Nortel Networks BCM1000 Benutzerhandbuch

Chapter 12 Installing Analog Terminal Adapters

Installation and Maintenance Guide

 shows the hardware configuration for connecting an analog device through an ATA 2 to 

the Business Communications Manager.

Figure 59   Analog telephone installation overview

external line to ATA 2

must follow the transmission network requirements 

described in the data communication device specifications

transmission rates (baud)

over 1,200 bps require a modulation design compatible 

with the telephone line bandwidth. Use a conditioned 

external line to prevent data corruption during transmission
Note: Maximum loss from the ATA 2 analog terminal to the 

CO must be 10 dB or less at 1 kHz. If the loss exceeds this 

limit, condition the line. This loss ensures correct data 

transmission for different types of data terminals.

Analog telephone

ATA 2

BCM1000

Line loop resistance: 
135 ohms maximum

Terminal loop resistance: 
1300 ohms maximum

Central 
Office

ATA 2 power cord