> For the complete documentation index, see [llms.txt](https://docs.didforsale.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.didforsale.com/sip-trunking/sip-trunking/microsoft-skype-for-business.md). # Microsoft Skype for Business It is unified communications platform that integrates common channels of business communication & online meetings, including instant messaging, presence, VoIP, voicemail and more. To get detailed step-by-step directions you can follow the instructions laid down in our Microsoft Skype for Business SIP Trunk integration guide by following the link below. ## [Microsoft Skype for Business Interconnection Guide](http://www.didforsale.com/wp-content/uploads/2023/12/Skype-for-Business-Server-SIP-Trunk-Configuration.pdf) Below, you will find a general guide on how to integrate a PBX/Phone system with our service. If you encounter any challenges or need further assistance, please reach out to our dedicated support team at **** or **1-800-579-7676**. ## Integration Steps **Access Your PBX/Phone System Settings:** \ Log into your PBX/Phone system admin portal. Navigate to the settings or configuration section. **Locate SIP/VoIP Settings:** \ Look for SIP or VoIP settings within your PBX/Phone system interface. Find options related to trunking, SIP configuration, or VoIP integration. **Create SIP or Add your PBX IP:** * **Adding IP Address**: * **Creating SIP Account**: **Configure SIP/VoIP Settings:** \ Input the SIP credentials provided by DIDForSale. These typically include SIP server address, username, password, and authentication details. Ensure that codecs (g711, ulaw & alaw) and other audio settings align with our recommended configurations. **Network Configuration:** \ Check firewall and network settings to ensure traffic from our service is allowed. Whitelist our server IP addresses if your system has security features. Get a list of our IPs here: **Configuration of DID number:** \ Follow the link for instructions: **Testing and Verification:** \ Make test calls to confirm the integration. Test both incoming and outgoing calls for quality and reliability. Test additional features like voicemail, call forwarding and conference calls. Contacting Support: If you encounter any difficulties during the integration process or have questions specific to your PBX/Phone system, please don’t hesitate to contact our support team. We are available via email at **** or by phone at **1-800-579-7676**. Our experts are ready to assist you and ensure a seamless integration experience.