February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index

Today¿s 911 system is built on an infrastructure of analog technol. that does not support many of the features that should be part of an emerg. response. Efforts to splice newer, digital technol. onto this infrastructure have created points of failure where a call can be dropped or misdirected, sometimes with tragic consequences. This report discusses how modernizing the system to provide service that approaches the expectations of its users will require investments in new technol. that should incorp. Internet Protocol (IP) standards. An IP-enabled emerg. commun. network that supports 911 will facilitate interoperability and system resilience; improve connections between 911 call centers; provide more robust capacity; and offer flexibility in receiving calls.