SIP Trunking services
Skype for Business enables connectivity to the Public Switched Telephone Network (PSTN) directly over SIP to provide flexible unified communication capability with reduced cost. Certified for Skype for Business SIP trunking services help enterprises to connect their on-premises Skype for Business infrastructure to external PSTN network in a highly scalable way. Skype for Business provides the most reliable PSTN interconnectivity with SIP trunk providers.
The following table lists the SIP trunking services that are certified for Skype for Business.
| Carrier | Service Name | Qualified with TLS & SRTP |
|---|---|---|
| Accelerated Connections | ACI SIP Trunk | |
| Allo Communications | Allo SIP Trunk | |
| Altibox | Altibox SIP Trunk | |
| AT&T | AT&T IP Flexible Reach Service | |
| Bandwidth | SIP Voice Services | |
| Brightlink IP | Brightlink IP SfB Enterprise | |
| Broad-Connect | SIP Trunking | |
| BroadSoft Adaption | OfficeTrunk | |
| BROKERTEAM | SIP Trunk Brokerteam - Winvision Voice | |
| BT Global Services(http://www.callplus.co.nz/) | SIP Trunk | |
| C3NTRO | Lync SIP Connect | |
| CCI Network Services | CCI_SFB | |
| Cebod Telecom | Business SIP Trunking / Cloud PBX | |
| Cincinnati Bell Business / CBTS | SIP Trunking | |
| Circuit ID | Cloud SIP | |
| Colt Technology Services | VoIP Access | |
| Columbus Business Solutions | CBS Cloud Voice | ✔ |
| Comscentre | Comscentre Sip Connect for Microsoft Lync | |
| DIDforSale | Business SIP Trunk / Cloud PBX | |
| Elisa | SIP Trunking | ✔ |
| Fujitsu | SIP Trunk | |
| G12 Communications | Lync SIP Trunks | |
| Gamma | SIP Trunking | |
| GlobalConnect | GlobalConnect SIP Trunking | |
| Globalgig | Globalgig SIP Trunking | ✔ |
| IntelePeer | IntelePeer SIP Trunking | ✔ |
| Internet Solutions | Internet Solutions SIP Trunk | |
| Interoute | Interoute One | |
| ipvision a/s | VIP Trunk | ✔ |
| Kordia | Onkor Voice | ✔ |
| Level 3 | Level 3 Communications SIP Trunking | |
| Magna5 | Business SIP Trunk | |
| [Magnetic North | Cloud PBX | |
| Netstream | Lync Connect | ✔ |
| Nuwave Communications, Inc. | NuWave Connect | ✔ |
| Masergy Communications | Intelligent SIP Trunk | |
| OneStream Networks | Skype for Business SIP Trunking | ✔ |
| Orange Business Services | Business Talk (SIP Trunking) | |
| Peerless Network | Enterprise SIP Trunking | |
| Phonero | Phonero SIP-trunk | |
| PrimeTel | PrimeTel SIP Trunk | |
| Pure-IP | OneLync SIP Trunks | ✔ |
| QSC AG | IPfonie extended link | |
| Redwood Technologies | SIP Trunk | |
| Red Sky Technologies | E911 Anywhere | ✔ |
| Rogers Business Solutions | Rogers Business Solutions (RBS) SIP Trunking | |
| SaskTel | SaskTel IP Trunking Services | |
| SBC Europe | SIP Trunking for Microsoft Lync (2013) | |
| SoTel Systems, LLC | SIP Trunking | |
| Sprint | Global SIP Trunking | |
| Swisscom (Switzerland) | VoIP Gate | |
| TalkTalk Business | TalkTalk Business SIP Trunking | ✔ |
| Tata Communications | Global SIP Connect | ✔ |
| TDC Erhverv | Skype for Business Trunk | ✔ |
| Tele2 Sweden | Tele2 Business Trunk | |
| Telappliant | talkAssure SIP Trunking for Microsoft Lync | |
| Telavox | SIP Trunk | ✔ |
| Tele2 | VoIP Connect | |
| Telecom New Zealand / Gen-I | Voice Connect | |
| Telefonica Business Solutions | SIP Trunking | |
| TeliaSonera Finland Oyj | Sonera Business Voice Access | |
| Telio Telecom AS | Telio SipTrunk | |
| Telkomsel | Telkomsel Connect | |
| Telnyx, LLC | Telnyx Mission Control Self-Service Portal and API | |
| Telus | IP Trunking | |
| T-Mobile Netherlands B.V | Interoperability T-Mobile SIP Trunk | |
| ThinkTel | SIP Trunking | |
| toplink GmbH | tpl_sip.business LC | ✔ |
| T-Systems International GmbH | Corporate SIP Germany | |
| tw telecom | Managed SIP Services | |
| UPC Schweiz GmbH | Business Voice IP-PBX | |
| Verizon Business | IP Trunking Services | |
| Vodafone GmbH | IP Anlagen-Anschluss | |
| Vodafone Netherlands | Vodafone Office Voice (VoV) and Corporate Net over IP (CNoIP) | |
| Vodafone Next Generation Services Ltd | WXC SIPLink | |
| Voxbone SA | VoxDID, Vox800 | |
| West IP Communications | MaxxConnect | |
| Widevoice, LLC | SIMPLE LYNC TRUNK | |
| Windstream Communications | Dynamic IP | |
| WorldNet | WorldNet SIP Trunking | |
| XO Communications | XO SIP Services | |
| ZipTel | ZIPTELECOM SIP Trunk (TCP IPV4 only) | |
SIP Trunk Service Qualification Process
The SIP trunk service provider interoperability program qualifies services offered by providers that connect enterprise, on-premise Skype for Business voice networks to a service provider that offers PSTN origination, termination, and emergency services by using the SIP protocol.
If you are a vendor seeking to join the certification program, see How to Join for requirements and available programs.