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• CallTower, with main offices in South Jordan and Boston, has named Jason Ulm as vice president of product and customer success. Ulm has more than 20 years of telecommunications experience and more than 10 years in executive leadership. Most recently, he was vice president of sales at Appia Communications, which was acquired by CallTower earlier this year. CallTower, founded in 2002, provides cloud-based, enterprise-class unified communications solutions for organizations.