ShareLa conexión de una extensión externa a la Central Telefónica 3CX es solicitada con frecuencia, y puede ser extremadamente útil para enlazar pequeñas oficinas remotas y tele-trabajadores. Aquí veremos cómo utilizar diferentes modelos de teléfonos …

Using the recommended Firmware version is one of the keys for successful interoperability with 3CX PhoneSystem. From time to time, 3CX will release updates to the configuration guides that often include additional functionality that takes …

Share3CX Phone System incluye, a partir de la versión 8, la funcionalidad de configurar la zona horaria y DST (Daylight Savings Time) en los teléfonos a través de aprovisionamiento. 3CX Phone System es instalado con …

In this example we will demonstrate how to perform a blind and attended (consultative) transfer using a Cisco IP Phone SPA525G. We will assume that an incoming call will be received on the Cisco phone which is registered to Extension 103

ShareEsta guía ha sido probada con la versión de firmware 7.4.6. Tenga en cuenta que las revisiones de firmware diferentes pueden tener diferentes formatos de interfaz web y funcionalidad. Su teléfono podría haber sido entregado …

In order for 3CX Phone System to communicate successfully with VoIP providers and Remote Extensions, your firewall/router device must be configured for SIP operation. To maximize your chances of success, make sure you choose a …

We are happy to announce a release candidate for 3CX Phone System v8! New additions in this release candidate are: Support for Polycom BLF Support for Polycom Side car Support for Berofix BRI and PRI Gateway cards Support for the new Cisco 5XX range of IP phones You can download RC1 here: http://www.3cx.com/downloads/3CXPhoneSystem8.exe You can download the latest 3CX Assistant (with optionally integrated CRM and 3CXPHone) here: http://www.3cx.com/downloads/3CXAssistantSetup_80.exe You can find a log of changes  here . Please post feedback here

During set-up you are prompted to enter the FQDN of the phone system server OR the SIP domain. This SIP domain is used if you wish to use Direct SIP calls ( more info here ), but it also affects your installation in case you wish to use FQDNs in the phone configuration. If you intend to address the PBX using IP Addresses only, and do not intend to use “Direct SIP”, then all you will need to do is enter the PBX’s Private IP Address in the SIP Domain field. The rest of this document will not apply

If you are using a VOIP provider, you will need to have a firewall that supports and is configured to use static port mapping. Static port mapping is required for RTP, the protocol that carries audio, to be able to function correctly. RTP and Symmetric NAT VOIP applications use the RTP protocol to send and receive audio and video streams, tend to have problems behind a firewall or a router since RTP uses random ports to send and receive audio or video streams. Incorrect firewall configuration will cause calls made via a VOIP providers or to remote extensions to have no audio or one way audio only. When using Symmetric NAT, the firewall/router will change the port on which the audio is received, on the fly.

In the VoIP / telecommunications  field, the term QoS (Quality of Service) refers to resource reservation control mechanisms. Quality of service is the ability to provide different priority to different applications, users, or data flows, or to guarantee a certain level of performance to a data flow.  Quality of service guarantees are important for VoIP since VoIP is real time and requires fixed bit rate. QoS mechanisms are not required if there is no network congestion. For more information on QOS, refer to the Cisco Internetworking Technology Handbook chapter called Quality Of Service (QoS)