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Dear friends
I am looking for the difference between HSL over TDM and HSL over ATM: the principles, standards and dimensiontion guide. Can anybody help me? many thanks!!
Hi Tuannd,
As I know that the HSL is over ATM, but its can be over TDM but its will be as simulation and its will be 30 % use of the 2 Mbps.
Also in TDM you can use the total bandwidth or the total E1 but fractional 30 channels .I want to know difference between TDM HSL and ATM HSL
Can anybody describe a little what is the difference between ATM and TDM?
Would you please help me to get the formula how to calculate link load (in erlangs) for ATM-HSL (High speed link) .
Want to know ATM HSL Bandwidth
ATM and TDM are two types of data transfer technologies. TDM stands for Time-division multiplexing, which is a method of combining multiple data streams into one and sending it together over one signal. ATM stands for Asynchronous Transfer Mode. It is based on a fixed “cell” that is used to convey a Multimedia payload, i.e. Voice, Data, etc..
Summary: ATM uses “cells” whereas TDM uses a “nailed up” TimeSlot to convey information. Internally, HSL uses ATM “cells”.
Over 20 years ago when TDM was overloaded with the signalling load there was the move to 2Mbits/s HSL. This was an interim step before the full adoption of Sigtran (SS7overIP).
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