This guide is outdated. How does direct SIP work? The way direct SIP calls are initiated is very similar to the way sending an email works. A caller can call a callee from either a stand alone SIP phone which is not registered to any SIP server, to a VoIP provider, or from a SIP phone registered to an IP PBX, which supports direct SIP. If a user calls "[email protected]" [...]
This guide is outdated please refer to the latest guide. Ten tips for a more secure IP PBX System If you are in charge of a VoIP system or planning to deploy one, then VoIP security is probably one of your main considerations. In this article we present ten simple tips that could help make an IP PBX System more resilient to network attacks. Protect the administrative interface [...]
When a SIP based VoIP call is established, the audio or video sent between two SIP entities or more is streamed. Since many different codecs are supported by different devices or software, and each individual SIP entity taking part in the call does not know the IP address of the other SIP entity or to which port the stream should be sent to, SDP is used to advertise such detail [...]
When media is streamed in a SIP based voice over IP call, being audio, or video or both, one of the requirements is for the participants to know the media details, i.e. transport address, transport protocol, codec, ports and other session description metadata. SDP, also known as Session Description Protocol is the protocol used with SIP (session initiation protocol) to advertis [...]
This document explains step by step how to upgrade the firmware of your Patton to the latest version. This doc uses the Patton 4554 as an example, however all other Patton devices follow an almost identical procedure. Step 1: Download the appropriate firmware for your Patton 1. Go to the firmware repository on the Patton website. 2. Now choose the Smartware firmware version you [...]
Busy Lamp Field (BLF) is a light on an IP phone which tells you whether another extension connected to the same PBX is busy or not. This has to be configured manually from the phone user and it is usually done by making use of the web interface. When configured, the phone subscribes to a resource list available on an IP PBX to be notified with such information about other exten [...]
Five Questions to Help You Decide Which Telephone System Is Best for Your Business There are various options in the market nowadays when it comes to business telephone systems; therefore it can be a challenge to decide which telephone system is best for your organization. In this article we have put together five useful questions that every businessperson should ask him/herself [...]
As seen in a previous article, STUN protocol plays an important role in VoIP implementations: to discover the presence of NAT and to learn and use the bindings allocate to the client by the NAT. In this article, we will look into details of the STUN protocol itself. The STUN Protocol STUN is a client-server protocol. A STUN client (typically embedded in VoIP software, such as a [...]
This FAQ explains how to configure your Patton Gateway for the first time by connecting it to the network, discovering it’s IP Address and then configuring the network settings. You will then be able to import the configuration to it. There are 2 ways to log into a Patton Device. Connecting a Patton to the network using the Patton SmartNode Discovery Tool Step 1: Connect the de [...]
As seen in Part 1 of this article, STUN enables a SIP entity running behind a NAT to discover its public IP and what type of NAT is running on the gateway it is connected to. It also enables the SIP entity to discover which port external SIP entities can connect to, to establish a connection. Since SIP uses UDP as transport protocol, and UDP is not a connection oriented protoco [...]