From TOA Electronics, Inc., the VS-900 security intercom system integrates with access control and video surveillance equipment. With the industry-standard RS-232 interface, the compact and rugged VS-900 allows users the ability to program and monitor software and maintain multiple exchanges offsite from one PC. The VS-900 allows users the ability to create a security system specific to their application with support for single-line telephone equipment with caller ID. It also lets users forward calls manually or automatically throughout the system to outside telephones, cellular telephones and pagers. TOA Electronics