Private Line Operation; 4-Wire Operation; 2-Wire Leased Line Operation - Motorola V.3400 User Manual

AT Commands

PRIVATE LINE OPERATION

Note
For a 2- or 4-wire leased line connection to succeed one
modem must be configured as forced answer and the other
modem as normal originate. Both modems should have only
one protocol, MNP or LAPM, enabled and PROTOCOL
FALLBACK must be disabled. DCE line speed must be the
same for both modems.

4-Wire Operation

In 4-wire operation, the modem is a full-duplex, leased-line modem
requiring a dedicated 4-wire leased line. Only point-to-point dedicated
leased lines are supported. The 4-wire leased line connects to the AUX
jack on the modem rear panel. Dialing is not necessary. When connected
via leased line the modems will train and begin communicating with
each other. The LINE jack can be used to connect a 2-wire dial-up line
for dial backup.
Note
The V3229, V3227, V3225, and V3257 modems use V.33 as
the modulation type. The V.3400 must be set up to V.33 to
connect to these modems.
2-Wire Operation
In 2-wire operation, the modem is a full-duplex modem able to operate
over 2-wire leased or PSTN lines.

2-wire Leased Line Operation:

The 2-wire leased line is connected to the AUX jack; the LINE jack
connects to a 2-wire dial-up line for dial backup. The leased line
connects the local and remote modems directly and dialing is not
necessary. One of the modems must be configured for forced
answer and the other for normal originate. When connected via
leased line the modems will connect and begin communicating with
each other.
The &L command is used to select Private Line (leased line) oper-
ating mode. The *OR commands selects the origination or answer
mode when operating in the leased line configuration.
5-34 V.3400