Search results
Results from the WOW.Com Content Network
A marker is a type of special purpose control system that was used in electromechanical telephone central office switches. Switches employing markers belong to a class of switches known as " common control ", as the purpose of a marker is to control the closure of contacts in the switching fabric that connect a circuit between the calling party ...
PSTN network topology is the switching network topology of a telephone network connected to the public switched telephone network (PSTN).. In the United States and Canada, the Bell System network topology was the switching system hierarchy implemented and operated from c. 1930 to the 1980s for the purpose of integrating the diverse array of local telephone companies and telephone numbering ...
List of the mainly electro mechanical switching systems from Hasler AG Bern, which were used in public telephone network in Switzerland for many decades. Hasler AG finally merged into Ascom in 1987. HS 25 (modified from the Ericsson OL-100 system with double relays and 25-point selector (Ericsson license), mainly used for small villages and ...
Excel Communications, Inc. was a multi-level marketing (MLM) telecommunications company that was, at one point, America's fifth largest long-distance carrier after AT&T, MCI, Sprint, and Worldcom. [ 1 ] [ 2 ]
GETS is accessed through a dialing plan and Personal Identification Number (PIN) card verification system. Using common telephone equipment, the user dials the universal access number 710-627-4387 (710-NCS-GETS). A prompt directs the entry of the user's assigned twelve-digit PIN and the destination telephone number. Once the user is ...
Before the digital T-carrier system, carrier wave systems such as 12-channel carrier systems worked by frequency-division multiplexing; each call was an analog signal. A T1 trunk could transmit 24 telephone calls at a time, because it used a digital carrier signal called Digital Signal 1 (DS-1). [ 3 ]
Telephone number mapping is a system of unifying the international telephone number system of the public switched telephone network with the Internet addressing and identification name spaces. Internationally, telephone numbers are systematically organized by the E.164 standard, while the Internet uses the Domain Name System (DNS) for linking ...
The expansion of the North American Numbering Plan (NANP) is the anticipated requirement for providing more telephone numbers to accommodate future needs beyond the pool of ten-digit telephone numbers. Ten-digit telephone numbers have been in use in the United States and Canada in long-distance telephone service since the 1950s.