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Telecommunications in Sri Lanka commenced in 1858 after the first telegraphic circuit between Colombo and Galle was commenced. The sector continues to grow in the modern times. The sector continues to grow in the modern times.
DOCSIS 3.1 uses channel bandwidths of up to 192 MHz in the downstream. [15] Upstream: DOCSIS 1.0/1.1 specifies channel widths between 200 kHz and 3.2 MHz. DOCSIS 2.0 & 3.0 specify 6.4 MHz, but can use the earlier, narrower channel widths for backward compatibility. DOCSIS 3.1 uses channel bandwidths of up to 96 MHz in the upstream. Modulation:
A given headend may have between 1–12 CMTSs to service the cable modem population served by that headend or HFC hub. One way to think of a CMTS is to imagine a router with Ethernet interfaces (connections) on one side and coaxial cable RF interfaces on the other side. The Ethernet side is known as the Network Side Interface or NSI. [3] [4]
In telecommunications, cable Internet access, shortened to cable Internet, is a form of broadband internet access which uses the same infrastructure as cable television. Like digital subscriber line and fiber to the premises services , cable Internet access provides network edge connectivity ( last mile access) from the Internet service ...
DOCSIS 3.0 [15] (cable modem) 1216/216 Mbit/s: 152/27 MB/s: 2006 G.fast ITU G.9701: 2000 Mbit/s: 250 MB/s: 2019 GPON (fiber optic service) 2488/1244 Mbit/s: 311/155.5 MB/s: 2008 [16] DOCSIS 3.1 [17] (cable modem) 10/2 Gbit/s: 1.25/0.25 GB/s: 2013 10G-PON (fiber optic service) 10/2.5 Gbit/s: 1.25/0.3125 GB/s: 2012 [18] DOCSIS 4.0 (cable modem ...
The WAN PHY operates at a slightly slower data-rate than the local area network (LAN) PHY. The WAN PHY can drive maximum link distances up to 80 km depending on the fiber standard employed. The WAN PHY uses the same 10GBASE-S, 10GBASE-L and 10GBASE-E optical PMDs as the LAN PHYs and is designated as 10GBASE-SW, 10GBASE-LW or 10GBASE-EW.
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Speed Channel: joint venture with Cox Communications and Fox Entertainment Group; Fox acquired Comcast and Cox's stakes in 2001; Time Warner Entertainment (26%, with Time Warner Inc.): Comcast sold its 26% stake to Time Warner Inc. (now Warner Bros. Discovery) in 2003. TV One: 50% joint venture with Radio One, which acquired Comcast's stake in 2015