Black Box MD885A-R3, MD885AE-R2, MD885C-R2, 34336 user manual Dial Backup

Page 58

4.0 General Operation and Special Features

4.3.1AUTODIAL BACKUP

The Modem automatically dials the stored number to connect over the backup line if it detects poor signal quality (ER) or a loss of carrier detect (CD) on the leased line. The criteria used by the Modem in assessing the condition of the leased line depend upon the settings of the Signal Quality option (one error in 103 or 105 bits) and the Carrier Detect Level option (-43,

-33 or -26 dBm).

When Dial Backup occurs (either automatically or by operator intervention), the following message flashes on the front-panel LCD of both modems:

ATTENTION:

DIAL BACKUP

1

2

3

The message clears when the modem returns to the leased line. If you want to clear the message while the Modem is still in dial-backup mode, press the ENT pushbutton.

4.3.2EXIT FROM LEASED LINE AUTO-RECOVERY

If the Leased Line Auto-Recovery Return option is enabled (see below), the Modem automatically exits the Auto-Recovery mode when leased-line conditions are satisfactory. Any normal disconnects (such as loss of carrier or line current) may also disconnect the dial connections and return communication to the leased line. To ensure the proper disconnect capabilities for Leased Line Auto-Recovery mode, both the line current disconnect (CURRENT DISC’T screen) and carrier disconnect (CARRIER DISC’T) options must be enabled on both modems. To manually exit the Leased Line Auto-Recovery mode and return to leased line operation, select DIAL from MAIN MENU screen 1, and then select HANGUP from the AUTO-DIAL screen.

4.3.3LEASED LINE AUTO-RECOVERY OPTIONS

Three options allow you to specify the criteria the Modem uses in determining when to enter and exit the Leased Line Auto-Recovery mode:

•Leased Line Auto-Recovery Select (Select)

•Return From Leased Line Auto-Recovery (retn)

•Test Interval (Test)

The Leased Line Auto-Recovery Select option determines the type of Leased Line Auto-Recovery desired. “DIAL IF BAD >> (1, 2, 3 or 4) min” means dial backup occurs if bad line conditions are present for the number of minutes selected. To disable Leased Line Auto Recovery, select NO AUTO RECOVERY. A sixth option, Manual Recovery, is discussed below.

57

Page 57 Page 59
Image 58
Page 57 Page 59
Contents Modem FCC Information Table of Contents Table of Contents Diagnostics Table of Conents Specifications Specifications Installation Quick StartQuick Start For all applicationsFor dialup applications For leased-line applicationsFront-Panel LCD and Controls Front-Panel LCD and ControlsRS = TR =MR = CS =Quick Setup V25 Dial Async Available Quick Setup ConfigurationsDial Hayes V25 Dial SyncQuick Setup 07 2-W Leased ANS Quick Setup 11 2-W Dial Quick Setup 12 2-W Dial V32/208AT D 5551212 cr Basic OperationAT D 9,5551212 cr AT DP CRN Asynchronous V.25 bis OperationSynchronous V.25 bis Operation Pushbutton 1 Phone Pushbutton 2 Prog Auto-Dial Failure Messages ENT9600 6 2-WIREDIAL Bell 208 Operation Quick Setups 11 34/V.32 Dial Backup Slave-to-Master Inbound Transmission Problem Solving This page is intentionally left blank Modem Setup Options Methods For Selecting OptionsSelecting Options from the Front-Panel Setup Type Line Speed For Modem SETUPS. The first Options Modem SETTING, bps Resultant Data RATE, bpsModem 1 V.42 Error Correction Options Modem Modem Setup Options Modem Modem Setup Options Dialer Mode Data Format Options Modem See Section Remote Test Enable Disable Modem Setup Options Modem Setups Compromise Equalizers option is available for all modes Modem 8 V.33 and Bell 208A/B Options Options Accessible with Summary Setup only Modem Setup Options Modem Modem Setup Options Quick Reset Phone Number StorageLeased Line Auto-Recovery General Operation and Special FeaturesDialing Control Characters Character FunctionDial Backup Dial Line Auto-Recovery DTR Dialing AT &Z0=T555-4545/RDumb Mode And Bell 208 Operation TR MR RS CS Modem Security Operation Password Commands Command Function EXAMPLE1 MEM.LOC.2AT &Z1=/ASECURITY AT &Z5=/PYELLOW Modem-Controlled Remote Control AT &Z0=/UCONNECTEDControl Procedure Modem-to-Modem Control Procedure Using a Rack Controller General Operation and Special Features Remote control-address control mode Diagnostic Interface Control Pin FunctionDiagnostic Port Commands Command FunctionConnect 3,22 Connect 003,022 CON 000003,22Response Meaning Error Address g,uDTE display Automatic Fallback V.22 bis/BELL 212A/BELL 103 Fallback Default Mode DescriptionRate Renegotiation Procedure RRP V.22 bis/V.22/V.21/V.23 FallbackHow to Enable or Disable RRP Rate Change Screen11 V.13 Operation Hayes Emulation Mode Hayes Mode AutodialerAT M2 V1 D 555-1212 S2=1O AT DT 9,212555-1234 or AT DT 9, 212 555Exclamation Flash AT DT 9,555-1212Hayes Compatible Commands AT D3331234 AT D 555-1212 L5 AT S7=30 AT D9,3331234 Hayes Emulation Mode Registers AT S0? S7? AT S0=5Modem Hayes Emulation Mode Selecting Options In Hayes Mode Hayes Mode Reference Tables Hayes Compatible Commands Speaker Control Speaker VolumeProduct Code Or Checksum Forced On-LineTone Dialing Modify S RegisterRead S Register Word/Digit Result CodeLong-Space Disconnect Forced Command StateRecall Factory Configuration Recall Stored User ProfileRTS And CTS Options Asynchronous/Synchronous ModeData Set Ready Control Default User Profile Test CommandsView Active Configuration, etc Write Profile To Memory\B1 Store Telephone NumberBuffer Mode/Speed Conversion MNP Class LimitHayes Compatible Commands Hayes Mode Result Codes Digit Code Word Code Meaning105 Register Range Units Default Description S Register FunctionsV.25 bis Autodialer Enabling The V.25 bis AutodialerV.25 bis Autodialer Commands 109 V.25 bis Autodialer Commands CICC, D, #, V.25 bis Dialing ParametersSection V.25 bis Result Codes DTR Dialing In V.25 bis ModeDialing Parameters V.25 bis Result CodesWhen And Why To Test Symptoms and Scope of The ProblemOverview Of Modem Diagnostics Physical InspectionHow to Select and Activate Tests Diagnostic Monitoring Status Screens116 117 Local Modem Diagnostics Analog Loopback Test119 Analog Loopback Self-Test Albst External Analog Loopback Test Albx 122 External Analog Loopback Self Test Albst 124 Digital Loopback Test DLB Remote Modem Diagnostics Remote Digital Loopback Test RDL127 Remote Digital Loopback Self Test Source Nation Indicator Pin Desig FunctionAppendix B Quick Setup Configurations Table B-1. Quick Setup ConfigurationsTable B-1 . Quick Setup Configurations Dumb LEASED2132 133 134 Appendix C Summary Setup Introduction to Summary SetupFigure C-1. How to access the Summary-Setup Screens Setups Screen Primary OptionsDial Line Options Primary Options0 2 1 1 0 0 V42 1 V42 0 0 0 1 0 2Data Pump Options Pump1 Pump2Miscellaneous Options Misc1 Misc2AT Profiles Screen AT ProfilesREG Screen Figure C-3. Changing the S Register ValueAppendix D Jumpers Appendix D Jumpers Table D-1. Jumper Switch Functions NOM Statement 148 Copyright 1999. Black Box Corporation. All rights reserved
Related manuals
Manual 3 pages 611 b

MD885C-R2, MD885A-R3, MD885AE-R2, 34336 specifications

Black Box 34336 is a versatile and powerful solution designed to meet the diverse needs of data communication and management in various environments. This device integrates advanced technologies that enhance connectivity, streaming capacity, and security, making it ideal for both corporate and personal use.

One of the primary features of the Black Box 34336 is its robust connectivity options. It supports multiple protocols, allowing seamless integration with different network systems, including Ethernet, Wi-Fi, and other wired options. This versatility ensures that users can rely on the device in various settings, from small offices to larger enterprise environments. With the ability to manage both wired and wireless connections, it provides the flexibility needed to create a comprehensive network infrastructure.

Another significant characteristic of the Black Box 34336 is its cutting-edge data encryption capabilities. Security is paramount in today's digital landscape, and this device employs advanced encryption techniques that protect sensitive information during transmission. Whether facilitating remote work or supporting in-house operations, the device ensures that data remains secure, reducing the risk of unauthorized access and breaches.

The device also features an intuitive user interface, making it easy to configure and manage settings. Users can quickly access different functionalities, including monitoring network performance, adjusting security protocols, and managing connected devices. The user-friendly design caters to both seasoned IT professionals and those less tech-savvy, promoting broader usability across organizational levels.

Performance is another critical area where the Black Box 34336 excels. It boasts high-speed data transfer rates, enabling efficient data handling for various applications. Whether it is video streaming, large file transfers, or real-time data analytics, users can expect minimal latency and reliable performance. This capability is particularly beneficial for businesses that require real-time data processing and communication.

In summary, the Black Box 34336 stands out as a reliable and feature-rich solution for anyone looking to enhance their networking capabilities. With its versatile connectivity options, robust security features, user-friendly interface, and high-performance data handling, it addresses a myriad of needs in the modern digital age. As technology continues to evolve, the Black Box 34336 proves to be a forward-thinking solution designed to adapt and thrive in an ever-changing landscape. Whether for personal use or within an organizational framework, this device offers a comprehensive approach to data communication and management.
Top Page Image Contents