Single Source for Voice and Data. We are a regional voice/data integrator providing design/installation/support services through a single source. We have 20 years experience in the infrastructure business and are certified on key platforms. Coghlin Network Services has over 20 years of infrastructure experience working with companies in the New England marketplace. We have developed the following critical business practices: • Voice Data Wiring • Building Security • Audio/Visual • Local Area Network • Network Engineering • Telephony