905-456-8400Avanti Telecom Networks Inc.
271 Richvale Drive, North York
416-742-4111Balcom Systems
104-1805 Wilson Avenue, North York
416-760-6700Call Center Products
120 Armour Boulevard, North York
416-785-6921Canada Telecomunications Service
42 Dufflaw Road, North York
416-744-5050Central Telecommunications
8 Stanwood Crescent, North York