Western Telematic SRM-100 User manual

WTI Part No.: 13051
Rev. B
SRM-100
Secure Rack Modem
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. Introduction .............................................1-1
2. Unit Description ..........................................2-1
2.1. Front Panel ..........................................2-1
2.2. Back Panel ..........................................2-2
3. Getting Started ...........................................3-1
3.1. Applying Power to the Unit .................................3-1
3.2. Connecting a PC to the Console Port ...........................3-1
3.3. Communicating with the SRM-100 ............................3-2
4. Hardware Installation .......................................4-1
4.1. Connecting Power to the SRM-100 ............................4-1
4.1.1. AC Powered Units .................................4-1
4.1.2. DC Powered Units .................................4-1
4.2. SetUp Switches ........................................4-1
4.2.1. Default Modem Baud Rate (Sw1, Sw2) .....................4-2
4.2.2. Default Flow Control Format (Sw3) .......................4-2
4.2.3. Default Bits and Parity (Sw4) ..........................4-2
4.2.4. Default Rings to Answer (Sw5) .........................4-3
4.2.5. Default ARQ/Compression Status (Sw6) ....................4-3
4.2.6. Default Modem Speaker Status (Sw7)......................4-3
4.2.7. Default Security Mode Status (Sw8) ......................4-4
4.3. Initialize Unit to Default Settings .............................4-4
4.4. Cable Connection.......................................4-5
4.4.1. Modem Port .....................................4-5
4.4.2. Console Port .....................................4-5
4.4.3. Telco Line ......................................4-5
5. Set-Up and Configuration ....................................5-1
5.1. Command Mode Access ...................................5-1
5.1.1. Access Via the Console Port............................5-1
5.1.2. Access via Modem .................................5-2
5.2. The General Parameters Menu ...............................5-3
5.3. The Modem Parameters Menu ...............................5-6
5.4. Save Parameters .......................................5-7
6. The Password Directory......................................6-1
6.1. Add Name / Password ....................................6-2
6.2. Edit / Delete from List ....................................6-3
6.3. Edit / Delete from Search ..................................6-4
6.4. Viewing the Password Directory ..............................6-5
6.5. Zero Activity Counters ...................................6-6
6.6. Save Parameters .......................................6-6
i

7. Operation ..............................................7-1
7.1. SRM Operating Modes....................................7-1
7.1.1. User Mode ......................................7-1
7.1.2. Command Mode...................................7-1
7.1.3. Unsecured Mode ..................................7-1
7.2. Password Functions .....................................7-1
7.2.1. The System Password ...............................7-1
7.2.2. User Passwords ...................................7-2
7.2.3. Dial Back Numbers .................................7-2
7.2.4. Password on Dial Back...............................7-3
7.3. Suppressing the Confirmation Prompt ...........................7-3
7.4. Viewing the Audit Log....................................7-4
7.5. The Utilities Menu ......................................7-6
7.5.1. Zero All Activity Counters ............................7-6
7.5.2. Delete Audit Log ..................................7-6
7.5.3. Delete Entire Password Directory ........................7-6
7.5.4. Default Parameters .................................7-7
7.5.5. Send Test Message .................................7-7
7.5.6. Upload Parameters .................................7-7
7.5.7. Download Parameters ...............................7-7
7.5.8. Pass-Through Mode (Console-Modem) .....................7-8
8. Saving and Restoring Parameters and Password Directory ................8-1
8.1. Sending Parameters to a File ................................8-1
8.2. Restoring Saved Parameters.................................8-2
9. Modem Command Set (AT Commands) ............................9-1
9.1. Communicating with the Internal Modem.........................9-1
9.2. Modem Status .........................................9-2
9.3. AT Command Set .......................................9-2
10. S-Registers .............................................10-1
11. Modem Result Codes .......................................11-1
Appendices
A. Interface Descriptions .....................................Apx-1
A.1. Console Port ........................................Apx-1
A.2. Modem Port ........................................Apx-1
B. Specifications ..........................................Apx-2
C. Customer Service ........................................Apx-3
ii
SRM-100 - Secure Rack Modem, User's Guide Table of Contents

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....................................3-2
4.1. Terminal Block Assembly and Grounding Screw (DC Units Only).............4-1
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 ...........................................7-4
7.2. The Utilities Menu ........................................7-6
9.1. The Modem Status Screen (Defaults Shown) .........................9-2
A.1. Console Port Interface (DTE) ................................Apx-1
A.2. Modem Port Interface (DCE) ................................Apx-1
iii
SRM-100 - Secure Rack Modem, User's Guide Table of Contents

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, and track activity for each password and create a log record of successful
and/or unsuccessful access attempts.
Password Protected Access
Up to 100 passwords can be stored in the SRM's non-volatile memory. Each 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 to the secure device. 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 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 like a normal,
unsecured modem; callers are allowed to access the secure device without entering a
password.
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 and Surge Protected Power Supply.
·AC and -48 Volts DC Powered Versions.
1-1

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

2. Unit Description
2.1. Front Panel
ÀON Indicator: Lights when power is applied to the unit.
ÁRDY: Flashes to indicate that the unit is ready to receive calls or enter the Command
Mode.
ÂPASS: Lights when a caller has entered a valid password and has been allowed to access
the connected device.
ÃDCD: (Data Carrier Detect) Lights when the DCD signal is high.
ÄRXD: (Receive Data) Lights when the RXD signal is high.
ÅTXD: (Transmit Data) Lights when the TXD signal is high.
ÆRTS: (Request to Send) Lights when the RTS signal is high.
ÇCTS: (Clear to Send) Lights when the CTS signal is high.
ÈDTR: (Data Terminal Ready) Lights when the DTR signal is high. Note that the DTR
signal must be high in order for the modem to communicate. If the DTR signal is low,
the SRM-100 will prompt callers to enter a password, but will disconnect when a valid
password is entered.
2-1
Figure 2.1: Front Panel (Not to Scale)

2.2. Back Panel
ÀPower Input: (DC Unit Shown) The DC version includes a dual-bus terminal block for
-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).
ÁPower Switch
ÂVoltage Selector Switch: (AC Units Only) For selecting 115 VAC or 230 VAC
operation .
ÃDefault Button: Resets unit to default parameters and erases the Password Directory. To
reset to defaults, power off the unit, then press and hold the Default Button while
pressing the Power Switch to ON. Wait several seconds, then release Default.
Note: The default procedure will clear all menu-selected parameters, and erase the
Password Directory.
ÄSetUp Switches: Eight DIP switches, which select the default Modem Baud Rate,
Flow Control, Parity, Rings to Answer, Compression, Speaker (On/Off) and Security
Mode. For more information on the SetUp Switches, refer to Section 4.2.
ÅConsole Port: For connection to your PC, terminal, or other device. Allows access to
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.
ÆModem Port: For connection to the secure device. The SRM-100 will protect dial-up
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.
ÇTelco Line: An RJ-11 Jack, for connection to your telecommunications (telephone) line.
2-2
SRM-100 - Secure Rack Modem, User's Guide Unit Description
Figure 2.2: Back Panel (DC Version Shown)

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 plastic cover from the DC terminal block, switch off the
DC power source, then 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.
CAUTION: 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.
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

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
After setting the communications program to match the default Console Port parameters, press
[Enter] to activate the SRM Command Mode. After a brief pause, the unit should display the
Help Screen shown in Figure 3.1, followed by the "SRM>" command prompt. Note that when
the unit is accessed via the Console Port, a password prompt will not be displayed.
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.
3-2
SRM-100 - Secure Rack Modem, User's Guide Getting Started
Secure Rack Modem Version: 1.11 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: V2.200-V34_AGF_DP1
Reset String: ATZ
Init String: AT&C1&D2E0Q1V1M1S0=1&Q%C3
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
Figure 3.1: The SRM-100 Help Screen