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Western Telematic CMS-16 manual Modem Mode, Port Buffers

Models: CMS-16

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7.3.2. Port Buffers

The Status Screen lists the amount of Buffer Memory currently used by each port. The CMS uses buffer memory in two different ways, depending on the user-selected port mode.

●Any-to-Any, Passive, and Modem Mode Ports: When two ports are communicating at dissimilar baud rates, the buffer memory prevents data overflow at the slower port.

●Buffer Mode Ports: Stores data received from connected devices. The user issues a connect command (/C) from an Any-to-Any Mode or Modem Mode port to retrieve data.

If the Status Screen indicates an accumulation of data, the /E (Erase Buffer) command can be invoked to clear the buffer.

7.4. Modem Mode

In addition to allowing data transfer, the Modem Mode also provides additional functions specifically related to modem communication. A Modem Mode Port can perform all functions normally available in Any-to-Any Mode. The Modem Mode is available to all CMS ports except the Network Port.

When the Modem Mode is selected, the port configuration menu (command /P) will display three additional prompts, which allow the user to re-define the modem reset string, initialization string, and hang-up string.

When the Modem Mode is selected for a port with Supervisor Level command access, the Supervisor Password should be defined. This will discourage unauthorized access to higher command functions.

When a call is received, the unit will prompt the caller to enter a password. The CMS allows three attempts to enter a valid password. If the correct password is not entered in three attempts, or if the user does not respond to the password prompt within 30 seconds, the modem will disconnect.

The password can be defined and enabled by invoking the /P command as described in Section 5.5.

Note:

●When a Modem Mode Port exits Command Mode, or the DCD line is lost while the Command Mode is active, the CMS will pulse the DTR line to the modem. The unit will then send the user-defined modem command strings to make certain the modem is properly disconnected and reinitialized.

●When an external modem is installed at a CMS port, other ports can use the modem for calling out. To call out, invoke the /C command to connect to the port, and then access the modem as you normally would.

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Western Telematic CMS-16 manual Modem Mode, Port Buffers

Contents

Users Guide Console Management SwitchCMS-16 WTI Part No Rev. BBattery Replacement No Serviceable Parts Inside Authorized Service Personnel OnlyNameplate Power Warning Rack Mount Installation3.2. Apply Power to the CMS 3.3. System SetUp Ports Table of ContentsDisconnect Power 3.4. Connecting your PC to the CMS4.2.2. Default Handshake Sw4, Sw5 4.1.2. DC Powered Units 4.2. Configure Option Switches4.2.1. Default Baud Rate Sw1, Sw2, Sw3 4.2.3. Default Response Message Format Sw67.3.1. Reading Data from Buffer Mode Ports 7.3.2. Port Buffers 7.1.1.2. Disconnecting Ports 7.1.2. Defining Hunt Groups7.2. Passive Mode 7.3. Buffer Mode 7.4. Modem Mode 8. Saving and Restoring Configuration ParametersLimited Command Access 6.1. The Port Status Screen Supervisor Mode, Defaults Shown6.2. The Port Diagnostics Screen Defaults Shown Configuration BackupTypographic Conventions 2. Unit Description2.1. Front Panel COURIER FONT2. Power Cable Receptacle 3. Power Switch 2.2. Back Panel3. Getting Started Using Other Parameters for this Overview Optional3.1. Communication Parameters 3.4. Connecting your PC to the CMS 3.2. Apply Power to the CMS3.3. System SetUp Ports 3.5. Communicating with the CMS Unit2. Press Enter to access the CMS Command Mode Figure 3.2 The Port Status Screen Defaults Shown Figure 3.1 The Supervisor Level Help Screen4. Hardware Installation 4.1. Connecting Power to the CMS Unit4.1.1. AC Powered Units 4.2. Configure Option Switches4.1.2. DC Powered Units 4.2.1. Default Baud Rate Sw1, Sw2, Sw3 4.2.2. Default Handshake Sw4, Sw54.2.3. Default Response Message Format Sw6 4.3. Initialize Unit to Default Settings4.2.4. Default Command Echo Sw7 4.4. Connecting Devices to the CMS 4.5. Application ExampleFigure 4.2 CMS Application Example Not to Scale 5. Configuration 5.1. Access to the CMS Command Mode5.2. System SetUp Ports $ telnet 192.1.1.1 Enter5.3. Password Functions 5.3.1. The Supervisor Password5.4. Defining the Site ID and Supervisor Password 5.3.2. The Port Passwords5.5. Port Configuration 5.5.1. Configuration Conventions5.5.3. RS232 Port Configuration Menus 5.5.2. Port ModesTo select port parameters, proceed as follows 5. Stop Bits Default = AT&C1$D2S0=1 Figure 5.2 Port Configuration Menu Modem Mode5.5.4. Network Port Configuration Menu Figure 5.3 Network Parameters Menu Supervisor Mode Only = On 5.5.5. Implementing IP Security Figure 5.4 IP Security MenuMask #1 Action Deny Security Mask #2 Mask #2 Action Permit Example 1 Deny access to all hosts except Security Mask #1Example 2 Allow access only by addresses that begin with Security Mask #1 Mask #1 Action Deny Security Mask #25.6. Copying Parameters to All Ports 5.7. Save User Selected Parameters 6. The Status Screens6.1. The Port Status Screen /S Name The user-defined name for each port 6.2. The Port Diagnostics Screen /SD 6.3. The Network Status Screen /SN 6.4. The Port Parameters Screens /W Figure 6.3 The Network Status Screen Defaults ShownWP xx Enter 7. Operation 7.1. Any-to-Any Mode7.1.1. Port Connection and Disconnection 2. Invoke the /C command to connect the desired ports D 3 Enter D 3 4 EnterD 4 Enter 7.1.2. Defining Hunt Groups Hunt Group Example7.3. Buffer Mode 7.2. Passive ModeHunt Group Example C xx Enter 7.3.1. Reading Data from Buffer Mode PortsE xx Enter 7.4. Modem Mode 7.3.2. Port Buffers8.1. Sending Parameters to a File 8. Saving and Restoring Configuration Parameters8.2. Restoring Saved Parameters 9. Upgrading CMS Firmware 10. Command Reference Guide 10.1. Command Conventions10.2. Command Response Command Syntax 10.3. Command SummaryCommand Availability Terse Verbose1 Supervisor Mode displays parameters for all ports Enter+++Enter Resident Disconnect Sequence 10.4. Command SetEnter Enter Command Mode Format EnterxxxEnterFormat /CP Enter Format /C x x EnterCP Copy RS232 Port Parameters D Third Party DisconnectE Erase Buffer Format /D/Y x x EnterD/Y 2 Enter or /D/Y 3 Enter Format /E/Y x x EnterH Help I Default and TestFormat /F Enter Format /H EnterFormat /N Enter Format /J EnterN Set Network Port Parameters P Set RS232 Port ParametersFormat /SD Enter SD Display Port DiagnosticsT Reset Network Port SN Display Network StatusFormat /UF Enter UF Upgrade FirmwareX Exit Command Mode W Display Port Parameters WhoAppendix A. RS232 Port Interface Appendix B. SpecificationsFormat /X Enter Power Appendix C. Customer ServiceStop Bits 1 or Trademark and Copyright Information Trademarks Used in this Manual