Question: WRDM-CD is available on channel 20 of a digital cable television service serving how many customers?

Context paragraphs:
List of Music Choice channels: Music Choice (abbreviated as MC) is an American company that programs music and produces music-related content for digital cable television, mobile phone and cable modem users in the United States.  Music Choice programs dozens of audio music channels for digital cable subscribers, as well as programs and produces music-related content for on-demand customers with access to Music Choice On-Demand.  Music Choice also offers video and audio music programming for cell phone customers through Sprint and AT&T.  Music Choice's interactive music video network, SWRV, was started in February 2010 and rebranded in 2013 to Music Choice Play.  This is because the "slideshow" to change pictures for each music channel runs at a very low frame rate, allowing for the compression ratio to be very high for the MPEG-2 digital video compression used in the ATSC standard, until 2012.  The channels on Music Choice does not include interruptions.

KIKU: KIKU, virtual channel 20 (UHF digital channel 19), is an independent television station located in Honolulu, Hawaii, United States.  The station is owned by NRJ TV, LLC.  KIKU's studios are located on Bishop Street in downtown Honolulu, and its transmitter is located in Nānākuli.  KIKU is carried on Oceanic Time Warner Cable on channel 9 and digital channel 89 statewide, Hawaiian Telcom Cable channel 20, and on satellite providers Dish Network and DirecTV, both on channel 20.  As a result, KIKU is available on all the major islands.

Digital cable: Digital cable is any type of cable television distribution using digital video compression for USE.  The technology was originally developed by General Instrument before being acquired by Motorola and subsequently acquired by ARRIS Group.  Cable companies converted to digital systems during the 2000s, around the time that television signals were converted to the digital HDTV format, which was not compatible with earlier analog cable systems.  In addition to providing higher resolution HD video, digital cable systems provide expanded services such as pay-per-view programming, cable internet access and cable telephone services.  Most digital cable signals are encrypted, which reduced the high incidence of cable theft which occurred in analog systems.

Cable converter box: A cable converter box or television converter box is an electronic tuning device that transposes/converts any of the available channels from a cable television service to an analog RF signal on a single channel, usually VHF channel 3 or 4, or to a different output for digital televisions such as HDMI.  The device allows a television set that is not “cable ready” to receive cable channels.  While later televisions were "cable ready" with a standard converter built-in, the existence of premium television (aka pay per view) and the advent of digital cable have continued the need for various forms of these devices for cable television reception.  While not an explicit part of signal conversion, many cable converter boxes include forms of descrambling to manage carrier-controlled access restriction to various channels.

WRDM-CD: WRDM-CD is the Telemundo affiliate for the Hartford/New Haven, Connecticut market.  It broadcasts in digital on channel 19, and is a Class A station.  WRDM's programming is simulcast on WDMR-LD, digital channel 51/virtual channel 50, in Springfield, Massachusetts.  It is available on Comcast channel 13, Cox channel 20, and MetroCast Cablevision on channel 18 but not on any satellite providers.

NHL Centre Ice: NHL Centre Ice is a Canadian digital cable subscription Out-of-Market Sports Package controlled and distributed by Rogers Communications through Rogers Cable as of 2014.  It is offered by three national satellite television service providers, Bell TV, TELUS Optik TV, Telus Satellite TV, and Shaw Direct and many digital cable television providers such as Eastlink, Shaw, Cogeco and more.

Cox Communications: Cox Communications (also known as Cox Cable and formerly Cox Broadcasting Corporation, Dimension Cable Services and Times-Mirror Cable) is an American privately owned subsidiary of Cox Enterprises providing digital cable television, telecommunications and Home Automation services in the United States.  It is the third-largest cable television provider in the United States, serving more than 6.2 million customers, including 2.9 million digital cable subscribers, 3.5 million Internet subscribers, and almost 3.2 million digital telephone subscribers, making it the seventh-largest telephone carrier in the country.  Cox is headquartered at 6205 Peachtree Dunwoody Rd in Sandy Springs, Georgia, U.S., in the Atlanta metropolitan area.

Xfinity 3D: Xfinity 3D was a 3DTV channel owned by Comcast and available exclusively on their Xfinity digital cable television service.  It launched on February 20, 2011.

Music Choice: Music Choice (abbreviated as MC) is an American company that programs music and produces music-related content for digital cable television, mobile phone and cable modem users.  Music Choice programs audio music channels for digital cable subscribers, as well as programs and produces music-related content for on-demand customers with access to Music Choice On-Demand.  Music Choice also offers video and audio music programming for cell phones, available through the Music Choice app.

EPB6: EPB6 is a public access cable channel serving the Glasgow area of Barren County, Kentucky via the cable television service of the Glasgow Electric Plant Board, a provider of cable television, internet service, and electrical power.  It is shown on channel 6 of the basic cable tuner of the Glasgow EPB Cable television system.

Supporting paragraphs: WRDM-CD Cox Communications
Answer: more than 6.2 million