Acme Packet
Airspan
Airspan Netspan
ARICENT
BEA SIP Server
BlueNote Networks
Blueslice
Cantata
Cingular Developer
Cisco SIP Products
Covergence
CONVERGIS
Etherstack
Free WiFi HotSpots
incognito
IntelliNet Tech
Intrado
Ixia

Longboard
Newport Networks
OpenCloud
Pactolus
PingTel
PsipTN
Pulver.com SIP Products
Radsys
Sangoma
SIP Storm
Stratus Technologies
SureTel - WVHTC
TruePosition
Ubiquity
Ubiquity Developer Network
Ulticom
Voice System (OpenSER)