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GHX-308A/616
HYBRID KEY TELEPHONE SYSTEM
Http://suryawardana.com
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SECTION 2. GENERAL DESCRIPTION
2.1 INTRODUCTION
The GHX-308A Hybrid Key Telephone System is designed to meet the telecommunication needs of small size business
using maximum 3 CO lines & 8 extensions.
The system is a flat pack system equipped with basic 3 CO lines and 8 extensions (KTU : 1, Hybrid : 3, SLT : 4).
2.2 SYSTEM DESCRIPTION
The GHX-308A Hybrid Key Telephone System is microprocessor controlled, solid state electoric switching system. All
controls, switching and interface circuitry are condensed onto a single printed circuit board(PCB) located inside the key
service unit(KSU). The system can support both key telephone and single line telephone of DTMF and dial pulse type.
Switching is accomplished through a solid state crosspoint matrix that provides voice path connections for 3 Central
Office lines, 1 Key Telephone, 3 Hybrids (Key telephone or SLT), and 4 SLTs.
There are two(2) external control contact ports that can be flexibly assigned to use loud bell control, external paging
control, door open control and music on hold control.
The system also provides a battery backup interface circuit and a connector that allows customer provided external
battery to be connected with the system, with this facility the system can execute its normal operation during commercial
power failure.