US Robotics USR4204 Guide de l'utilisateur télécharger pdf (Page 13)

USR4204 User Guide

Page 13 of 69

Carrier Detect Signal - Active

The RS-232 Carrier Detect signal should be active (not overridden) so the USR4204 will

automatically present its Main Menu upon connection and automatically close ports upon

disconnection.

Error Correction - Enabled

Enable Error Correction to allow the sending of V.42 flow control messages to the other

modem if the receive buffer fills.

Xon/Xoff Flow Control- Enabled

Enable Xon/Xoff flow control in the modem if the USR4204 has flow control enabled.

Enable Xon/Xoff flow control in the USR4204 and in the modem to prevent

buffer overflow for any of these situations:

 The equipment being managed through the USR4204 uses serial

rates different from 9600bps

 USR4204 batch configuration files are larger than 1500 characters

 USR4204 linefeed pacing is enabled

AT Commands - Disabled (a.k.a. “Dumb Mode”)

After all other configuration commands are set and stored, disable AT Commands to prevent

messages from the USR4204 from causing a key-press abort of a pending modem

connection. Disabling AT commands is typically done by flipping a physical switch on the

modem.

Cabling the Analog Modems

Once the analog modem deploying at the equipment site has been properly configured, it

may be attached to the USR4204 terminal port and telephone line.

Modem Connector

Adaptors and Cables Needed

DB25F

Provided DB25 Adapter and provided RJ45 rollover cable.

DB9F

Select one of the following:

 Purchase a RJ45-to-DB9M null modem adaptor and use

the provided RJ45 rollover cable.

 Purchase a RJ45-to-DB9M adaptor and use a straight

Ethernet cable.

 Purchase a DB25F-to-DB9M adaptor and use the

provided RJ45-to-DB25M adaptor and RJ45 rollover

cable.

 See appendix A for the wiring diagrams for all options.

RJ11

Use a phone cord with an RJ11 plug on one end, and a plug on

the other end to suit your regional phone socket.

Connect the analog modem deploying at the management site to the management terminal

COM port with a suitable RS-232 serial cable.

The setup is now ready to remotely manage the attached equipment.

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US Robotics USR4204 Guide de l'utilisateur Page 13

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