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Slajd 13<br />
Basic definitions and categories<br />
call<br />
connection<br />
phases of call<br />
classification of signalling concepts and<br />
systems<br />
Slajd 14<br />
Call vs connection<br />
Call means formal association between two parties<br />
involving activation of information transfer protocol;<br />
has also meaning as object which can be created<br />
and destroyed. Many calls taken together create<br />
traffic stream.<br />
Connection has mainly technical meaning; it is<br />
creation of technical means for information<br />
transportation<br />
In telephone environment call = connection<br />
In B-ISDN environment we can have one call<br />
composed of many connections<br />
Slajd 15<br />
Classification (topological criterion)<br />
Inter-Customer Premises Equipment<br />
Signalling<br />
Intra-CPE Signalling<br />
Customer Line Signalling<br />
Interoffice Signalling<br />
Special Services Signalling<br />
Advanced Services Signalling
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