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Q.

What is the difference between ATM and STM ?

Tags: atm, stm
Asked by mohandas pai, 01 Aug '09 10:27 pm
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Answers (4)

1.

I think Diff between ISD and STD
Answered by Motu, 26 Sep 05:01 pm

 
  
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2.

STM cud be synchronous transmission module or Scanning tunneling microscopy ...which one u want.
ATM everybody knows!
Answered by harshal kalangutkar, 01 Aug '09 10:35 pm

 
  
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3.

You may have your terms mixed up. STM is the synchronous transmission module for SDH (synchronous digital hierarchy). SDH is a generic layer 1 protocol similar to the north american SONET. SDH is an advance on time division multiplexing (interleaving 64k channels) - the STM frames are T1 or higher multiplexes. STM-1 is a standard speed of 155Mb/s.

On the other hand ATM is asynchronous transfer (transport) mode - a layer 2 datalink protocol for WANs. Telcos use ATM to multiplex ADSL channels into (typically) DS-3 hand-offs to internet providers, but ATM isn't primarily a multiplexing protocol.

from web.
Answered by anantharaman, 01 Aug '09 10:33 pm

 
  
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4.

Diff between ISD and STD
Answered by shambu, 01 Aug '09 10:28 pm

 
  
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