GDC DeskTop V.F. 28.8
High Speed Dial/Private Line Modem
 with Automatic Dial Restore

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  301-924-7400 Support

GDC DeskTop V.F. 28.8 High Speed Dial / Private Line Modem
with Automatic Dial Restore


• Feature-rich, high performance desktop modem ideal for the remote office
• Data speeds up to 33.6 kbps with up to 128 kbps throughput
• Ultra-reliable leased line connections with automatic dial restoral
• Software-based for easy configuration and upgrades
• Multi-level security protects critical applications
• Manage via front panel or remotely via TEAM V.34
• Flash memory


The DeskTop V.F. 28.8 / 33.6 is a member of GDC’s family of high-speed, high performance V.34 modems. Ideal for remote office locations, it is available in a dial-only version for high-speed switched network connectivity or in an ADR (Auto Dial Restoral) version for private line access with automatic dial restoral. The DeskTop V.F. 28.8 / 33.6 transmits synchronously or asynchronously at speeds up to 33.6 Kbps. With advanced compression techniques, it can achieve an effective throughput of up to 64 Kbps in synchronous and 128 Kbps in asynchronous applications.


The DeskTop V.F. 28.8 / 33.6 supports V.34 and slower standard speeds, as well as FAX modes in one compact desktop unit. It is compatible with GDC’s rackmount, high density Spectra-Comm V.F. 28.8 / 33.6 modems, delivering the perfect solution for a wide variety of enterprise applications. Remote DeskTop units can also be paired with SpectraComm 5034 Dual Data Set Emulators (DSEs) in a central T1 groomed access
service environment.

Superior Performance

The DeskTop V.F. 28.8 / 33.6 hardware/software platform includes a powerful Digital Signal Processor (DSP) that ensures maximum efficiency and reliability. A combination of V.42, MNP-4 and Trellis coding for error detection and correction promotes data integrity over the network. And an Autorate Renegotiation capability
dynamically adjusts operating rates to compensate for switched network line impairments. The result is superior performance, even over PSTN circuits, which typically vary in quality. You can use the public network to support high-speed applications —like remote LAN access—that in the past would have required more reliable, but often less economical, dedicated links.

Effortless Upgrades

The DeskTop V.F. 28.8 / 33.6 is completely software definable. Flash memory ensures that upgrades can be done locally, from another location, or downloaded from a central site, as your needs and new developments in modem technology dictate.

Multi-Level Security

The DeskTop V.F. 28.8 / 33.6 provides multiple layers of security, including password protection and fixed and roving call back.  Steadfast Security® protects critical financial, governmental, or company-sensitive applications via a password embedded within the handshake sequence and mandatory callback feature.

Complete Manageability

The DeskTop V.F. 28.8 / 33.6 features the comprehensive yet intuitive management that is a must for unattended remote sites.  Configuration, optioning and dialing can be accomplished via an interactive, user-friendly command panel with a 2-line LCD and a 12-button keypad.  Simplified, menu-driven selections walk the user through a variety of essential communications tasks and network status displays. Support for “AT” and V.25 bis setup and dialing allow flow control, FAX/Data modes and other functions to be customized for each application.  Front panel LED indicators report call status, and a full range of diagnostics can be performed locally or from a remote location. In addition, the DeskTop V.F. 28.8 can be managed using GDC’s
HP OpenView-based TEAM V.34 application software. TEAM® provides central site configuration and testing of remote DeskTop V.F. 28.8 / 33.6s using an intuitive graphical user interface.


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Please contact us 301-924-7400