Extreme Networks Alpine 3804 Manuel

Modem String Configuration for Remote Access

This document is intended to provide the necessary steps for adding a modem for remote access.

Required Equipment:

• Modem

• Modem power supply

• RJ-11 phone patch cable

• 9-pin male-to-25-pin female serial cable

• Analog phone line

• AC power source

Generic Hardware Configuration

Warning

– When attempting to connect a modem to a BlackDiamond MSM console port, make sure to plug the

external modem into the console port not the modem port. The MSM modem port does not function with

external modems attached.

Connection to the console port is used for direct local management. The console port

Settings are configured as follows:

• Baud Rate: 9600

• Data Bits: 8

• Stop Bit: 1

• Parity: None

• Flow Control: XON/XOFF

For best results, an AT initialization string should be customized for the modem. This can be obtained from the

modem documentation or the modem manufacturer.

The modem must be attached to the Extreme box to do the following:

• Raise DCD (Data Carrier Detect) when a call comes in (typically &C1)

• Ignore DTR/DTR Override (typically &D0)

• Use XON/XOFF software flow control (typically &K2 or &K4. &F2 on some USRs)

• Answer on the first ring (typically S0=1)

>>>

Laptop Computer

US Robotics 33.6 External Faxmodem model 839

or Hayes Accura 336 Fax Modem

AC Power Supply RJ-11 Telephone

Patch Cable 9-pin Male-to-

25-pin Female

Serial Cable

Remote Dial-up Connection

Depending on what type of modem you have, it may be necessary to lock down the DTE speed to 9600. Some

modems require a special AT command or dipswitch setting to lock the DTE speed. Check the manual for

your modem.

US Robotics 33.6 external fax/modem model 839

Modem-speciﬁc conﬁguration parameters:

• Connect modem to PC/laptop, launch terminal session.

• Enter the following command string (ﬁxes serial port speed and writes new conﬁg to default memory

location): AT&B1&W

• Turn off and disconnect the modem.

• Change the dip switches to the following:

1 – Down* DTR override

2 – Up Verbal result codes

3 – Up Suppress result codes

4 – Down No echo, ofﬂine commands

5 – Up Auto answer on ﬁrst ring

6 – Up Carrier detect normal

7 – Down Load NVRAM defaults

8 – Up Dumb mode

*Down correlates to the underside of the modem chassis. Up correlates to the top of the chassis.

• Reconnect equipment according to the diagram above.

Hayes Accura 336 fax/modem

Modem-speciﬁc conﬁguration parameters:

• Connect modem to PC/laptop, launch terminal session.

• Enter the ﬁrst command string: AT&F&C1&D0S37=9S0=1&W

Parameter Explanation

&F – Clear previous conﬁguration by setting modem to factory default

&C1 – Normal CD Operations

&D0 – DTR Over-ride

S37=9

S0=1 – Set auto answer to ﬁrst ring

&W – Write conﬁguration to memory

• Enter the second command string: ATQ1&W

Parameter Explanation

Q1 – Suppress Result Codes

&W – Write additional parameter to memory

• Turn off and disconnect the modem.

– Reconnect equipment according to the diagram above.

Veriﬁed Modem Init Strings

Dynalink Model 1456ER2

The string is: AT&F&C1S37=9S0=2Q1&D0&W

&F – Restore to factory default

&C1 – Carrier detect set to normal

S37=9 – Other than PC connection

S0=2 – Auto answer after 2 rings

&D0 – DTR ignored. Allows operation with DTE that does not provide DTR.

&W – Write conﬁg to memory

Hayes Accura 56K Model 4703US

The string is: AT&C1&D0&K4S0=1&W

&C1 – Carrier detect set to normal

&D0 – DTR ignored. Allows operation with DTE that does not provide DTR.

&K4 – Use XON/XOFF ﬂow control

S0=1 – Auto answer after 1 ring

&W – Write conﬁg to memory

US Robotics Courier V.Everything 33.6/28.8

The string is: AT&F2&C1&D0S0=1&W

&F2 – Load Software Flow Control template settings

&C1 – Carrier detect set to normal

&D0 – DTR ignored. Allows operation with DTE that does not provide DTR.

S0=1 – Auto answer after 1 ring

&W – Write conﬁg to memory

Dip Switch Settings

Dip Position Purpose

1 ON DTR Always On

2 OFF Verbal Result Codes

3 OFF Suppress Result Codes

4 OFF Echo Ofﬂine Commands

5 OFF Auto Answer ON RING

6 OFF NORMAL CARRIER DETECT

7 OFF DISPLAY ALL RESULT CODES

8 ON ENABLE AT COMMAND SET

9 ON NO DISCONNECT WITH +++

10 OFF LOAD NVRAM DEFAULTS

Contact your Extreme Technical Support representative and record the dial-in number for the analog line.

Contacting the ExtremeWorks Technical Assistance Center (TAC)

For additional assistance, please contact your local ExtremeWorks TAC.

Americas TAC (Corporate TAC)

Web site: www.extremenetworks.com/support/techsupport.asp

E-mail: support@extremenetworks.com

Toll free: 1-800-998-2408

Direct phone: 408-579-2826

3585 Monroe Street

Santa Clara, CA 95051

EMEA (Europe, Middle East & Asia) TAC

E-mail: support@extremenetworks.com

Direct phone: +31-30-8005000

Kernkade 2

Lageweide Ind. Park

3542 CH Utrecht

The Netherlands

Japan TAC

E-mail: support-j@extremenetworks.co.jp

Direct phone: +81-3-5842-4020

17F Sumitomo Korakuen Building

1-4-1 Koishikawa

Bunkyo-ku, Tokyo 112-002, Japan

>>>

Summit, ServiceWatch and the color purple are registered trademarks of Extreme Networks, Inc. in certain jurisdictions. Alpine, Alpine 3804, Alpine 3808,

BlackDiamond 6808, BlackDiamond 6816, Extreme Standby Router Protocol, ESRP, Summit1i, Summit5i, Summit7i, Summit24, Summit48, Summit48i,

SummitGbX, SummitRPS, Epicenter, Extreme Velocity, the BlackDiamond logo, the Alpine logo, the Summit logo, the ExtremeWorks logo and the Extreme

Networks logo are trademarks of Extreme Networks, Inc., which may be registered or pending registration in certain jurisdictions. Extreme Turbodrive, the

Extreme Turbodrive logo, ExtremeWorks, ExtremeWorks Professional Services and Go Purple are service marks of Extreme Networks, Inc., which may be

registered or pending registration in certain jurisdictions. All other registered trademarks, trademarks and service marks are property of their respective

owners. Specifications are subject to change without notice. L-UG-MSC-111 Rev. November 2001

www.extremenetworks.com

3585 Monroe Street Santa Clara, CA 95051-1450 Phone 408.579.2800 Fax 408.579.3000

Email [email protected] Web www.extremenetworks.com

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