Specifications

Chapter 4 Connecting with Direct Dial
Configuring Direct Dial on the JACE-4/5
Niagara Release 2.3
Niagara Networking & Connectivity Guide Revised: May 22, 2002
4–7
• set up multiple modems on a single Web Supervisor to handle additional
incoming and outgoing calls. However, this requires the server version of the
Windows operating system (either Windows NT 4.0 Server or Windows 2000
Server).
• add additional Web Supervisors or JACE-NPs.
Configuring Direct Dial on the JACE-4/5
This section guides you through installing and configuring modems and configuring
the Niagara software for direct dial on the JACE-4/5. It has the following topics:
• Installing and Configuring Modems
• Configuring the Software
Installing and Configuring Modems
Because they both use the VXWorks OS, the procedures for installing and
configuring modems on the JACE-4 and JACE-5 are similar. However, there are
some dissimilarities:
• The JACE-5 only supports external modems attached to an RS-232 port. The
JACE-4 supports either an on-board (internal) modem or an external one.
• Configuring the JACE-4 requires an extra step because, by default, the
on-board modem is not enabled. See the “Enabling the JACE-4 Modem
(Internal or External)” section on page 4-10.
The following sections will help you configure modems on either the JACE-4 or
JACE-5:
• About Pre-configured Modems
• Enabling the JACE-4 Modem (Internal or External)
• Attaching an External Modem
About
Pre-configured
Modems
By default, the following modems are configured on the JACE-4 and JACE-5:
• JACE-4—Cermetek 2056 ET (its internal modem)
• JACE-5—U.S. Robotics Sportster
In addition, the the “About the ras.properties File” section on page 4-12 provides
information about using a Zoom External V.90 Dualmode Faxmodem (Model
2949L).
While it is possible to connect modems of other types or brands, doing so may cause
you some configuration difficulty. Modem configuration on the JACE-4/5 requires a
modem initialization string which sets parameters that we require for proper
operation. We provide the initialization string for the above referenced modems, or