Suddenlink Communications has largely completed the launch of its 20 Mbps broadband service in the former NPG Cable systems it bought last year.

The recent additions to the 20 Mbps roster were Payson, Pine and Strawberry, Ariz. Suddenlink, the nation’s seventh-largest cable operator, previously upgraded former NPG data services for most of its Arizona customers to its 1.5 Mbps, 10 Mbps and 15 Mbps tiers since acquiring the NPG systems for $350 million in April of last year.

Suddenlink planned on offering a DOCSIS-based 50 Mbps wideband tier in Arizona late last year, but so far it hasn’t been launched.

Suddenlink customers in Payson, Pine and Strawberry also now have access to VOD and Caller ID on TV services, which Suddenlink has launched in other former NPG systems, as well.

Last month, Suddenlink completed its upgrade to all-digital TV and launched more than 100 TV channels, including HD, in Payson, Pine and Strawberry.

The upgrades were part of a larger program that calls for more than $10 million of capital investments in Arizona and two California communities in 2011 and 2012. The Payson, Pine and Strawberry upgrade project began Jan. 18.

Suddenlink has completed all-digital projects in other former NPG systems, including Sedona and Parker.