| Company | Description | Invested | Status |
A+ Network Inc.
|
Paging, voicemail and cellular telephone services
|
1994
|
Former
|
Acacia Communications, Inc.
|
Subsystems for ultra-high speed fiber optic transmission
|
2013
|
Current
|
Accedian Networks Corporation
|
Wireless and wireline network performance solutions
|
2010
|
Current
|
Active Voice Corporation
|
Call processing systems
|
1990
|
Former
|
Actix Limited
|
Mobile network analytics and optimization
|
2005
|
Current
|
Alopa Networks, Inc.
|
Subscriber service solutions for broadband access networks
|
2000
|
Former
|
AltoCom, Inc.
|
Communications software/IP
|
1998
|
Former
|
Boca Research, Inc.
|
Board products for IBM-compatible PCs
|
1992
|
Former
|
CallTech Communications, Inc.
|
Call center solutions
|
1999
|
Former
|
Casa Systems, Inc.
|
Next generation cable edge technology
|
2010
|
Current
|
CIDCO, Inc.
|
Telephone and caller ID products
|
1993
|
Former
|
Coleman Consulting Group, Inc.
|
Workforce management solutions
|
1998
|
Former
|
Commnet Wireless, LLC
|
Wholesale wireless roaming services
|
2003
|
Former
|
Ditech Networks, Inc.
|
Telecom equipment
|
1997
|
Former
|
Empower RF Systems, Inc.
|
Ultra-broadband radio frequency amplifier modules and systems
|
2006
|
Current
|
E-TEK Dynamics, Inc.
|
Optical components and subsystems
|
1997
|
Former
|
Extended Systems, Inc.
|
Connectivity products for PCs
|
1992
|
Former
|
Fiber Options, Inc.
|
Fiber optic transmission products
|
1992
|
Former
|
Finisar Corporation
|
Optical subsystems and test equipment
|
1998
|
Former
|
Future Domain Corporation
|
Peripheral controller and interface hardware
|
1989
|
Former
|
Globe Wireless, LLC
|
Wireless communications for the maritime industry
|
2000
|
Current
|
Hittite Microwave Corporation
|
High-performance integrated circuits
|
2000
|
Former
|
Jamba! AG
|
European mobile Internet content
|
2003
|
Former
|
M/A-COM Technology Solutions Holdings, Inc.
|
Radio frequency semiconductors and components
|
2010
|
Current
|
Martin Group, Inc.
|
Customer care, billing solutions, and telecommunications consulting
|
1999
|
Former
|
MCK Communications, Inc.
|
Distributed voice solutions for the extended enterprise
|
1996
|
Former
|
MIND CTI, Ltd.
|
Billing and customer care for IP services
|
2000
|
Former
|
NetCom Systems, Inc.
|
Network test equipment
|
1997
|
Former
|
Omtool, Ltd.
|
Client/servier fax automation software
|
1996
|
Former
|
OPNET Technologies, Inc.
|
Management software for networks and applications
|
1997
|
Former
|
Pacer Electronics, Inc.
|
Wire, cable, and related supplies
|
1996
|
Former
|
PeerApp, Ltd.
|
Transparent caching software
|
2011
|
Current
|
Powerwave Technologies, Inc.
|
Wireless infrastructure equipment
|
1995
|
Former
|
Sage Telecom, Inc.
|
Competitive local exchange carrier services
|
2002
|
Former
|
Sirenza Microdevices, Inc.
|
High-performance RF components
|
1999
|
Former
|
Somera Communications, Inc.
|
Telecom equipment and services
|
1998
|
Former
|
TGV Software, Inc.
|
Standards-based Internet working software
|
1993
|
Former
|
Ubiquiti Networks, Inc.
|
Broadband wireless network solutions
|
2010
|
Current
|
WebEx Communications, Inc.
|
Web-based collaborative meeting services
|
1999
|
Former
|
Xylan Corporation
|
High-bandwidth switching systems
|
1993
|
Former
|
Zenoss, Inc.
|
IT infrastructure management software
|
2012
|
Current
|