ZyXEL Communications U-90E, Руководство пользователя

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U-90E Data/Fax Modem
Leased Line Operation
7-1
Chapter 7
Leased Line Operation
A leased line is a permanent telephone line connection between two fixed points. It can be
dedicated copper wires or a leased telephone circuit from the telephone company. U-90E
supports only 2-wire leased lines. Two-wire leased lines transmit and receive on the same
pair of wires.
7.1 Connecting to a Leased Line
The leased line jack of U-90E is the same as dial-up line. You can connect leased line to
the dial-up line jack. The leased line phone jack pin assignments are shown in the
Appendix.
7.1.1 Line Type Setting
Table 7-1 AT Command to Set Line Type
AT-Command Description
AT&L0 The modem is connected to a dial-up line.
AT&L1 The modem is connected to a 2-wire leased line.
7.1.2 Power Level Setting
Your modem’s leased line mode transmission power level can be adjusted from 0 dBm to
-31 dBm in 1 dBm increments.
Table 7-2 AT Command to Set Power Level
AT-Command Description