Diagnose Land line Phone Problems

How to Diagnose Land line Phone Problems(2)

Steps

2.Now that you have an idea of the nature of the problem, attempt to sectionalize the trouble. There are numerous places where you can logically separate sections of your phone service. Consider each of these places and ask yourself which side the trouble is likely to be on.

3.Consider everything connected to your phone line. Often the trouble is in a device you may not think about, since these devices may be out of sight, out of mind. If you all of your phones are dead, disconnect all of these devices as your first troubleshooting step.

Answering machine

Fax

Computer modem

Satellite receiver or cable box (these devices sometimes have telephone connections for authorization and pay-per-view)

Tips

1.The Network Interface Device (NID), also referred to as the Subscriber/Network Interface (SNI) or the Point of Demarcation (Demarc), is the box, often grey and usually on the outside of the structure, where the telephone company's wires start, the lightning protector is installed, and your phone wiring terminates. (True to telephone company tradition, the terms "NID" and "SNI" are pronounceable acronyms -- they are usually spoken as "nid" and "sny" rather than "n.i.d." or "s.n.i.") An important feature of the NID is a test jack with a short phone cord. Unplugging this cord disconnects all of your internal wiring from the telephone company's network, allowing you to plug a "known-good" phone into the NID to verify that the service is working up to your home or business. If it is, your "service" is fine but your wiring or a device inside are causing the problem. (See line lockout, below.)

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