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IP Communications and Services for NGN
book

IP Communications and Services for NGN

by Johnson I Agbinya
December 2009
Intermediate to advanced content levelIntermediate to advanced
411 pages
12h 24m
English
Auerbach Publications
Content preview from IP Communications and Services for NGN
235
12Chapter
Softswitch
Switching has evolved from circuit switching (CS), to packet switching (PS),
Internet Protocol (IP) switching, and multiprotocol label switching (MPLS).
e traditional public switched telephone network (PSTN) and the Internet (or
other Internet protocol-based networks) require specific paths for the traditional or
VoIP call to take from the source to the destination. Duplex channels are required
for transmit and receive operations. e traditional fixed-network Internet requires
three basic functions: routing, transmission, and billing. ese three requirements
must be translated for IP communications.
For the PSTN, most ...
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Publisher Resources

ISBN: 9781420070910