FRAMINGHAM (09/19/2003) - Companies can tighten their security by linking their computer networks with their building-monitoring systems as part of a new service IBM Corp. and General Electric Co. announced this week. The service, available this fall, will ensure IBM's enterprise management software can accept security alerts and other data from GE subsidiary Interlogix's Facility Commander security system. That system collects and manages incoming alerts from multi-vendor badge readers, burglar alarms and surveillance systems. Management of physical security systems - such as badge-based door entry systems, air conditioning monitors and alarm systems - often has been kept separate within corporations from security management of IT-based assets. But that has started to change for many organizations, including the U.S. Department of Defense, which is looking to use a common access smart card for building and network entry.