Oct. 6, 2006ESW'06 NG911 Implementation: Lessons learned Henning Schulzrinne Columbia University

Oct. 6, 2006ESW'06 Locating users adding static DHCP information to commodity DHCP servers (isc) is easy no modifications to server but DHCP servers with programmable or database interfaces still rare –DHCP often used for policy --> custom versions CDP + RELO was easiest approach –no need to modify DHCP –no need to add relay agents (don’t control infrastructure)

Oct. 6, 2006ESW'06 LoST Web services easy to use –can generate code (semi)automatically –performance issues PSAP data hard to get –don’t know data sizes –special conditions (donuts) What kind of hierarchies?

Oct. 6, 2006ESW'06 PSAP Surprise: really a conferencing system –LanguageLine, first responders, … Surprise: no uniform incident description What is desirable behavior –rather than current behavior –transfer, overflow Need to integrate agent management –presence –a specialized call center Special requirements: partial mute –not typically supported on conference servers