A
ACM, Inc.
Actelis Networks
ADTRAN, Inc.
Alcatel-Lucent
Allot Communications
APCO International
ASSIA, Inc.
ATL Communications
AT&T
Audience, Inc.
Aviat Networks
Aware
(Top)

B
Bell Canada
Bexar Metro 911
Bourns Limited
British Telecom
Broadcom Corporation
Brocade Communication Systems
Burndy LLC
(Top)

C
California Cable & Telecommunication Assoc
Capgemini
Cassadian Communications
Charter Communications
Cheetah Technologies
CHR Solutions
Ciena Corporation
Cisco Systems
Clearwire
Commlink, LLC
CommScope
CommSoft
Communications Data Group, Inc.
Concurrent
Cooperative Communications
Corning Inc.
Cortina Systems, Inc.
Counter Link
Cox Communications
Creative Support Solutions
csf Corporation
CSpire Wireless
CSI Telecommunications, Inc.
(Top)

D
Denco Area 9-1-1 District
Department of Commerce
Department of Defense
DSET Corporation
DTS, Inc.
Dynis, LLC
(Top)

E
Earthlink Business
Electronics and Telecommunications Research
EPIC Touch
Ericsson, Inc.
ETI Connect
(Top)

F
Fairpoint Communications
Federal Bureau of Investigation-ESTS
Frequency Electronics
Fujitsu Network Communications
(Top)

G
Gallaudet University
GENBAND
Greater Harris County 911
(Top)

H
Harris Corporation
Hawaiian Telcom
Healy & Company
HP Enterprise Services France SAS
Hickory Tech
Hitachi
Horry Telephone Cooperative
Huawei Technologies (USA)
Hypercube
(Top)

I
Ikanos Communications
INDigital Telecom
Ineoquest
Infinera Corporation
Innovative Systems
Intec Telecom
Intel Corporation
Inteliquent
Interdigital Communications Corporation
Intertek
Intrado
IP Fabrics, Inc.
Ironton Telephone
(Top)

J
JDSU (former Acterna)
John Staurulakis, Inc.
Juniper Networks
(Top)

K
Kineto Wireless
(Top)


L
L. Robert Kimball and Associates
LG Electronics
Lineage Power

(Top)

M
Magnolia Broadband
Marconi Pacific
Metanoia Technologies
MetroPCS
Metropolitan Emergency Services Board
Microsemi
Microsoft Corporation
Moapa Valley Telephone Company
Motorola Mobility
Motorola Solutions
Movius Interactive
(Top)

N
National Communications System
National Information Solution Coop.(NISC)
National Technical Systems (NTS)
NECA
NetTraffic
Neustar
Nielsen Media Research
NII Holdings
Nokia Siemens Networks
NTELOS
(Top)

O
Occam Networks
One2Many
Oscilloquartz
Overture Networks
(Top)

P
Pantech Co. Ltd
PC Test Engineering Laboratory
Pen-Link, Ltd.
Pigeon Telephone Company
Pine Belt Networks
PMC-Sierra, LTD
Polaris Wireless
Public Broadcasting Service
Public Safety and Emergency Preparedness Canada
Public Service Telephone Company
(Top)

Q
QUALCOMM, Incorporated
(Top)

R
Real Communications
Research In Motion
RGB Networks
Rogers Communications
(Top)

S
SAIC Canada
Samsung Telecommunications America
Sandy Beaches Software
Sea Change International
SMS-800 Inc.
Smithville Communicaitons, Inc.
SouthernLINC Wireless
Southwest Research Institute
Sprint Nextel Corporation
Stanford University Networking Research Center
Sumitomo Electric Networks
SureWest Communications
Sycamore Networks
Symmetricom
Synchronoss Technologies, Inc.
Syniverse Technologies, Inc.
(Top)

T
Tarrant County 9-1-1
Technocom Corporation
Tekelec
Tektronix, Inc.
Telchemy
TeleCommunication Systems
Telephone and Data Systems
TeleSphere Software
Tellabs
TELUS
TEOCO Corporation
Texas 9-1-1 Alliance
The Data Center
Thomas & Betts Corporation
Time Warner Cable
T-Mobile USA
Transaction Network Services
TruePosition
(Top)

U
Underwriters Laboratories
Union Telephone Company
(Top)

V
Verint Systems
Verivue, Inc.
Verizon
Vulcan Wireless, LLC
(Top)

W
Washington State Emergency Management
West Carolina Rural Telephone Coop.
Western New Mexico Telephone Company
Wood County Telephone Company
WorldNet Telecommunications, Inc.
(Top)

X
Xtera Communications, Inc.
(Top)

Z
ZTE Incorporated
(Top)

#
800 Response Information Services, LLC
911 Datamaster