3CX FAQ IP PBX FAQ 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 3CX Phone System FAQ 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)? What operating systems does 3CX Phone System support? How can I use the 3CX Tunnel with a SIP hardphone? How do I configure my Linksys router for 3CX Phone System? Why can you not use Microsoft ISA server? How can I translate the Prompt Sets? How can I run 3CX Call Reporter remotely? What phones, gateways and firmware have you tested 3CX Phone System V5.1 with? 3CX PhoneSystem Database Server optimization and improved logging How do I install Microsoft Fax services on Windows 2003 for 3CX? How do I install Microsoft Fax services on Windows 2008 for 3CX? 3CX SIP/RTP Tunneling Service supported and unsupported modes How to install the Microsoft Windows Vista fax client? When calling from 3CX VOIP Client, a dual Ring Tone is heard. How do I disable this? How to install the Microsoft Windows XP fax client? How can I launch a call from a web based CRM package? What is a SIP domain and how do I configure it correctly? How to solve Source identification errors How does 3CX know its an external extension? How does 3CX Phone System decide whether a call is internal or external? How do I configure 3CX Phone System to work with SIP trunks? The 3CX Firewall Checker How does Phone provisioning work? How do I create a phone provisioning template? What is the cause of Installer error 2738, when installing 3CX? How can I adjust the configuration for unsupported VOIP providers or gateways? 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 request support from 3CX How to use fax if using multiple network interfaces How can I localize 3CX Phone System? 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? Do you have a build history detailing changes? Does 3CX Phone System work with BroadVoice? Does 3CX VOIP Phone System work with Vonage? How can I analyze / troubleshoot a SIP call?