analog port, where the analog loop ends and
where the analog device connects.
To measure the insertion loss from the analog device to the CO
1 Establish a connection to a silent termination on the CO service line with an analog telephone
attached to the ATA2.
2 Make sure the analog port terminates correctly in 600 ohms by:
• Replace the analog telephone with the test set.
• Use TRANSMIT/600 OHM/HOLD mode on the test set.
3 Make sure the test set connects in parallel to the service line before removing the analog
telephone or the line drops.
4 Remove the analog telephone.
5 Introduce a 1 kHz tone into the analog line at –10 dBm, and measure the level at the CO
exchange.
Configuring the ATA2
Configure the ATA2 using Element Manager or Telset Administration. For detailed configuration
information, see the
Device Configuration Guide.
Note: The tone must be greater than –10 dB (for example: –9 dB is acceptable).
Note: The difference in levels is the transmit loss and must be less than 10 dB
(for example, 9 dB is acceptable).