> 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.md).

# SIP Trunking

- [Configuration of Phone Numbers](https://docs.didforsale.com/sip-trunking/configuration-of-phone-numbers.md)
- [Configuring SIP to IP Account](https://docs.didforsale.com/sip-trunking/configuration-of-phone-numbers/configuring-sip-to-ip-account.md)
- [Configuring Custom Dial Plan to a Phone Number](https://docs.didforsale.com/sip-trunking/configuration-of-phone-numbers/configuring-custom-dial-plan-to-a-phone-number.md)
- [Configure SIP to SIP Account](https://docs.didforsale.com/sip-trunking/configuration-of-phone-numbers/sip-to-sip-account.md)
- [Set up Call Forwarding to a Phone Number](https://docs.didforsale.com/sip-trunking/configuration-of-phone-numbers/call-forwarding.md)
- [http URL Forwarding Setup](https://docs.didforsale.com/sip-trunking/configuration-of-phone-numbers/http-setup.md)
- [Webhook Setup](https://docs.didforsale.com/sip-trunking/configuration-of-phone-numbers/webhook.md)
- [FAX](https://docs.didforsale.com/sip-trunking/configuration-of-phone-numbers/fax.md): No FAX machine? No worries, Send and receive FAX through EMail!
- [Receive FAX](https://docs.didforsale.com/sip-trunking/configuration-of-phone-numbers/fax/receive-fax.md)
- [Fax through SIP Account](https://docs.didforsale.com/sip-trunking/configuration-of-phone-numbers/fax/fax-through-sip-account.md)
- [Send FAX](https://docs.didforsale.com/sip-trunking/configuration-of-phone-numbers/fax/send-fax.md)
- [Adding IP Address](https://docs.didforsale.com/sip-trunking/ip-configuration.md): Setup IP based authentication with DIDForSale SIP Trunk Gateways
- [Creating SIP Account](https://docs.didforsale.com/sip-trunking/sip-account.md): SIP Account based Interconnection to handle PBX behind Firewall or Special SIP Configurations
- [VoiceMails](https://docs.didforsale.com/sip-trunking/sip-account/voicemails.md): DIDForSale offer Free Voicemail Service for SIP Accounts configured directly with endpoints.
- [SIP Trunk Interconnection Guide](https://docs.didforsale.com/sip-trunking/sip-trunking.md): DIDForSale SIP Trunks are compatible with most SIP based PBX, Business Phone Systems and Devices.
- [3CX](https://docs.didforsale.com/sip-trunking/sip-trunking/3cx-configuration-guide.md): 3CX is a software-based IP PBX that allows you to enjoy Windows on premise-based IP PBX Services without having to buy an expensive, proprietary PBX appliance.
- [SIP-based Configuration](https://docs.didforsale.com/sip-trunking/sip-trunking/3cx-configuration-guide/sip-based.md): Configure your 3cx Sip trunk with DIDForSale SIP Trunking Services using SIP based registration.
- [IP-based Configuration](https://docs.didforsale.com/sip-trunking/sip-trunking/3cx-configuration-guide/ip-based.md): Configure your 3cx Sip trunk with DIDForSale SIP Trunking Services using IP based registration
- [Allworx](https://docs.didforsale.com/sip-trunking/sip-trunking/allworx.md): Allworx is VoIP communication platform that helps SMBs create a customized business phone system. It offers business phone systems, IP phones, network switches, and advanced software
- [Asterisk](https://docs.didforsale.com/sip-trunking/sip-trunking/asterisk.md): Asterisk is a free and open source platform sponsored by Digium. The open source Asterisk platform is used by businesses of all sizes in both public and private sector to build communication applicati
- [CISCO UCM](https://docs.didforsale.com/sip-trunking/sip-trunking/cisco-ucm.md): Cisco IP Phones, UCM & SPA change the communications experience, adding new collaboration modes to VoIP, such as HD voice, video, conferencing, and wireless.
- [FreePBX](https://docs.didforsale.com/sip-trunking/sip-trunking/freepbx-trunk-configuration.md): FreePBX is a free and open source platform built on top of Asterisk sponsored by Digium. It is the registered trademark of Sangoma Technologies and is used by to build communication applications
- [FreePBX PJSIP Configuration](https://docs.didforsale.com/sip-trunking/sip-trunking/freepbx-trunk-configuration/freepbx-pjsip-configuration.md): Configure FreePBX Sip Trunking with PJSIP IP based Configuration
- [IP-based](https://docs.didforsale.com/sip-trunking/sip-trunking/freepbx-trunk-configuration/freepbx-pjsip-configuration/ip-based.md): Configure FreePBX PJSIP Trunking with IP based interconnection with DIDForSale. This configuration has been tested on FreePBX Version 14.0.5.2 'VoIP Server'
- [SIP-based](https://docs.didforsale.com/sip-trunking/sip-trunking/freepbx-trunk-configuration/freepbx-pjsip-configuration/sip-based.md): Configure FreePBX PJSIP Trunking with SIP based interconnection with DIDForSale. This configuration has been tested on FreePBX Version 14.0.5.2 'VoIP Server'
- [FreePBX ChanSIP Configuration](https://docs.didforsale.com/sip-trunking/sip-trunking/freepbx-trunk-configuration/freepbx-chansip-configuration.md)
- [IP based](https://docs.didforsale.com/sip-trunking/sip-trunking/freepbx-trunk-configuration/freepbx-chansip-configuration/freepbx-chansip-ip-based-registration.md): Configure FreePBX ChanSIP SIP Trunking with IP based interconnection with DIDForSale. This configuration has been tested on FreePBX Version 14.0.5.2 'VoIP Server'
- [SIP based](https://docs.didforsale.com/sip-trunking/sip-trunking/freepbx-trunk-configuration/freepbx-chansip-configuration/chansip-sip-trunk-registration.md): Freepbx configuration guide for SIP setup using chan\_sip trunk.
- [FreeSwitch](https://docs.didforsale.com/sip-trunking/sip-trunking/freeswitch.md): FreeSWITCH is a free & open-source application server for real-time communication, WebRTC, telecommunications, video & VoIP. Build PBX systems, IVR services & videoconferencing
- [FusionPBX](https://docs.didforsale.com/sip-trunking/sip-trunking/fusionpbx.md): FusionPBX is built on top of FreeSwitch & can be used as a highly available single or domain based multi-tenant PBX, carrier grade switch, call center server, fax server, VoIP server, voicemail server
- [GoAutoDial](https://docs.didforsale.com/sip-trunking/sip-trunking/goautodial.md): Goautodial is an open-source call center software suite that provides tools for inbound, outbound, and blended call handling. It offers features like auto-dialing, campaign management, and call record
- [GDMS UC](https://docs.didforsale.com/sip-trunking/sip-trunking/gdms-uc.md): GDMS(Grandstream Device Management System) Unified Communication It’s a cloud-based management platform for provisioning, monitoring, and controlling Grandstream devices and Cloud PBX
- [Getting Started](https://docs.didforsale.com/sip-trunking/sip-trunking/gdms-uc/getting-started.md)
- [Portal Overview & Key Tabs](https://docs.didforsale.com/sip-trunking/sip-trunking/gdms-uc/portal-overview-and-key-tabs.md)
- [Grandstream Cloud PBX](https://docs.didforsale.com/sip-trunking/sip-trunking/grandstream-cloud-pbx.md)
- [DIDForSale Integration](https://docs.didforsale.com/sip-trunking/sip-trunking/grandstream-cloud-pbx/didforsale-integration.md)
- [Outbound Routes](https://docs.didforsale.com/sip-trunking/sip-trunking/grandstream-cloud-pbx/outbound-routes.md)
- [Inbound Routes](https://docs.didforsale.com/sip-trunking/sip-trunking/grandstream-cloud-pbx/inbound-routes.md)
- [Grandstream Devices](https://docs.didforsale.com/sip-trunking/sip-trunking/grandstream-devices.md): Grandstream Networks is a manufacturer of IP voice & video communications equipment, video surveillance, gateways and ATAs, and Asterisk-based IP-PBX appliances.
- [GrandStream 6102 IPPBX](https://docs.didforsale.com/sip-trunking/sip-trunking/grandstream-devices/grandstream-6102-ippbx.md)
- [Grandstream 6104 IPPBX](https://docs.didforsale.com/sip-trunking/sip-trunking/grandstream-devices/grandstream-6104-ippbx.md)
- [GrandStream 502 | HT801 | HT802 | HT813](https://docs.didforsale.com/sip-trunking/sip-trunking/grandstream-devices/grandstream-502-or-ht801-or-ht802-or-ht813.md)
- [HoduSoft PBX System](https://docs.didforsale.com/sip-trunking/sip-trunking/hodusoft-pbx-system.md): HoduSoft PBX system streamlines business voice communication, while their Contact Center solutions empower exceptional customer service and engagement.
- [Microsoft Skype for Business](https://docs.didforsale.com/sip-trunking/sip-trunking/microsoft-skype-for-business.md): It is unified communications platform that integrates common channels of business communication & online meetings, including instant messaging, presence, VoIP, voicemail and more.
- [NEC Corporation](https://docs.didforsale.com/sip-trunking/sip-trunking/nec-corporation.md): NEC Corporation is a Japanese multinational provider of IT services and products. It provides IT and network solutions to business enterprises, and communications services providers.
- [PBXinaFlash](https://docs.didforsale.com/sip-trunking/sip-trunking/pbxinaflash.md): PBXinaFlash is Lean, Mean Asterisk Machine, high-performance, turnkey Asterisk PBXs that are easy to upgrade. Features include CentOS/SL 6.9 support and Asterisk 13 with FreePBX 13 GPL modules.
- [Polycom OBi300](https://docs.didforsale.com/sip-trunking/sip-trunking/polycom-obi300.md): Configure OBi300 VoIP adaptor for Analog Phone and Fax Machine
- [ShoreTel PBX](https://docs.didforsale.com/sip-trunking/sip-trunking/shoretel-pbx.md)
- [Vital PBX](https://docs.didforsale.com/sip-trunking/sip-trunking/vital-pbx.md)
- [Yealink Phones](https://docs.didforsale.com/sip-trunking/sip-trunking/configure-yealink-phones.md): Yealink is a global leading provider of unified communication & collaboration solutions. It has built up a panoramic collaboration solution of audio and video conferencing by merging its cloud service
- [ZYCOO](https://docs.didforsale.com/sip-trunking/sip-trunking/zycoo.md): ZYCOO IP telephony system offers an easier, more reliable and cost- effective solution for Small and Medium Organizations.
- [DIDForSale Softphone](https://docs.didforsale.com/sip-trunking/desktop-dialer.md): DIDForSale Desktop softphone lets you register from your computer to make and receive phone calls.
- [Zoiper Softphone Application](https://docs.didforsale.com/sip-trunking/configure-zoiper-app.md): Download zoiper app on your device and configure DIDforsale SIP account using that.
- [Iphone App](https://docs.didforsale.com/sip-trunking/configure-zoiper-app/iphone-app.md): Configure SIP account on your iPhone Application
- [Grandstream Wave Mobile Application](https://docs.didforsale.com/sip-trunking/grandstream-wave-application-configuration.md)
- [Enable Call Recording](https://docs.didforsale.com/sip-trunking/enable-call-recording.md): This feature allows you to enable and access to the incoming call recording.
- [Call Transcription](https://docs.didforsale.com/sip-trunking/call-transcription.md): This feature allows you to transcribe a call.