ince 1996 buzpbx, "The Phone System Experts", has been delivering telecommunication solutions. Worldwide. Telephone System, Phone System, Hosted Phone System, Dallas, Fort Worth based. 888-380-1959 ext 106. Phone System integrator for Phone System, VoIP Phone System, Hosted Telephone System, Business Phone System, Small Business Phone System, IP Phone System, VoIP Telephone System, Telephony, Internet Service Provider, SIP Trunks, Data Cabling. Offices in Arlington, Mansfield, Irving, Denton, Lewisville, Grapevine, South Lake, Coppell, McKinney, Frisco, Allen, Plano, Richardson, Addison, Garland, Mesquite, Rockwall, Grand Prairie, De Soto, Duncanville, Houston, Woodlands, Katy, Sugarland, Clear Lake, Galveston, Austin, San Antonio, Texas.