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Open Directory - Computers: Internet: Protocols: SIP: Service Providers
Business: Telecommunications: Services: VoIP
Cheap Voip Inc
- Provides wholesale SIP A-Z termination and phone number origination in the US and UK.
- Provides free SIP addresses, also offers test numbers so that users can check whether their softphone works properly.
- Provides wholesale US SIP termination and US DID origination.
Enterprise Communications Center
- SIP trunking and business VoIP solutions. Site contains white papers and webinars.
- Offers IP based telecommunication solutions: SIP trunking, internet faxing, IP PBX backup solutions.
- Provides B2B hosted VoIP PBX systems in the US. Site includes service details, VoIP phone data sheets, FAQ, VoIP speed test, and E911 info.
Get on SIP
- Provides free SIP addresses and softphone configuration instructions.
- Delivers high quality VoIP communication services to small and medium sized businesses using SIP Trunking.
- A standards based hosted SIP service. Free trial available.
- Swiss VoIP provider that offers free SIP trunk, international numbers and several functions like CLI display.
- Provides SIP trunking and hosted PBX.
- Provides UK phone number SIP termination for ISPs, ITSPs, call centres, calling card providers, and carriers.
- A combined SIP service and web application that can manage SIP devices and SIP providers.
- UK-based pay as you go hosted PBX provider which supports UK number porting.
- Online service to telephony providers to monitor their network using SIP protocol. Free trial available.
- SIP trunking solution. FAQ and support pages.
- A company specializing in the SIP Trunking field since 2006.
- Various SIP services: application, media, billing server.
- Offers SIP trunk and data services.
WorldCall VoIP Termination site
- Provider for Wholesale VoIP Termination service.
SIP Service Providers
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