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  2. Carrier Routing System - Wikipedia

    en.wikipedia.org/wiki/Carrier_Routing_System

    Carrier Routing System ( CRS) is a modular and distributed core router developed by Cisco Systems Inc that enables service providers to deliver data, voice, and video services over a scalable IP Next-Generation Network (NGN) infrastructure. In a network topology, these routers are generally positioned in the core or edge of a service provider ...

  3. Carrier-grade NAT - Wikipedia

    en.wikipedia.org/wiki/Carrier-grade_NAT

    Carrier-grade NAT. Carrier-grade NAT (CGN or CGNAT), also known as large-scale NAT (LSN), is a type of network address translation (NAT) used by ISPs in IPv4 network design. With CGNAT, end sites, in particular residential networks, are configured with private network addresses that are translated to public IPv4 addresses by middlebox network address translator devices embedded in the network ...

  4. Toll-free telephone numbers in the North American Numbering ...

    en.wikipedia.org/wiki/Toll-free_telephone...

    The RespOrg is not the carrier. A Canadian carrier could be used for Canadian calls and a U.S. carrier for American calls; a user with many inbound local voice over IP numbers in multiple cities could convert toll-free calls on one main toll-free number to local calls in each city where it has a point of presence. Percentage Allocation routing

  5. Least-cost routing - Wikipedia

    en.wikipedia.org/wiki/Least-cost_routing

    In voice telecommunications, least-cost routing (LCR) is the process of selecting the path of outbound communications traffic based on cost. Within a telecoms carrier, an LCR team might periodically (monthly, weekly or even daily) choose between routes from several or even hundreds of carriers. This function might also be automated by a device ...

  6. Power-line communication - Wikipedia

    en.wikipedia.org/wiki/Power-line_communication

    Power-line communication. Power-line communication (PLC) is the carrying of data on a conductor that is also used simultaneously for AC electric power transmission or electric power distribution to consumers. The line that does so is known as a power-line carrier. In the past, power lines were solely used for transmitting electricity.

  7. Local exchange carrier - Wikipedia

    en.wikipedia.org/wiki/Local_exchange_carrier

    The following information applied to residential local telephone service in the Detroit, Michigan area during the 1970s and 1980s. Much about this subject has changed dramatically since that time, and continues to do so. A local exchange carrier is a carrier of telephone calls and other communication services carried by telephone lines.

  8. Local number portability - Wikipedia

    en.wikipedia.org/wiki/Local_number_portability

    Local number portability (LNP) for fixed lines, and full mobile number portability (FMNP) for mobile phone lines, refers to the ability of a "customer of record" of an existing fixed-line or mobile telephone number assigned by a local exchange carrier (LEC) to reassign the number to another carrier ("service provider portability"), move it to another location ("geographic portability"), or ...

  9. PSTN network topology - Wikipedia

    en.wikipedia.org/wiki/PSTN_network_topology

    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 ...

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