Estech Systems, Inc
- Designer and manufacturer of digital, IP, and converged business phone systems.
- http://www.esi-estech.com/

Nipson Telecom
- Manufacturers of the Nipson brand telephone equipment.
- http://www.nipson.com.hk/

Siemens Communications
- Manufacturer of complete VoIP and traditional, wired and wireless communications solutions.
- http://communications.usa.siemens.com

Vertical
- Provides integrated communications solutions for a variety of businesses and vertical markets.
- http://www.vertical.com/

Telco Inc.
- Contract manufacturer specializing in Electro-Mechanical assembly, PCB assembly, Wire harness and Cable assembly and Nortel telephone repair and refurbishment.
- http://www.telco1.com/

Vodavi Technology, Inc.
- Designs, develops, markets and supports broad range of telephone systems, commercial grade telephones, voice processing products and computer-telephony products. (Nasdaq: VTEK)
- http://www.vodavi.com/

Uniphone Telecommunication Co., Ltd.
- Manufacturer of key telephone system, DISA voice automatic operators.
- http://www.uniphone.com.tw/

Telrad Connegy
- Supporting customers and their investment in communication systems and equipment.
- http://www.telradconnegy.com/

Electronic Tele-Communications Inc.
- Designs, manufactures, programs, markets and leases digital voice and call processing systems and related software. (Nasdaq: ETCIA).
- http://www.etcia.com/

Plant Equipment, Inc.
- Developer of call processing systems for 911 emergency call centers. Career opportunities and industry trade show information.
- http://www.peinc.com/

Lucent Technologies
- Development of existing technologies and creating new innovations.
- http://www.lucent.com/

CTL Inc.
- CTL Is a Telephony Solutions Integrator and Developer. They develop wireless email/inbox extenders, unified messaging, voice mail, auto attendant, fax services, and IVR.
- http://www.ctlinc.com/

Database Systems Corp.
- Provider of the PACER call center phone system which includes predictive dialing, ACD, IVR and call recording. CTI/Web enabled with CRM applications.
- http://www.databasesystemscorp.com/pspredictive.htm

Nitsuko America
- Designs, manufactures and distributes key telephone systems, ISDN-compatible PBXs and Voice Mail/Automated Attendant systems.
- http://www.nitsuko.com/

Toshiba
- Manufacturers of business telephone systems including voice processing digital phones, CTI ACD automatic call distribution to fit your business phone system needs.
- http://www.toshiba.com/taistsd/

Panasonic
- Manufacturer of digital telephone systems.
- http://www.panasonic.com/host/bustele.html

Mitel
- Designer, manufacturer and marketer of systems for the communications industries. Products include wired and wireless applications, voice communications systems and networked voice and data systems.
- http://www.mitel.com/

Inter-Tel
- Full service provider of PBX and key telephone systems, IP telephony gateways and software, Computer Telephone Integration (CTI) applications.
- http://www.inter-tel.com/

Avaya
- Design, build, deploy and manage communication systems and networks, applications and services for enterprises and other organizations.
- http://www.avaya.com/

Archnet
- Archnet is an Asian company (based in China) which manufactures power line carrier (PLC) communication products and systems.
- http://www.archnetco.com/

Intercall Systems Inc.
- Designs and manufactures nurse call systems for the healthcare market.
- http://www.intercallsystems.com/

Cisco
- Manufacturer of complete MAN, WAN, LAN, and WLAN equipment. The site includes an extensive library of product and technology documentation, as well as in-depth network solutions.
- http://www.cisco.com/

BBS Telecom
- Manufacturer of the Plexus and IPS Systems: Smart and affordable phone systems for small to midsize companies.
- http://www.bbstelecom.com/

Hebei Far East Harris Communications Co., Ltd.
- Engaged in the business of the Harris 20-20 switches and enhanced communications products worldwide.
- http://www.fhc54.com/