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Aligning SIP requirements to WAN infrastructure takes time

What you need to measure when evaluating SIP services from your WAN services provider.


How different noise types affect the network

Learn about the different types of noise in data communication -- including thermal, intermodulation, cross-talk, impulse and shot noise -- and how they can affect your network.


The best VPNs for enterprise use

This slideshow highlights the best VPNs used in enterprise wide-area networks (WANs) and offers principles for designing and implementing virtual private network (VPN) clients in the enterprise.

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How to set up an Italian WAN without leaving your office

Provisioning and deploying a WAN and VPN is an everyday function for engineers. But can you do that for an office 4,000 miles away without leaving your office?

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Wide Area Network (WAN) Basics

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    WAN (wide area network)

    A wide area network (WAN) is a geographically distributed telecommunications network that interconnects multiple local area networks (LANs).

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    virtual private network (VPN)

    A virtual private network creates an encrypted connection over a less secure network when the network infrastructure cannot provide enough security to connected systems.

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    ISDN (Integrated Services Digital Network)

    ISDN (Integrated Services Digital Network) is a set of CCITT/ITU standards for digital transmission over ordinary telephone copper wire, as well as over other media.

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