User's Guide

2110059 Rev 1.1 Proprietary and Confidential Page 65
7. Wireline Operation
7.1. Introduction
Wireline data mode is that most commonly associated with computer communications: the modem
is connected via a telephone line. Only the SB320 supports this mode.
This section provides information on configuring and using the SB320 modem in Wireline data
mode if you are not using Watcher and Windows Dial-up Networking for your connections. If
you are using a standard Windows-based application then consult Section 3.3 Configuration using
WirelessExpert.
For details on Wireline Voice operation see Section 8 Voice Operation in CSC and Wireline.
7.1.1. Hardware
To connect the SB320 to a telephone line the 13-pin I/O connector is used. Pins 12 and 13 are the
wireline RING and TIP respectively.
For testing purposes, the MIB supports connection of the SB320 to a telephone line with a RJ-11
connector (PSTN). The SB320 I/O connector must also be in place.
CAUTION
The telephone connection must be to a standard analogue telephone line. Locations
which have an internal PBX telephone system may use digital telephone lines
internally. Digital lines will NOT work with the modem.
The modem’s load number (5B) is noted on the modem’s back label.
7.2. Configuring the Modem for Wireline
The modem does not require any special configuration for Wireline mode. The modem is placed
in Wireline mode by setting +WS46=1.
7.2.1. Connecting to another Wireline Modem or Modem Pool
The factory settings (&F0) are fine for wireline operation. The modem will enable all protocols
up to V.34. ETC for cellular connections is disabled by default.
7.2.2. Connecting to a Cellular Modem
If the destination modem is on a cellular network, you should familiarize yourself with the
considerations discussed in Sections 4.4 and 4.5 on protocols and handshaking. The discussion on
CSC in the section above is also worth reading to understand the kinds of issues that can arise.
For these types of connections you should issue the “super” AT command &F6 which
automatically includes additional setup commands as follows:
\N3 Enables V.42 LAPM error control but also allows MNP and will even tolerate a
non-error controlled link. This allows for both a direct ETC connection to the
destination and a non-ETC connection to a modem pool. A setting of 2 is also
possible if you want to disconnect if neither LAPM nor MNP error control can be
negotiated.