installation and maintenance on: Telephone Systems. Including voice over IP Voice Mail. Prewire of telephone and data cable and jacks. CAT 5 Computer Cabling of networks. We can... to celebrating with you at the SBC President's Club event in April of this year. Larry Tumbleson - Regional Vice President Contacting Us Comtel Telephone Systems1127 Kansas Ave...! Our Services All service performed on telephone equipment is done by certified technicians from Comtel Telephone Systems. All work done is guaranteed. Service performed includes...