Cobridge Communications has launched its own digital phone service in four of the systems it purchased from Charter Communications last year.

Cobridge selected XCast Labs to help provision its residential VoIP service, which is called Cobridge Voice. The service launched this week in Benton and Maumelle, Ark., New Roads, La., and Marshall, Texas.

Cobridge said the service could be bundled with both high-speed Internet and cable TV for less than $80 a month, or with Internet alone for less than $50 a month, for a full year – without a contract.

Through June 30, customers receive free installation with any Cobridge Voice bundle, which the company said has a value of almost $150. There is no cost for the equipment, and most current phone systems are compatible. Customers can add additional lines for $9.99 more per month.

Cobridge plans to introduce other services and offerings, including more HD channels, to its markets throughout the remainder of the year.

"Cobridge is committed to bringing our customers more and better choices for in-home entertainment and communications," said company founder and CEO Scott Widham. "We're making significant investments to upgrade the systems we acquired from Charter to provide a strong lineup of cutting-edge services such as Cobridge Voice."

Last year, Cobridge bought 36 systems in seven states from Charter Communications. Cobridge sold two of those systems to Knology earlier this year.