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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. 12-channel carrier system - Wikipedia

    en.wikipedia.org/wiki/12-channel_carrier_system

    In the U.S. telephone network, the 12-channel carrier system [1] was an early frequency-division multiplexing system standard, used to carry multiple telephone calls on a single twisted pair of wires, mostly for short to medium distances.

  4. 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 ...

  5. Cisco IOS XR - Wikipedia

    en.wikipedia.org/wiki/Cisco_IOS_XR

    Line card running IOS XR. IOS XR is a release train of Cisco Systems' widely deployed Internetwork Operating System (IOS), used on their high-end Network Convergence System (NCS) and carrier-grade routers such as the ASR 9000 series and Carrier Routing System series of routers.

  6. Routing in the PSTN - Wikipedia

    en.wikipedia.org/wiki/Routing_in_the_PSTN

    Routing in the PSTN is the process of forwarding telephone calls between the constituent telephone networks that comprise the public switched telephone network (PSTN). Telephone calls are routed across a network of potentially many switching systems, often owned by different telephone carriers .

  7. Manage distribution lists in AOL Mail

    help.aol.com/articles/manage-distribution-lists...

    Create distribution lists to save time when you send emails to a group of contacts from the contacts you already have in your AOL Contacts, set up a contact list with a group of people you often send emails. For example, you email the same content to 3 friends every week. Instead, create a contact list called "Friends".

  8. Frame Relay - Wikipedia

    en.wikipedia.org/wiki/Frame_Relay

    Frame Relay can run on fractional T-1 or E1, or full T-carrier or E-carrier system carriers. Frame Relay complements and provides a mid-range service between basic rate ISDN , which offers bandwidth at 128 kbit/s, and Asynchronous Transfer Mode (ATM), which operates in somewhat similar fashion to Frame Relay but at speeds from 155.520 Mbit/s to ...

  9. What you need to know about carrier strike groups as U.S ...

    www.aol.com/news/know-carrier-strike-groups-u...

    The United States announced they are sending a second carrier strike group to the Eastern Mediterranean to act as a deterrence amid concerns that foreign aggressors could engage in the war between ...

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