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2.1 Before Installation
Installation Manual 27
4. Use 2-pair telephone cables when connecting PTs.
Use 1-pair telephone cables when connecting SLTs, data terminals, answering machines, computers,
Voice Processing Systems, etc.
5. Unplug the system from its power source when wiring, and plug the system back in only after all wiring
is completed.
6. Mis-wiring may cause the PBX to operate improperly. Refer to Section 2 "Installation" when wiring the
system.
7. If an extension does not operate properly, disconnect the telephone from the extension line and connect
it again, or turn off the PBX using power switch then turn it on again.
8. For safety purposes this unit is equipped with a grounded plug. If you do not have a grounded outlet,
please have one installed. Do not bypass this safety feature by tampering with the plug.
9. Use twisted pair cable for CO line connection.
10. CO lines should be installed with surge protectors. For details, refer to "2.2.10 Surge Protector
Installation".
11. To assure good quality telephone connection, it is recommended new and modifications to existing
installation of customer premise wiring shall use solid twisted pair copper conductors with minimum 24
gauge that comply with the electrical specifications for Category 3 wiring as detailed in ANSI/EIA/TIA-
570A Building Wiring Standards.