Voice Over IP (Marshall Site) Jim Van Dyke - Assistant Section Head of NETS September 1, NETS Meeting Developed by: Scott Colburn, Jeff Custard, Jim Van Dyke, Teresa Shibao

Voice Over IP(VoIP) Overview Allows Voice to travel on the IP network –Uses G.711 & G.729a compression –H.323 v2, MGCP protocols Minimal Hardware Requirements –IP Phone –Network Switch –DHCP, TFTP, LDAP3 –Call Manager –Voice Message Center –Gateways: PSTN and/or Phone switch

VoIP Design Considerations What do we want to test? –What devices? –What features? –What telephones? What do we want at Marshall? –Minimal hardware –Same devices as what we already have What are the limitations of the Wireless –No ISL support –Limited Speed

Design Considerations Cont. What devices do we want at the Mesa? –All hardware needed to run system –Test other hardware How do we address the phones?

Initial Findings Require lots of hardware Not designed for a small site Has difficulties handling 911

The Solution Diagram Diagram

The Solution: Marshall Site New Cabling Hardware: 3640 VoIP Limitations Handling 911 Wireless Limitations

The Solution: Mesa Site Existing/New: DHCP, TFTP, LDAP3 New Devices: –3640 –Call Manager –Voice Message Center Connection to Existing System

Costs Jeff’s Excel Sheet

More Questions What hardware is optimal? How will it impact the network? Will QOS be required?

Other Sites Each Site Needs –Call Manager –Gateway –Voice Message Center All sites would connect together

Items to Consider for the Future Will we need QOS? What features are needed? How simple should move/add/deletes be?

Conclusion Voice over IP has great potential