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Telecommunications technology is an ocean, the likes of which we have never seen before. We are at any point of time, seeing only the tip of the proverbial iceberg. There are sill a lot more things to be learnt.
Switching - My area of interest
Transmission - Digital Transmission Basics
Common Channel Signalling No. 7 ( CCS7 ) or Signalling System No. 7 ( SS7 )
The Indian National Numbering Plan
Do you live in Madras, and want to know what exchange serves you ?
My collection of Alcatel E10B-generated tones
How Madras is connected to the rest of the world
Visit to the Southern Railways switching and Transmission facility
manisridhar at hotmail dot com