TechnologyVoIP ApplicationsDescriptionA Route Group is a list of one or more gateways or ports on gateways that are seen as equal access. It is analogous to a trunk group in traditional PBX terminology. For instance, you may have two PRI circuits to ...

IntroductionA site-to-site VPN allows offices in multiple fixed locations to establish secure connections with each other over a public network such as the Internet. Site-to-site VPN extends the company's network, making computer resources from one l...

What is VPN?A VPN or Virtual Private Network is a method used to add security and privacy to private and public networks, like WiFi Hotspots and the Internet. VPNs are most often used by corporations to protect sensitive data. However, using a person...

IntroductionThe IEEE 802.3af is more commonly known as Power over Ethernet. This standard states that power may be delivered by an end-point power source, using either the active data wires of an Ethernet port or the spare wires, to a powered device....

DescriptionAdaptive Differential Pulse Code Modulation (ADPCM)Complete  DefinitionAdaptive DPCM (ADPCM) is a  variant of DPCM which in  term is a  form of PCM, DPCM varies the size of  the quantization  step, to allow further reduction of the require...