Testing Insertion Loss Measurement From The Co To The Analog Device; Prerequisites; Procedure Steps; Testing Insertion Loss Measurement From The Analog Device To The Co - Nortel Business Communications Manager 450 Installation Manual

88 Analog terminal adapter installation

Testing insertion loss measurement from the CO to the analog device

The maximum loss for ATA2 to Central Office (CO) configuration must not
exceed 10 dB, and must be greater than —10 dB.
Measure the total insertion loss between the CO and analog device by using
standard dial-up test lines with a transmission test set.

Prerequisites

• You will need a transmission test set (for example, Hewlett-Packard 4935A
Transmission Test Set).

Procedure steps

Step
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Testing insertion loss measurement from the analog device to the CO

The maximum loss for ATA2 to Central Office (CO) configuration must not
exceed 10 dB and must be greater than —10 dB.
Measure the total insertion loss between the CO and analog device by
using standard dial-up test lines with a transmission test set.
Prerequisites
• You will need a transmission test set (for example, Hewlett-Packard 4935A
Transmission Test Set).
Procedure steps
Step
Copyright © 2006-2009 Nortel Networks
Action
Establish a connection to the 1 mW, 1 kHz, CO service line with an analog
telephone connected to the ATA2.
Replace the analog telephone with the test set.
Use RECEIVE/600 OHM/HOLD mode on the test set.
Ensure that the analog port terminates correctly in 600 ohms.
Ensure that the test set connects in parallel to the service line before you
remove the analog telephone or the line drops.
Remove the single-line telephone.
Measure the 1 kHz tone at the far end of the analog port, where the analog
loop ends and the analog device connects.
Action
Nortel Business Communications Manager 450 1.0
Installation — System
NN40160-301 01.04 Standard
July 2009
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