To Measure The Insertion Loss From The Co To The Analog Device; Test Insertion Loss Measurement - Nortel N0060609 Installation Manual

26 Chapter 4 Installing the analog terminal adapter
Figure 7 ATA2 back view

Test insertion loss measurement

The maximum loss for ATA2 to Central Office (CO) configuration must not exceed 10 dB (see
Figure 8 on page
Figure 8 Insertion loss from the CO to the analog telephone
BCM main unit
Central Office
cable loss
BCM to ATA 2
ATA 2 to BCM
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.
N0060609 0.3 N0060609 0.3
Mounting keyhole slots
26).
10 dB Max
50 dB
60 to 4,000 Hz
With IEEE 455-1976 test
3 dB
ATA 2
Cable loss
Analog telephone