Check the listing for details. Vertical Vodavi 4024-00 SBX 24-Button Digital Display Phone Tested & Refurbished. Condition: Seller refurbished. Listed at 50.00 USD. We have been in business since 2006 selling refurbished telecom equipment. Phones are tested by certified phone technicians then cleaned. New cords are included. The Vertical SBX IP 320 converged IP telephony system is the clear choice for today’s dynamic and growing single- and multi-location businesses. Developed in partnership with global electronics and telecommunications manufacturer LG-Nortel, the Vertical SBX IP 320 addresses your current and future communications needs by combining advanced telephony features, communications applications, unmatched ease-of-use, high reliability, and traditional as well as IP telephony at an extraordinary price point. No other communications system can offer the same value to a growing business.