A number of problems not covered by other articles here may occur if the telephone you're using is faulty. These include improper dialing, voice distortion, cutting in and out, and the like.

A good first step for diagnosing the root of any of these problems is to try another telephone and/or telephone cord in the phone receptacle to see if it works. If the replacement telephone works, the problem is with the telephone, its wire, or the connection at the phone receptacle.

In most cases, the cheapest and fastest solution is to buy a new phone or (telephone wire).