Telephone intercom system practical field demonstrational setup guide 

Telephone intercom system practical field demonstrational setup guide.
It shows a hands on practical setup of a telephone intercom system.
It shows how to step by step install a pbx or telephone intercom system.
Mounting telephone sockets on walls.
How to create new telephone sockets.
How to place telephone systems on walls.
How to hung a pabx switch on a wall.
How to mount telephone handsets on the wall.
How to run telephone intercom system cables.
Wiring a telephone intercom system.
Telephone system connection.
Telephone colour code.
How to wire a telephone keystone jack.
How to punch a telephone socket.
How connect telephone extensions to a pbx switch.
How to test a telephone intercom system.

Наука