• Telephone Jacks Unlimited
  
• Expansion Telecom
  
• Comcenter
  1575 N Michigan Ave
• Cdr Data
  1028 N Lake Ave # 105
• Onfiber Communication Inc
  210 S De Lacey Ave
• Belltronix
  115 W California Blvd
• Avaya Inc
  245 S Los Robles Ave