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In middle 20th century telephone jargon, the first telephone on a line was a "Main Station" and subsequent ones "Extensions" or even called as intercom. Such extension phones allow making or receiving calls in different rooms, for example in a home, but any incoming call would ring all extensions and any one extension being in use would cause ...
An off-premises extension (OPX), sometimes also known as off-premises station (OPS), is an extension telephone at a location distant from its servicing exchange.. One type of off-premises extension, connected to a private branch exchange (PBX), is generally used to provide employees with access to a company telephone system while they are out of the office.
A telephone numbering plan is a type of numbering scheme used in telecommunication to assign telephone numbers to subscriber telephones or other telephony endpoints. [1] Telephone numbers are the addresses of participants in a telephone network, reachable by a system of destination code routing.
There is an international format for recording a telephone number containing the country code, settlement code and telephone number, and the national format containing the settlement code and telephone number. To record Ukrainian telephone numbers, telephone codes for settlements do not have an initial zero, long-distance prefix: 0.
The German telephone network uses 5,200 geographical area codes, the length of which varies from two to five digits (not including the trunk code 0), with five-digit area codes being assigned only in the New States (prefix 3). In general, geographic area codes start with digits 2 to 9, whereas other non-geographic area codes (including those ...
Extension mobility is often by people who frequently travel between different company locations. They can use any fixed-line phone in the company as if it is their own telephone by logging in. Extension Mobility is also useful in situations where people don’t have a dedicated desk of their own. In a flex-office where people just enter and ...
Local phone numbers in Russia may be made up of five (x-xx-xx), six (xx-xx-xx), or seven (xxx-xx-xx) digits. Moscow City has three area codes assigned: 495, 498 and 499: when calling from any zone to 499: 8 499 xxx-xx-xx; when calling from any zone to 498: 8 498 xxx-xx-xx; when calling from any zone to 495: 8 495 xxx-xx-xx
Telephone numbers are fixed at eight digits for area code 02, and seven digits for area codes from 03X to 09X, with area codes fixed at one, two, or three digits (a six-digit system was used until the mid-1990s; four to five digits were used in the countryside). Mobile phone numbers are always 10 digits (three digits for the service provider ...