St Louis Telephone Equipment and Supplies 11960 Westline Industrial #331 SOURCE, is a premier provider of turnkey, voice and data solutions. Established in 1971 as a repair and remanufactured telephony equipment supplier, the company is an Avaya Platinum Business Partner with an extensive portfolio of services. Product lines include Avaya, ATandamp;T, Nortel Networks, MCK, NEC, NEAX, Mitel, Panasonic, Toshiba, Plantronics, Siemens, Cisco, 3COM, Spectralink and many more. Phone Systems St Louis MO Telephone Equipment and Supplies Source Midwest www.source.com Avaya platinum business partner source avaya telephones phone systems used phone equipment asset management inventory management installation equipment valuation convergence voip Cisco authorized reseller refurbished phone system refur Avaya platinum business partner source avaya telephones phone systems used phone equipment asset management inventory management installation equipment valuation convergence voip Cisco authorized reseller refurbished phone system refur Business Reviews Source Midwest Testimonials