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⑦416 Exts. Port
2.2.2 TS/TS+ Metal Series
①Power Indicator Light ②C.O.Line Indicator Light ③Exts. Indicator Light
④C.O.Line Port ⑤Exts. Port ⑥Power Socket
⑦Power Switch ⑧External Music Interface
⑨Door Lock Interface(optional)
2.3 Installation procedure
Before installation, please check all the parts if have any looseness, take care the supply
power switch if is shut down.
The telephone exchange shall be installed in a stable indoor place with dry, ventilated
environment. (Temperature Range: 0-45℃, Humidity Range: 20%-80%.Avoid straight sun
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