| 3com | http://www.3com.com | Phones, switches, and power products |
| Aculab | http://www.aculab.com | TDM interface cards |
| Alcatel | http://www.alcatel.com | PBX systems, phones, TDM equipment |
| Altigen | http://www.altigen.com | PBX systems, phones, TDM equipment |
| AP Connections | http://www.netequalizer.com | QoS enforcement devices |
| Audiocodes | http://www.audiocodes.com | VoIP gateway equipment |
| Avaya | http://www.avaya.com | PBX systems, phones, TDM equipment |
| Brix | http://www.brixnet.com | QoS monitoring devices |
| Cisco Systems | http://www.cisco.com | VoIP servers, gateways, and phones |
| Convedia | http://www.convedia.com | Carrier-grade VoIP servers |
| Digium | http://www.digium.com | TDM interface cards |
| DSP Group | http://www.dspg.com | Phones |
| Edgewater Networks | http://www.edgewaternetworks.com | VoIP gateway equipment |
| Elma Electronic | http://www.elma.com | Voice server chassis and TDM interface equipment |
| Epygi | http://www.epygi.com | Voice conferencing server |
| Ericsson | http://www.ericsson.com | VoIP gateway equipment |
| Eutectics | http://www.eutecticsinc.com | USB handsets |
| Hughes Software Systems | http://www.hssworld.com | VoIP, TDM, and SS7 server components |
| i3 | http://www.i3net.it | IVR systems, VoIP system-building components |
| InGate | http://www.ingate.com | VoIP-friendly firewalls |
| Intel | http://www.intel.com | Microchips and TDM interface hardware |
| Inter-tel | http://www.inter-tel.com | PBX systems, phones, TDM equipment, VoIP servers |
| Mediatrix | http://www.mediatrix.com | VoIP gateway equipment |
| Microsoft | http://www.microsoft.com | VoIP hardware drivers for Windows |
| Minacom | http://www.minacom.com | VoIP and TDM service tools |
| Mitel | http://www.mitel.com | PBX systems, phones, TDM equipment |
| Motorola Embedded Communications | http://www.motorola.com/computers | Microchips, interface devices, and embedded software components |
| Multi-Tech Systems | http://www.multitech.com | VoIP gateway equipment |
| NEC | http://www.necunifiedsolutions.com/ip | VoIP-enabled PBX systems and TDM phones |
| Netfabric | http://www.netfabric.com | VoIP gateway equipment |
| Netrake | http://www.netrake.com | VoIP-friendly firewalls |
| Network Instruments | http://www.networkinstruments.com | Troubleshooting and management tools |
| Nortel Networks | http://www.nortel.com | PBX systems, phones, TDM equipment |
| Octasic | http://www.octasic.com | Microchips for audio encoding |
| Pannaway | http://www.pannaway.com | VoIP gateway equipment |
| Pika Technologies | http://www.pikatechnologies.com | TDM interface equipment |
| Power Dsine | http://www.powerdsine.com | Inline power (PoE) devices |
| SEI Power | http://www.seipower.com | Inline power (PoE) devices |
| Shoretel | http://www.shoretel.com | PBX systems, phones, TDM equipment |
| Siemens | http://www.siemens.com | PBX systems, phones, TDM equipment |
| SNOM | http://www.snom.de | IP phones and softPBX servers |
| Teltronics | http://www.teltronics.com | PBX systems |
| Texas Instruments | http://www.ti.com/broadband | Voice-over-broadband interface equipment |
| Toshiba | http://www.telecom.toshiba.com | PBX systems, phones, TDM equipment |
| VegaStream | http://www.vegastream.com | VoIP gateway equipment |
| Verilink | http://www.verilink.com | VoIP gateway equipment |
| VOCAL Inc. | http://www.vocal.com | ATAs |
| VocalData | http://www.vocaldata.com | Carrier-grade VoIP servers |
| VocalTec | http://www.vocaltec.com | Voice-over-broadband interface equipment |
| Zoom | http://www.zoom.com | VoIP gateway equipment, routers |
