CSi is strategically located in Allentown, PA within hours of the entire Northeast market.
For over four decades, CSi has been a leader in security and communications systems for businesses, educational institutions, healthcare facilities, government and more. CSi also deploys technical personnel nationwide from our corporate location to service accounts. Large or small we can help you secure your most valuable assets.
To request service any time of the day or night, call our 24-hour service line at 610-841-9615.
To remotely access your CSi system, click here and enter your six-digit code. If you need help call 610-439-1600 or use the webform below.
Via U.S. Mail or in person:
Communication Systems, Inc.
4670 Schantz Road, Allentown, PA 18104
Reception Hours: M-F, 9AM to 4PM
24-Hour Service Hotline: 610-841-9615