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GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM
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A. GDK-20W Digital Wireless Key Telephone System
The MBU has one(1) wireless terminal interface port that is used to connect one base station.
B. WTIB (Wireless Terminal Interface Board)
The WTIB has two(2) wireless terminal interface(WTI) ports and can support the two(2) base stations.
The WTIB should be plugged into the SLOT5 of the MBU.
C. Base Station (GDC-200B)
The base station should be installed indoors and protected by surge because it is designed for indoor station.
It has a RF(Radio Frequency) Module(transmitter and receiver) that handles communication with wireless terminals
through the air link. It can be connected to a GDK-20W system via Wireless terminal interface ports.
Each base station provides similar coverage for a particular area call as a cell, and supports four(4) simultaneous calls
(four traffic channels). However, since individual wireless terminals are not continuously in call, the system may support
more than four wireless terminals:
In the GDK-20W system, Maximum 20 wireless terminals can be registered.
Base stations may be mounted on walls or desktops up to 300 meters away from the GDK-20W system using twisted one
pair cable (0.5φ, AWG 24). They are remotely powered (DC 30 volts) by the wireless terminal interface circuit.
The number of base stations used in a system depends on the area to be covered and the traffic density. The typical in-
house coverage is a 40 meter radius. In practice the cell size may vary between 10 meter indoors in worst case situation,
up to 200 meters outdoor in free space.
D. Wireless Terminal (GDC-335H, GDC-340H)
It is designed for ease-to-use. The LCD shows various call-information, and the keypad has a 12-dial pad and additional
keys that facilitate wireless terminal.
E. Single Slot Charger (330-SSC, 340-SSC)
The battery of a GDC-335H is charged by a 330-SSC and the battery of a GDC-340H is charged by a 340-
SSC.