Scanning or autoscanning refers to the a phone's ability to automatically locate clear channels. Some businesses use Centrex in conjunction with an electronic phone system while others connect Centrex lines directly to single-line phones. In the llater case, phones with hold, flash, and programmable feature keys can be most useful. A collection of telephone-company provided services, including caller ID, call forwarding, call tracing, distinctive ring, etc. With respect to answering machines, signifies that the recording medium is a digital chip rather than tape.
Equipment designed to work with the service can handle calls according to the ring pattern.
A fax with distinctive ring recognition, for example, can be programmed to only answer when the fax number has been dialed. On a headset, the foam or leather pad that covers the ear portion of the headset for comfort. Usually replaceable as needed. Also refers to the equipment for doing so and the output thereby produced. Some newer products have a digital duplex speakerphone that gives a more natural sound than half duplex units.