Telenetics MIU56 manual Leased Line Operation

Industrial Modem MIU56 User Guide

To return to asynchronous mode:

•Type: AT&M0 <E>

Your modem will remain in asynchronous mode.

Leased Line Operation

A leased line, or private line, is a telephone line that permanently connects two or more locations. The leased line does not have any switching equipment associated with it.

Leased-line operation with the modem is selected with the &L command.

If you select leased line operation with the &L1 command, you must issue the ATA command to answer a call, and the ATD command to initiate a call.

If you use &L2 or &L3 to select Auto leased line operation, you do not need to issue the ATA or ATD commands; &L2 selects Originate mode automatically and &L3 selects Answer mode automatically. To dial or answer, raise DTR; to hang up and return to local command state, lower DTR.

+You will require a special phone cable (available from your dealer) to connect your modem to a leased- line socket. The phone cable supplied with your modem is suitable for use with normal, dial-up, voice (PSTN) lines.

Before commencing leased-line communications, it is recommended that a non-auto-ranging B setting be specified.

+If error correction is required, select a Reliable mode, not an Auto-Reliable mode. (See the \N command.)

Auto-ranging and fallback are disabled in leased-line mode. Your modem will only attempt to connect using the communications standard specified by the B command and the terminal speed.

Once a connection has been established, if your modem detects a loss of carrier it will continuously attempt to re- establish the connection.

If the modem is in auto leased-line operation and this configuration has ben stored in memory using the AT&W command, a timeout period of 10 seconds is available after power up to disable the leased-line mode via the AT&O command. Alternatively, this command can be sent with DTR low.

MIU56Robert Way Page 11 2/28/2003