Western Telematic SRM-100 User Manual

WTI Part No.: 13051

Rev. D

SRM-100

Secure Rack Modem

Firmware Version 1.13 and Higher

User's Guide

5 Sterling · Irvine · California 92618-2517

[phone] · Toll Free: 1-800-854-7226

Fax: [phone] · http://www.wti.com

Table of Contents

1. In tro duc tion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

2. Unit De scrip tion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.1. Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.2. Back Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

3. Get ting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.1. Ap ply ing Power to the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.2. Con nect ing a PC to the Con sole Port . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.3. Com mu ni cat ing with the SRM- 100 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

4. Hard ware In stal la tion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4.1. Rack Mount ing In stal la tion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4.2. Con nect ing Power to the SRM- 100 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4.2.1. AC Pow ered Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4.2.2. DC Pow ered Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

4.3. SetUp Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

4.3.1. De fault Mo dem Baud Rate (Sw1, Sw2) . . . . . . . . . . . . . . . . . . . . . 4-2

4.3.2. De fault Flow Con trol For mat (Sw3) . . . . . . . . . . . . . . . . . . . . . . . 4-3

4.3.3. De fault Bits and Par ity (Sw4) . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

4.3.4. De fault Rings to An swer (Sw5) . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

4.3.5. De fault ARQ/Com pres sion Status (Sw6) . . . . . . . . . . . . . . . . . . . . 4-4

4.3.6. De fault Mo dem Speaker Status (Sw7). . . . . . . . . . . . . . . . . . . . . . 4-4

4.3.7. De fault Se cu rity Mode Status (Sw8) . . . . . . . . . . . . . . . . . . . . . . 4-4

4.4. Ini tial ize Unit to De fault Set tings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

4.5. Ca ble Con nec tion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

4.5.1. Mo dem Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

4.5.2. Con sole Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

4.5.3. Telco Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

5. Set- Up and Con figu ra tion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5.1. Com mand Mode Ac cess . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5.1.1. Ac cess Via the Con sole Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5.1.2. Ac cess via Mo dem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

5.2. The Gen eral Pa rame ters Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

5.3. The Mo dem Pa rame ters Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

5.4. Save Pa rame ters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

6. The Pass word Di rec tory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6.1. Add Name / Pass word . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

6.2. Edit / De lete from List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

6.3. Edit / De lete from Search . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

6.4. View ing the Pass word Di rec tory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5

6.5. Zero Ac tiv ity Count ers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

6.6. Save Pa rame ters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

i

SRM-100 - Secure Rack Modem, User's Guide Table of Contents

7. Op era tion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

7.1. SRM Op er at ing Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

7.2. Pass word Func tions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

7.2.1. The Sys tem Pass word . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

7.2.2. The Con sole Port Pass word . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

7.2.3. User Pass words . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

7.2.4. Dial Back Num bers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3

7.2.5. Pass word on Dial Back. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3

7.3. Sup press ing the Con fir ma tion Prompt . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4

7.4. Di al ing Out from the Mo dem Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4

7.5. View ing the Audit Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5

7.6. The Utili ties Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7

7.6.1. Zero All Ac tiv ity Count ers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7

7.6.2. De lete Audit Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7

7.6.3. De lete En tire Pass word Di rec tory . . . . . . . . . . . . . . . . . . . . . . . . 7-7

7.6.4. De fault Pa rame ters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8

7.6.5. Send Test Mes sage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8

7.6.6. Up load Pa rame ters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8

7.6.7. Down load Pa rame ters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9

7.6.8. Pass- Through Mode (Console- Modem) . . . . . . . . . . . . . . . . . . . . . 7-9

8. Sav ing and Re stor ing Pa rame ters and Pass word Di rec tory . . . . . . . . . . . . . . . . 8-1

Ap pen di ces:

A. In ter face De scrip tions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Apx-1

A.1. Con sole Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Apx-1

A.2. Mo dem Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Apx-1

B. Speci fi ca tions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Apx-2

C. Cus tomer Serv ice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Apx-3

List of Figures

2.1. Front Panel (Not to Scale) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.2. Back Panel (DC Version Shown) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

3.1. The SRM-100 Help Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

4.1. Terminal Block Assembly and Grounding Screw (DC Units Only) . . . . . . . . . . . . . 4-2

5.1. The SRM-100 Help Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

5.2. The General Parameters Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

5.3. The Modem Parameters Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

6.1. The Edit Password Directory Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6.2. The Edit/Delete Name/Password Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

6.3. The Password Directory (Sample Data Shown) . . . . . . . . . . . . . . . . . . . . . . . . 6-5

7.1. The Audit Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5

7.2. The Utilities Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7

A.1. Console Port Interface (DTE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Apx-1

A.2. Modem Port Interface (DCE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Apx-1

ii

1. Introduction

The SRM-100 Secure Rack Modem is designed for applications that require secure, dial-up
access to console ports on rack mounted equipment. WTI's Secure Rack Modem can recognize
up to 100 passwords, track activity for each password and create a log record of successful
and/or unsuccessful access attempts.

Password Protected Access

Up to 100 User Passwords can be stored in the SRM's non-volatile memory. Each User
Password can be assigned a user name for easy reference, and an optional Dial Back number
which instructs the unit to call the user at a predefined number before allowing access. A
separate System Password restricts access to the SRM command mode, this allows the system
administrator to contact the unit via modem in order to change parameters or check access
activity. Access to the SRM Command Mode via the Console Port can also be password
protected.

Access Activity Logs

The SRM-100 provides two convenient ways to track access activity; the Audit Log and the
Password Directory. The Audit Log lists the 100 most recent connection attempts, including
the time, date, password entered, port used, call duration, and reason for disconnect. The
Password Directory displays user names, passwords and dial back numbers, and counts use of
each individual password. The Audit Log and Password Directory can only be viewed by the
System Administrator; callers who log on with a User Password are not allowed to view these
screens.

Three Different Operating Modes

The SRM-100 provides three distinct operating modes; the User Mode, the Command Mode,
and the Unsecured Mode.

· User Mode: Provides password protected access to the secure device connected to the

SRM's serial modem port.

· Command Mode: Provides password protected access to the SRM Command Menus,

which are used to define passwords and select configuration parameters.

· Unsecured Mode: When this mode is activated, the SRM will function similar to an

unsecured modem; callers are allowed to access the secure device without entering a
password.

1-1

SRM-100 - Secure Rack Modem, User's Guide Introduction

Features

· Password Protected Command Mode

· Recognizes Up to 100 User-Defined Passwords

· Tracks Access Attempts and Password Activity

· Requires Only One 19 Inch Rack Unit.

· Filtered, Surge Protected Power Supply.

· AC and -48 Volts DC Powered Versions.

Typographic Conventions

Throughout this manual, typefaces and characters have been used to denote the following:
COURIER FONT Indicates characters typed on the keyboard. For example, /H or /G.

[Bold Font] Text set in bold face and enclosed in square brackets, indicates a specific
key. For example, [Enter] or [Esc].

1-2

2. Unit Description

2.1. Front Panel

Figure 2.1: Front Panel (Not to Scale)

ON Indicator: Lights when power is applied to the unit.

À

RDY: Flashes to indicate that the unit is ready to receive calls or enter the Command

Á

Mode.
PASS: Lights when a caller has entered a valid password and has been allowed to access

Â

the connected device.
DCD: Lights when DCD is high at the Modem Port.

Ã

RXD: Lights when RXD is high at the serial Modem Port.

Ä

TXD: Lights when TXD is high at the serial Modem Port.

Å

RTS: Lights when RTS is high at the serial Modem Port.

Æ

CTS: Lights when CTS is high at the serial Modem Port.

Ç

DTR: Lights when DTR is high at the serial Modem Port.

È

Notes:

• Normally, the DTR signal must be high in order for the modem to communicate
with the secure device. If the DTR signal is low, the SRM-100 will prompt callers
to enter a password, but will disconnect when a valid User Password is entered.

• When the Ignore DTR option (See Section 5.3) is enabled, the SRM-100 will
ignore the DTR signal at the serial Modem Port. This allows the serial Modem
Port to be connected to a device that does supply a DTR line.

2-1

SRM-100 - Secure Rack Modem, User's Guide Table of Contents

Figure 2.2: Back Panel (DC Version Shown)

2.2. Back Panel

Power Input: (DC Unit Shown) The DC version includes a dual-bus terminal block for

À

-48 VDC operation and a ground screw. The AC version includes an IEC-32 inlet for

connection to a three wire (grounded) power cord (supplied with unit).
Power Switch

Á

Voltage Selector Switch: (AC Units Only) For selecting 115 VAC or 230 VAC

Â

operation .
Default Button: Resets unit to default parameters and erases the Password Directory as

Ã

described in Section 4.4.
Note: The default procedure will clear all menu-selected parameters, and erase the

Password Directory.
SetUp Switches: Eight DIP switches, which select the default Modem Baud Rate,

Ä

Flow Control, Parity, Rings to Answer, Compression, Speaker (On/Off) and Security
Mode. For more information on the SetUp Switches, refer to Section 4.3.

Console Port: For connection to your PC, terminal, or other device. Allows access to

Å

Command Mode. DB9, RS232, DTE configuration. Note that the command mode can
also be accessed via modem as explained in Section 5.1.2.. Appendix A.1 describes the
Console Port interface.

Modem Port: For connection to the secure device. The SRM-100 will protect dial-up

Æ

access to this device by requiring a password and/or calling the user back at a predefined
number. Appendix A.2 describes the Modem Port interface.

Telco Line: For connection to your telecommunications (telephone) line. The RJ11 Jack

Ç

labeled "Wall" or "Line" is used for connection to your telco line. The Jack labeled
"Phone" is not used.

2

3. Getting Started

This section provides a brief introduction to the procedures that are used to communicate with
the SRM unit and access the configuration menus. For more detailed instructions regarding
installation and configuration, please refer to Sections 4 through 6.

3.1. Applying Power to the Unit

Connect an appropriate power source to the SRM unit. Note that the SRM is available in both
AC and DC powered versions.

· AC Units: Set the Voltage Selector Switch (located on the SRM back panel) to the

appropriate voltage. Connect the supplied power cable to the receptacle on the SRM back
panel, then connect the plug to a suitable AC outlet.

· DC Units: Remove the protective cover from the DC terminal block, switch off the DC

power source, and attach the wires from the -48 VDC power source to the screw terminals.
Connect your ground line to the grounding screw, then replace the protective cover and
switch the DC power source back on.

CAUTIONS:

• This device should only be operated with the type of power source indicated
on the instrument nameplate. If you are not sure of the type of power service
available, please contact your local power company.

• Reliable earthing (grounding) of this unit must be maintained. Particular
attention should be given to supply connections when connecting to power
strips, rather than direct connections to the branch circuit.

After connecting the unit to the power source, press the Power Switch to the On position. The
ON indicator should light, and after a brief pause, the RDY indicator should begin to flash.

3.2. Connecting a PC to the Console Port

For this overview, a PC will be connected to the SRM Console Port. This will allow you to
access the Command Mode and display the menus which are used to select configuration
parameters, check connection activity, and define and display user passwords.

Note: Although this overview demonstrates the procedure for communicating with
the unit via the Console Port, the Command Mode can also be accessed via modem
as described in Section 5.1.2.

To connect your PC to the SRM Console Port, proceed as follows:

1. Attach a standard null modem cable to a COM Port on your PC. Make certain to connect
to the COM port that is used by your communications program (e.g. ProComm).

2. Connect the other end of the cable to the Console Port, located on the SRM back panel.
For a description of the Console Port interface, please refer to Appendix A.

3-1

SRM-100 - Secure Rack Modem, User's Guide Getting Started

3.3. Communicating with the SRM-100

In order to communicate with the SRM unit for the first time, you must set your
communications program (e.g. ProComm) to match the default Console Port parameters. Note
that after you have accessed command mode, you can then use the General Parameters Menu to
select other Console Port parameters as described in Section 5, and then reset your
communications program accordingly.

Start your communications program (e.g. ProComm), and set it to match the following default
Console Port parameters:

· 9600 bps

· 8 Data Bits, 1 Stop Bit

· No Parity

Note: This overview assumes that first time set-up of the SRM unit will be
performed via a local terminal connected to the SRM Console Port. If necessary,
first time set-up can also be performed via modem; in this case, access the SRM
Command Mode as described in Section 5.1.2.

After setting the communications program to match the default Console Port parameters,
proceed as follows:

1. Press [Enter] to activate the SRM Command Mode.
a) If the Console Port Password has previously been defined, the SRM will display a

password prompt. Key in the Console Port Password, or System Password
(Default = SUPER) and press [Enter].

b) If the Console Port Password has not been defined, you will be granted immediate

access to the SRM command mode.

2. After a brief pause, the unit should display the Help Screen shown in Figure 3.1, followed
by the "SRM>" command prompt.

3. If the Command Prompt and Help Screen are not displayed, check to make certain that the
correct communications parameters have been selected, cable connectors are firmly
seated, and that the cable has been connected to the COM Port that is used by your
communications program.

When the "SRM>" command prompt is displayed, you can invoke the commands listed in the
Help Menu to display the various configuration menus and status screens.

3-2

SRM-100 - Secure Rack Modem, User's Guide Getting Started

Secure Rack Modem Version: 1.13 Site: (undefined)

COMMANDS
/H Display Help Screen /C View Audit Log
/G View/Set General Parameters /U Utilities
/M View/Set Modem Parameters /X Exit/Disconnect
/E Edit Password Directory
/D View Password Directory

Modem Type: MT2834ZPX
Reset String: ATZ
Init String: AT&C1&D2E0Q1V1M1S0=1&E1&E15S13=0
Hang-Up String: (undefined)

MODEM PORT SETTINGS
Baud Rate: 9600 Result Codes: Verbose
Flow Control: RTS/CTS Speaker: On
Local Echo: Off Error Control: On
Rings to Answer: 1 Compression: On
Quiet Mode: On Ignore DTR: Off

Figure 3.1: The SRM-100 Help Screen

For the purpose of this overview, it is only recommended to review the information on each
menu in order to familiarize yourself with the unit; it is not necessary to actually enter
parameters at the configuration menus at this time.

1. View/Set General Parameters: From the command prompt, type /G and press [Enter].
The General Parameters Menu will be displayed. This menu is used to set Console Port
communication parameters, define the System Password, Console Port Password, and
select other general parameters as described in Section 5.2. Press [Esc] to return to the
Main Menu.

2. View/Set Modem Parameters: Type /M and press [Enter] to display the Modem
Parameters menu. This menu is used to select communication parameters for the SRM's
internal modem as described in Section 5.3. Press [Esc] to return to the
Main Menu.

3. Utilities Menu: Type /U and press [Enter] to display the Utilities Menu. This menu is
used to access SRM-100 command features, such as the Pass-Through Mode (see
Section 7.6.8), the Download Parameters Function (see Section 8.1), and others. Press
[Esc] to return to the Main Menu. For more information on the Utilities Menu, please
refer to Section 7.6.

4. Other Menus: At this point, commands such as "View Password Directory" and "View
Audit Log" will not display much information. This is due to the fact that the Password
Directory has not been defined yet, and the Audit Log has not had the opportunity to
record connection activity. If you wish to display these menus, key in the appropriate
command and then press [Enter]. To exit a menu, press [Esc] to return to the
Main Menu.

3-3

SRM-100 - Secure Rack Modem, User's Guide Getting Started

5. Exit/Disconnect: When you have finished exploring the various SRM command menus,
return to the "SRM>" Command Prompt, and then type /X and press [Enter] to exit from
command mode.

This completes the introductory overview of the SRM-100. In order to demonstrate the SRM's
security functions, you must completely install the unit, and define the Password Directory as
explained later in this User's Guide. Please proceed to Sections 4 through 6 for complete
installation and configuration instructions.

3-4

4. Hardware Installation

4.1. Rack Mounting Installation

When installing the SRM-100 is an instrument rack, the following factors must be accounted
for:

1. Enclosed Racks: Enclosed racks must provide adequate ventilation. Make certain that
the rack is not overly crowded, and note that each unit in the rack generates its own heat.
An enclosed rack should have louvered sides and a fan to circulate cooling air. The
maximum temperature for the equipment in this environment is 45°C.

When mounting the unit in an enclosed rack with a ventilation fan at the top of the rack,
note that excessive heat generated by devices at the bottom of the rack can be drawn
upward and into the ventilation slots on units located at the top. Make certain to provide
adequate ventilation for equipment installed at the bottom of the rack.

2. Open Racks: Make certain that the rack frame does not block the ventilation slots on the
instrument cover. If the device is installed on sliders, check the unit when seated all the
way into the rack to make certain that ventilation slots are not blocked.

4.2. Connecting Power to the SRM-100

The SRM-100 is available in both AC and DC powered versions.

CAUTIONS:

• This device should only be operated with the type of power source indicated

on the instrument nameplate. If you are not sure of the type of power service
available, please contact your local power company.

• Reliable earthing (grounding) of this unit must be maintained. Particular

attention should be given to supply connections when connecting to power
strips, rather than direct connections to the branch circuit.

4.2.1. AC Powered Units

Set the Voltage Selector Switch (located on the SRM back panel) to the appropriate voltage.
Plug the supplied power cable into the receptacle on the SRM-100 back panel, and then connect
the power cable to an appropriate, grounded (earthed) AC outlet.

4-1

SRM-100 - Secure Rack Modem, User's Guide Hardware Installation

Figure 4.1: Terminal Block Assembly and Grounding Screw (DC Units Only)

4.2.2. DC Powered Units

When connecting the SRM to a -48 VDC power source, first remove the protective cover from
the DC terminal block. Switch off the DC power source, then attach the wires from the power
source to the screw terminals, and connect your ground line to the labeled ground screw. Next,
replace the protective cover, and switch the DC power source back on. Note that the DC
terminal block features a dual bus configuration to allow connection to a back-up power
supply.

4.3. SetUp Switches

The SetUp Switches select default settings for Modem Port baud rate, flow control, parity,
rings to answer, ARQ/Compression, the modem speaker, and the SRM-100 Security Mode.

Note: Operating values for these parameters can also be selected via the SRM’s
configuration menus. However, if the unit is reset to default parameters, these
settings will return to the default values selected by the SetUp switches.

4.3.1. Default Modem Baud Rate (Sw1, Sw2)

SetUp Switches one and two select the default baud rate for the SRM’s internal modem and the
serial Modem Port. The Modem Baud Rate can also be selected via the Modem Parameters
Menu (/M). If the unit is reinitialized, the baud rate will return to the setting specified by
SetUp Switches one and two.

Note: Automatic baud rate sensing is disabled. This allows the SRM to function
with devices that do not automatically negotiate the baud rate.

Default Modem Baud Rate Sw1 Sw2

9600 bps * Down Down

38.4K bps Down Up

19.2K bps Up Down
2400 bps Up Up

* = Factory Setting

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SRM-100 - Secure Rack Modem, User's Guide Hardware Installation

4.3.2. Default Flow Control Format (Sw3)

SetUp Switch three selects the default flow control (handshaking) format for the serial Modem
Port. The Modem Port flow control format can also be selected via the Modem Parameters
Menu. If the unit is reinitialized, the flow control format will return to the setting specified b y
SetUp Switch three.

Default Flow Control Format Sw3

None * Down
RTS/CTS (Hardware) Up

* = Factory Setting

4.3.3. Default Bits and Parity (Sw4)

SetUp Switch four selects the default bits and parity setting for both the internal modem and
the serial Modem Port. The bits and parity can also be selected via the Modem Parameters
Menu (/M). If the unit is reinitialized, bits and parity will return to the setting specified by
SetUp Switch four.

Default Bits and Parity Sw4

8 Bits, No Parity, 1 Stop Bit * Down
7 Bits, Even Parity, 1 Stop Bit Up

* = Factory Setting

4.3.4. Default Rings to Answer (Sw5)

SetUp Switch five selects the default “Rings to Answer” setting. The Rings to Answer setting
can also be defined via the Modem Parameters menu (/M). If the SRM-100 is reinitialized, the
Rings to Answer feature will return to the setting selected by SetUp Switch five.

Default Rings to Answer Sw5

One * Down
Eight Up

* = Factory Setting

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SRM-100 - Secure Rack Modem, User's Guide Hardware Installation

4.3.5. Default ARQ/Compression Status (Sw6)

SetUp Switch six selects the default enabled/disabled status for the ARQ/Compression feature.
The ARQ mode and compression feature can also be enabled or disabled via the Modem
Parameters menu (/M). If the SRM-100 is reset to default parameters, these features will return
to the default settings selected by SetUp Switch six.

Default ARQ / Compression Status Sw6

Enable * Down
Disable Up

* = Factory Setting

4.3.6. Default Modem Speaker Status (Sw7)

SetUp Switch seven selects the default enabled/disabled status for the modem speaker. The
Modem Parameters menu (/M) can also be used to enable/disable the speaker. If the SRM is
reinitialized, this feature will return to the setting selected by SetUp Switch seven.

Default Modem Speaker Status Sw7

On * Down
Off Up

* = Factory Setting

4.3.7. Default Security Mode Status (Sw8)

SetUp Switch eight selects the default enabled/disabled status for the Security Mode. The
Security Mode can also be disabled via the General Parameters Menu (/G). If the unit is
reinitialized, the Security Mode will return to the default status selected by SetUp Switch
eight.

Note: If Modem Security is disabled (off), all password and security features will
be suppressed, and you will not be able to access the SRM command mode via
modem (although Console Port access to command mode is still allowed). When
the Security Mode is disabled, the SRM will function like a normal non-secure,
modem

Security Mode Sw8

On * Down
Off Up

* = Factory Setting

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