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GDI Communications LLC

GDI Communications LLC

Phone 775-345-8000
Fax 775-345-8010
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879 Deming Way
Sparks, NV 89431 United States of America
GDI Communications LLC manufactures and supplies high quality communications products for the Transportation and Traffic Control industries.

GDI embraces the entire communication spectrum of technologies and controller plug-in units including:

* Analog Communications over Telco/Private Wire including Digital Telephone Interfaces.

* Wireless Solutions supporting Data, Voice, Video and Networking.

* Fiber Optic Communications supporting Data, Voice, Video and Networking.

* Traffic Controller Plug-in units including Load Switches, Flashers, DC Isolators, AC Isolators.

Product Showcase

Model 400 Stand Alone Traffic Modem

Model 400 Stand Alone Traffic Modem

• 1200 to 19,200 bps
• KOD (Key-on Data)
• Bell 202T Type (400 only)
• RS232 Interface
• Temperature Hardened
• Optional RS422 Interface
• 2 & 4 Wire Switchable
• Anti-Streaming Option
• Rugged Metal Enclosure
• Switch Selectable Timings
• Intergal Power Supply
• Optional DC power

The GDI Series 400 Modems are the most versatile
models for private wire and Telco 3002 interconnect.
There are 17 versions of standalones for different
applications. Begin with the industry standard Model
400SA at 1200 bps and for 2400 bps the Model 404SA.
Then raise the speed to 9600 or 19,200 bps for Models
496SA and 419SA respectively. They are temperature
tested rugged modems designed for the transportation
industry. Directly connected to traffic controllers or
variable message signs, they communicate at 1200 bps
over leased telephone lines or higher speeds via private
wire interconnect. Both point-to-point and multi-drop,
the GDI Series 400 modems offer data rates of 1200 to
19,200 bps. The internal fused power supply on the
standalone model eliminates the common
external transformer.

Adding the KOD function allows signals based on data
received from the hardwire to generate an RTS
handshake. This unique Key-On-Data capability is
essential for communicating with a communications
device that requires active RTS/CTS handshaking..
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