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280 Chapter 13 Install Analog Terminal Adapters
P0993133 03
5 Introduce a 1 kHz tone into the analog line at - 10 dBm, and measure the level at the CO
exchange.
6 This procedure is complete.
Connect the Business Communications Manager ATA 2
After you have determined that the proper environment exists, connect the ATA 2 to the line and
set. Refer to Figure 179.
Figure 179 Single line telephone installation overview
Figure 180 shows the pinouts for the connection cables.
Figure 180 ATA 2 pin outs
Note: The difference in levels is the transmit loss and must be less than 10 dB
(for example, 9 dB is acceptable).
Single-line telephone
ATA 2
Business Communications Manager
Line loop resistance:
135 ohms maximum
Terminal loop resistance:
1300 ohms maximum
Central
Office
ATA 2 power cord
TCM*
TCM*
Ring (B-Lead)
Tip (A-Lead)
Line Jack
Terminal Jack
* The TCM input is not polarity sensitive.