• What is IVR / interactive voice response?
• What is a voice mail system?
• What is an auto-attendant?
• What are IP Phones / IP Telephones?
• What are SIP Phones?
• Microsoft Response Point vs 3CX Phone System for Windows
• VOIP FAQ & Info
• 10 reasons to switch to an IP PBX
• What is Unified Communications?
• What is FOIP - Fax over IP?
• What is T38?
• What different types of CODECS are there?
• How does FAX work in VOIP environments?
• Example of SIP Call session between 2 phones
• Can you list all known SIP responses?
• What are SIP Methods / Requests and Responses?
• What is a SIP-URI?
• What SIP-based IP PBX's are available?
• What is RTCP - Real Time Transport Protocol?
• What is RTP - Real Time Transport Protocol?
• What is ECHO cancellation?
• What is H323?
• What is SDP - Session Description Protocol?
• What is a VoIP Telephone?
• What is a PBX Phone System?
• What is Voice over IP?
• What is SIP - Session Initiation Protocol?
• What is DID - Direct Inward Dialing?
• What are the benefits of an IP PBX?
• What is a good source of VOIP info?
• What is a SIP server?
• What is a STUN Server?
• What does ENUM mean?
• Check out these VOIP blogs and VOIP links
• VOIP-defined
• IP PBX: How an IP PBX / VOIP phone system works
• What do the terms FXS and FXO mean?
• VOIP gateway information - Learn about VOIP gateways
• Sip phones / VOIP Phones types
• VOIP Definitions

• Why does Media Server report “binding failed”?
• Why can you not use Microsoft ISA server?
• How can I setup integration between 3CX and Salesforce.com?
• How can I view SIP traffic with a Network Capture tool?
• How do I configure a CISCO router for to allow connection to a VOIP provider?
• Why does 3CX require static port mappings (Full Cone NAT)?
• How can I use the 3CX Tunnel with a SIP hardphone?
• How do I configure my Linksys router for 3CX Phone System?
• What phones, gateways and firmware have you tested 3CX Phone System with?
• How do I install Microsoft Fax services on Windows 2008 for 3CX?
• How can I run 3CX Call Reporter remotely?
• How to install the Microsoft Windows XP fax client?
• How to install the Microsoft Windows Vista fax client?
• How do I import the call logs in the database so that I can create Call reports?
• How do I disable Internet Explorer Enhanced Security Configuration for Windows Server 2008
• What is the firewall checker and why do I need it?
• How can I check that the 3CX uninstall completely removed 3CX Phone System?
• How do I install Microsoft Fax services on Windows 2003 for 3CX?
• When calling from 3CX VOIP Client, a dual Ring Tone is heard. How do I disable this?
• How can I secure phone calls using OpenVPN?
• What is a SIP domain and how do I configure it correctly?
• How can I launch a call from a web based CRM package?
• What is the cause of Installer error 2738, when installing 3CX?
• How does 3CX Phone System decide whether a call is internal or external?
• How does Phone provisioning work?
• How do I create a phone provisioning template?
• How do I configure direct SIP Calls?
• Configuring Exchange Server 2007 Unified messaging with 3CX Phone System
• Can hotels with Micros Fidelio use 3CX Phone System?
• How to configure secure SIP
• How to convert a Cisco 7940 from SCCP to SIP
• What SIP Phones can I use with 3CX Phone System?
• What VOIP Gateways can I use with 3CX Phone System?
• What VOIP Providers have you tested 3CX Phone System with?
• How can I analyze / troubleshoot a SIP call?

• Nokia E65
• SNOM M3 (Recommended)
• Fring
• GrandStream HandyTone 386
• GrandStream HandyTone 286
• Polycom SoundPoint IP 301, 320,330,501,550 (provisioning)
• Polycom SoundPoint IP 301, 320,330,501,550
• Siemens C450IP
• Siemens C470IP
• Aastra 9133i SIP and Aastra 480i
• Linksys SPA-9XX (Using manual-provisioning)
• Yealink T28
• Aastra SIP-DECT (Recommended)
• Aastra 51i (Recommended)
• Aastra 5xi (Recommended)
• Polycom SoundStation IP6000
• Aastra (Using manual-provisioning)
• GrandStream GXP-2000
• 3CX VOIP Client (Recommended)
• How to auto-provision IP phones with DHCP 'option 66'
• X-Lite 3.0
• SNOM 300-320-360-370 (Using manual-provisioning)
• GrandStream GXP-2000 and GXP-2020 (Using manual-provisioning)
• Linksys SPA-901 (Recommended)
• SNOM 300-320-360-370-820 (Recommended)
• Linksys 3102 ATA and Fax - T38 Fax Pass-through
• Linksys SPA-962
• Linksys SPA-921/941 (Recommended)
• CISCO 7940

• Sangoma PRI with Netborder (Beta)
• VegaStream Europa 50 (2 x FXO, 4 x FXS) (Recommended)
• Patton SmartNode 4554 (Recommended)
• VegaStream Europa 50 (2 x BRI) (Recommended)
• Audiocodes MP-114 (2 x FXO, 2 x FXS) (Supported)
• Patton SmartNode 4960 (Recommended)
• GrandStream HandyTone 488 (Not supported)
• Audiocodes MP-114 & MP-118 (Supported)
• Patton SmartNode 4638 (Recommended)
• Micronet SP 5050, 5052, 5054 (Not supported)
• GrandStream GXW-4104 (Supported)
• LinkSys SPA-3102
• Patton SmartNode 4112/4114 (Recommended)
• Clipcomm CG410 (Not supported)
• SIPURA SPA-3000 (Not supported)

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