0049-0117-100 DSP9612 Flash Poll Modem – User Guide
10/12/2011
Rev. F1
Page 26 of 44
Connecting to a Transmission Line
The modem has a transmission line interface that can be configured for 2-
or 4-wire, analog connection, where one pair is used to transmit data (Tx
and Tx) and one pair is used to receive data (Rx and Rx). Table 2-7 shows
the pin numbers and corresponding signals for the modem. Figure 2-4
shows the transmission line interface.
Note:
For communication to occur, the Rx line of
one modem must connect to the Tx line of the
other modem. The modem’s Tx/Rx pair is
non-polarized.
Note:
The modem does not support leased-line
operations with DC current.
Table 2-7. Transmission Line Connector Pin Assignments
This Pin
Number…
Corresponds to This
Signal…
1 Rx
2 Rx
3
Tx
4 Tx
RM Model RJ45
3
4
Rx
4 Tx
5 Tx
6 Rx
Содержание DSP9612
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