NetComm IG6000 User Manual
Industrial Modem User Guide
When the terminal asserts the DTR signal (DTR makes an OFFON transition), your modem will dial stored phone
number zero. The phone number may contain dial modifiers.
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.
Leasedline 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, dialup, voice (PSTN)
Before commencing leasedline communications, it is recommended that a nonautoranging B setting be specified.
If error correction is required, select a Reliable mode, not an AutoReliable mode. (See the \N command.)
Autoranging and fallback are disabled in leasedline 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 leasedline 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 leasedline mode via the AT&O
command. Alternatively, this command can be sent with DTR low.