Description
BLACK BOX MD833C-R7 Analog Sync/Async V.32 Modem – Dial-up or Leased-Line, Rack-mount
The BLACK BOX MD833C-R7 is a universal, multimode multispeed modem which utilizes the latest in Digital Signal Processing technology to provide flexible, high-performance data communications. The BLACK BOX MD833C-R7 is a diagnostic modem that accommodates flexible installation requirements, rapid setup, continuous DTE and telephone line status reporting, as well as comprehensive diagnostics to minimize downtime.
14,400 BPS FULL-DUPLEX
The BLACK BOX MD833C-R7 operates at 14.4K bps full duplex over the standard 2-wire Public Switched Telephone Network (PSTN) and over 2-or 4-wire unconditioned leased lines. Fallback rates of 12.0K 9600, 7200, 4800, 2400, 1200, 1200/75, 600 and 300 are also supported. Additionally, the BLACK BOX MD833C-R7 supports CCITI V.13 for simulated half-duplex operation.
MULTI MODE COMPATIBILITY
The BLACK BOX MD833C-R7 supports multiple modulation standards for installed base compatibility. At 14.4K, 12.0K, 9600, 7200 and 4800 bps the BLACK BOX MD833C-R7 is compliant with CCITI Recommendation V.32bis. At 14.4K and 12.0K the BLACK BOX MD833C-R7 is compliant with the CCITI Recommendation V.33. At 9600 and 4800 bps the ALX V.32/14.4m is compliant with the CCITI Recommendation V.32. At 4800, it is compatible with Bell 208 A/B modems. At 2400 bps, it is compliant with CCITI V.22bis and at 1200 and 300 bps, it is compatible with Bell 212A and Bell 103 modems, respectively.
NETWORK MANAGEMENT
The BLACK BOX MD833C-R7 is compatible with Black Box’s Series 431 and AMS Network Management System. The diagnostic interface to the BLACK BOX MD833A-R7v allows centralized configuration, status monitoring and diagnostic control over a network of BLACK BOX MD833C-R7 Modems in any of its operating modes: dial line, leased-line or a combination of both. BLACK BOX MD833C-R7 reports on the condition of the attached DTE device and telephone line to the AMS Network Manager Controller or other data terminal equipment meeting the flexible requirements of the diagnostic interface. The simple command language utilized by the diagnostic interface allows for flexible user customization to meet network management objectives.
AUTOMATIC DIAL BACKUP
The BLACK BOX MD833C-R7 supports an automatic dial backup feature for leased-line applications. The BLACK BOX MD833C-R7 monitors the received carrier level and ljne quality and in the event performance drops below the selected threshold, will place a single dial call to the remote BLACK BOX MD833C-R7 via the PSTN. Automatic lookback allows communications to be returned to the leased line when conditions permit. Time-controlled dial backup is available as an option in units with an on-board real time clock (RTC).
HAYES® -COMPATIBLE & V.25 BIS AUTODIALERS
Automatic call origination is provided by the BLACK BOX MD833C-R7 via a Hayes compatible or CCITI V.25bis compliant auto-dialer. The Hayes® emulation mode allows the BLACK BOX MD833C-R7 to interface with a computer running intelligent communications software written to drive a Hayes® -style autodial modem. The CCITI V.25bis autodialer is compatible with asynchronous and synchronous serial call origination standards.
MNP® CLASS 5/CCITT V.42bis
The BLACK BOX MD833C-R7 supports MNP® (Microcom Networking Protocol) and CCITI V.42bis provides end-toend error correction and data compression between the BLACK BOX MD833C-R7 and another modem equipped with MNP® or V.42bis in the asynchronous operating mode. Error correction may be enabled in both dial and leased line operation.
SECURITY OPERATION
Security operation is available with the BLACK BOX MD833C-R7 to screen incoming calls. The BLACK BOX MD833C-R7 can be programmed to callback or pass-through the incoming caller after password validation. The BLACK BOX MD833C-R7 can also be programmed for transparent password protection in all operating modes by incorporation of the security password into the handshake process.
SOFT SETUP
The BLACK BOX MD833C-R7 provides soft setup for unit configuration. All Alliance modems incorporate a Liquid Crystal Display (LCD) and six front panel pushbuttons. Ths allows one method of unit configuration from the front panel, alleviating the need for internal switches. The options once selected are stored in nonvolatile memory (EEPROM). Another method of setup is provided through the diagnostic interface. A simple command language is utilized that allows local and remote configuration of the BLACK BOX MD833C-R7 over the diagnostic interface.
V.54 DIAGNOSTICS
Fully featured diagnostics are included for rapid problem isolation and downtime minimization. CCITT V.54 tests plus self-tests can qe initiated from the unit's front panel, DTE interface or diagnostic interface. The BLACK BOX MD833C-R7 supports Analog Loopback (Loop 3), Analog Loopback Self-test, Analog Loopback Self-test with Errors, Remote Digital Loopback (Loop 2), Remote Digital Loopback Self-test. In addition to diagnostic tests, the BLACK BOX MD833C-R7 provides numerous status displays the monitoring of the DTE interface and telephone line conditions. These status displays are available on the unit's front panel as well as remotely through the diagnostic interface.
VERSATILE CONFIGURATIONS
The BLACK BOX MD833C-R7 Modems are available in both stand-alone and rack-mount configurations. The units utilize a common base and are therefore interchangeable. For
RACK APPLICATIONS
117 VAC and -48 VDC applications, the rack provides mass termination connectors or optional single line breakout cards for the telephone line interface. Separate DTE interface connectors are provided as well on the rack's motherboard. Hot insertion is permitted and rapid swapping of rack-mount cards is accommodated, thus minimizing the time and cost of reconfigurations as installation and maintenance requirements dictate.
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