For example, as a cost-cutting feature, an installer may program a PBX switchboard to route calls over different lines at different times of the day. However, other workers, such as network technicians or telecommunications specialists , rather than installers generally handle complex programming. Finally, the installer performs tests to verify that the newly installed equipment functions properly. The increasing reliability of telephone switches and switchboards has simplified maintenance. New telephone switches are self-monitoring and alert repairers to malfunctions.
Some switches allow repairers to diagnose and correct problems from remote locations.
When faced with a malfunction, the repairer may refer to manufacturers' manuals that provide maintenance instructions. PBX repairers determine if the problem is located within the PBX system, or if it originates in the telephone lines maintained by the local phone company. To fix the equipment, repairers may use small hand tools, including pliers and screwdrivers to replace defective components, such as circuit boards, fuses, or wiring. They may also install updated software or programs that maintain existing software. Radio mechanics install and maintain radio transmitting and receiving equipment.