What are the main distinctions between public switching technique and virtual trunking technique in communication?
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Hannah Smalltree, Editorial Director
Your question is not totally clear, but let me at least provide a
distinction between the "PSTN - Public Switched Telephone Network" and
"VPN - Virtual Private Network" in case that is what you're referring
to. The PSTN is the network we all use for voice calls, whether to our
friends and family, or to call centers. The PSTN handles toll and
toll-free calls, and generally (historically) uses circuit-switching. A
VPN is really a data network that is managed to meet service
commitments, and uses the public network. It leverages bandwidth on
public network facilities to provide connectivity between defined sites.
It provides guaranteed bandwidth and associated management of that
bandwidth to meet performance goals, and is cheaper than having private
lines. Thus, it gives you the capabilities of a private network without
having to secure such facilities exclusively for your needs. With the
advent of Voice over IP, voice communications can be sent over a VPN.
There have been similar services (private network services over public
network facilities) for voice communications over the TDM network for
many years.
If you need further clarification, email us at editor@searchCRM.com.
This was first published in February 2004