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284 Chapter 13 Install Analog Terminal Adapters
P0993133 03
ATA 2 Data Communication
The Business Communications Manager ATA 2 connects a standard analog data device, such as a
FAX or modem, to the Business Communications Manager system. This section shows the
additional steps required to install ATA 2 for data communication.
Data transmission requirements
When using the Business Communications Manager ATA 2 for data transmission, the analog loop
resistance must not exceed 200 ohms. (for example: 730 m of 0.4 mm wire or 2,400 ft. of 26 AWG
wire.)
The external line assigned to the 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.
FAX and modem transmission compatibility
The Business Communications Manager ATA 2 is compatible with all commercial FAX and
modem protocols. When connected to an ATA 2, the Business Communications Manager system
supports data transmission rates a maximum of and including 28.8 kbit/s.
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.
Note: Nortel Networks cannot guarantee the maximum data transmission rate because the
maximum rate is subject to the quality of the end-to-end channel.