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Communications and Systems
 Portfolio Companies

 http://www.chelsio.com
Chelsio Communications, Sunnyvale, California
Chelsio provides high-speed protocol-acceleration products to manufacturers of server, storage, and data-communications equipment.
http://www.chelsio.com/

 IDEngines Logo
Identity Engines, Inc. acquired by Nortel
Identity Engines sells network-focused, identity management systems to enterprise customers.
http:www.idengines.com/

 http://www.tnsi.com
InfiniRoute Networks, acquired by Transaction Network Services (NYSE:TNS)
InfiniRoute Networks provides fully managed Voice over IP (VoIP) peering services for wire-line and wireless carriers who need PSTN-quality VoIP connections worldwide.
http://www.tnsi.com/

 http://www.sensysnetworks.com/
Sensys Networks, Berkeley, California
Sensys Networks sells wireless sensor networking devices for Intelligent Traffic Systems, ITS, such as freeway and arterial traffic monitoring, and intersection traffic signal control.
http://www.sensysnetworks.com/

http://www.venturiwireless.com/
Venturi Wireless, Sunnyvale, California
Venturi Wireless enables enterprises and carriers to significantly accelerate content delivery over any wired or wireless wide area network.
http://www.venturiwireless.com/

 Prior Investments by Horizon Managing Directors

 http://www.hearme.com/
AudioTalk Networks (acquired by HearMe) Mountain View, California
AudioTalk was a provider of Internet voice and IP telephony technologies to Web businesses. The company was acquired by HearMe in 2000.
http://www.hearme.com/

 http://www.harmonicinc.com/
Harmonic, Inc. (NASDAQ: HLIT) Sunnyvale, California
Harmonic Inc. is a leading provider of broadband optical networking and digital video systems to cable, satellite, terrestrial, telecom and wireless operators.
http://www.harmonicinc.com/

 http://www.palm.com/ Palm™, Inc. (NASDAQ: PALM), Santa Clara, California
Palm™, Inc. is the leading pioneer in mobile and wireless personal digital assistant, PDA, solutions.
http://www.palm.com/
 http://www.watchguard.com/
RapidStream, Inc. acquired by WatchGuard Technologies (NASDAQ: WGRD) Santa Clara, California
RapidStream, Inc. develops third generation network security appliances that simultaneously deliver high performance VPN, firewall, quality-of-service, network address translation, load balancing and hacker defense.
http://www.watchguard.com/

 http://www.savvis.net/
Sandpiper Networks, Inc. acquired by Cable & Wireless America (NASDAQ: SVVS) Westlake Village, California
Sandpiper Networks, Inc. is a provider of adaptive content distribution services.
http://www.savvis.net/

 http://www.spectralink.com/
SpectraLink Corporation, acquired by Polycom (NASDAQ: PLCM),Boulder, Colorado
SpectraLink Corporation is the market leader in providing wireless telephone systems for the workplace.
http://www.polycom.com/

 

 
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