What is SIP?
The Session Initiation Protocol (SIP) is a signalling protocol used for establishing sessions in an IP network. A session could be a simple
Over the last couple of years, the Voice over IP community has adopted SIP as its protocol of choice for signalling. SIP is an RFC standard (RFC 3261) from the Internet Engineering Task Force (IETF), the body responsible for administering and developing the mechanisms that comprise the Internet.
The IETF’s philosophy is simplicity: specify only what you need to specify. SIP just initiates, terminates and modifies sessions.
TalkSwitch phone systems use the Appello® SIP Stack for VoIP communications. The Appello® SIP Stack was developed by TalkSwitch — a division of Centrepoint Technologies Inc.
What is a VPN? Can a VPN help me to carry data securely over the Internet?
VPN stands for Virtual Private Network. It is a means of having the advantages of a private network on a shared public infrastructure like the Internet. A VPN provides security by using encryption/decryption. Using a process called ‘tunneling’, private data is encrypted and then encapsulated before being sent across the network. These packets of information are sent to their destination. Only those with the correct protocol information are able to enter a company’s network.
A VPN is very useful for providing employees with remote access to the company network without compromising security. Encryption can have a negative impact on the call quality, as the overhead on the network connection is increased. For example, IPSec adds approximately 10 per cent overhead to VPN traffic.
What’s the difference between a Public IP Address and a Private IP Address?
A Public IP Address is a globally unique number that identifies a device on the Internet. If you want someone on the Internet to connect to you, they must know your public address. Also known as your “real” or “external” address.
Private IP Addresses are typically assigned to devices on a LAN (Local Area Network) and are not routable outside the LAN. Private IP Addresses are
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