To Measure The Insertion Loss From The Co To The Analog Device; Test Insertion Loss Measurement - Nortel BCM50 Installation And Maintenance Manual

120 Chapter 11 Installing the analog terminal adapter
Figure 50 ATA2 back view

Test insertion loss measurement

The maximum loss for ATA2 to Central Office (CO) configuration must not exceed 10 dB (see
Figure 51 on page
Figure 51 Insertion loss from the CO to the analog telephone
Central
Office
Longitudinal balance to ground
Overload level
Measure the total insertion loss between the CO and analog device by using standard dial up test
lines with a transmission test set. For example, Hewlett-Packard 4935A Transmission Test Set.

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
N0027152 01 N0027152 01
Mounting keyhole slots
120).
BCM50
ATA2 to BCM50
10 dB Max
50 dB
60 to 4,000 Hz
With IEEE 455-1976 test
3 dB
ATA2
Cable loss
BCM50 to ATA2
Analog telephone