ctsphones.com
California Telephone Systems, Inc.More than 1 million businesses have turned to the Avaya PARTNER Advanced Communications System. The PARTNER System delivers what growing business really need: great call coverage, flexible messaging options, a great selection of stylish and functional phones, and the ability to connect a wide range of accessories. With PARTNER ACS, it’s not only about communications; it’s about helping your business grow.
http://www.ctsphones.com/