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2. 8x8 - Wikipedia

   en.wikipedia.org/wiki/8x8

   1,948 (2024) Website. 8x8.com. Footnotes / references. Financials as of March 31, 2024. [update] [3] 8x8, Inc. is an American provider of Voice over IP products. Its products include cloud-based voice, contact center, video, mobile and unified communications for businesses. Since 2018, 8x8 manages Jitsi.

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

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

   Toll-free telephone numbers in the North American Numbering Plan have the area code prefix 800, 833, 844, 855, 866, 877, and 888. Additionally, area codes 822, 880 through 887, and 889 are reserved for toll-free use in the future. 811 is excluded because it is a special dialing code in the group NXX for various other purposes.

4. Telephone number pooling - Wikipedia

   en.wikipedia.org/wiki/Telephone_number_pooling

   Telephone number pooling, thousands-block number pooling, or just number pooling, is a method of allocating telephony numbering space of the North American Numbering Plan in the United States. The method allocates telephone numbers in blocks of 1,000 consecutive numbers of a given central office code to telephony service providers.

5. List of mobile network operators in the United States

   en.wikipedia.org/wiki/List_of_mobile_network...

   AT&T, T-Mobile, Verizon, Boost Mobile, and UScellular also sell SIM cards through their retail channels, both in-store and online. The top five wireless providers operate nationwide wireless networks which cover most of the population in the United States, while smaller carriers provide native network coverage across selected regions of the ...

6. Packet switching - Wikipedia

   en.wikipedia.org/wiki/Packet_switching

   In telecommunications, packet switching is a method of grouping data into short messages in fixed format, i.e. packets, that are transmitted over a digital network. Packets are made of a header and a payload. Data in the header is used by networking hardware to direct the packet to its destination, where the payload is extracted and used by an ...

7. Cable telephony - Wikipedia

   en.wikipedia.org/wiki/Cable_telephony

   Cable telephony. Cable telephony is a form of digital telephony over cable TV type networks. A telephone interface installed at the customer's premises converting analog signals from the customer's in-home wiring to a digital signal, which is then sent over the cable connection to the company's Cable television headend switching center.