Nortel Networks Telephone Systems Every business in the world needs a phone system and a voicemail system. Nortel Telephone systems are the best in the industry and they are well known for there reliable performance. If you are looking for Switches, Voicemail Systems, and/or Cards you can count on us here at Apto Solutions to have it in stock and ready to ship. Our Nortel Switches go through a complete inspection and are tested on site to make sure they work up to standards.