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SIP Trunking, hosted PBX, and carrier offload services to small and medium businesses. Toll-Free SIP trunking and disaster/fail-over solutions available.
Offers SIP trunking, data, and hosted telephony solutions. UK based.
A combined SIP service and web application that can manage SIP devices and SIP providers.
Provides UK phone number SIP termination for ISPs, ITSPs, call centres, calling card providers, and carriers.
SIP only carrier offering wholesale VoIP solutions. SMS messaging platform and developer API integration. Supports G.729 audio codec. Guides available for interconnection.
Wholesale VoIP DID, Origination, Termination and E911 service provider. "Backoffice" platform offers inventory management, CRM and least cast routing via underlying SIP carriers.
White label SaaS platform enables Channel Partners to successfully sell, deliver, manage, and invoice for cloud SIP communications services. Partner programs for MSP, VAR, and ITSPs.
T.38 Fax Over IP (FoIP) service. Offers T.38 SIP trunk origination and termination, as well as service provider fax offload. ECM Self-test, with PBX and device configuration guides available.
A fully automated , white label B2B SIP Trunk provider. Offers store-and-forward HTTPS fax. PBX configuration guides, and SIP trunk education resources available.
Wholesale SIP trunking provider offering low-cost DID origination and termination. Site offers multiple interconnection guides for most popular PBX systems.
SIP trunk provider offering quick SIP trunk configuration and flexible billing platform. Custom module available for easy integration for FreePBX.
B2C oriented Voice over IP (VoIP) provider. Flat rate internet phone service, online account management and VoIP tools available.
UK Based SIP service provider serving businesses and call centers & offering unlimited concurrent call paths. Free US-based virtual phone number with every account.
Provides free SIP addresses and softphone configuration instructions.
Provides wholesale US SIP termination and US DID origination.