INTERNATIONAL  TELECOMMUNICATION  UNION

		     ITU-T RECOMMENDATION SUMMARY


Rec. No. : I.311

Title :	B-ISDN  General  network  aspects

Study Group : XVIII - ISDN

Version : New

Date of adoption : 1991

Notes :	


Recommendation I.311 describes networking techniques, signalling 
principles, traffic control and resources management for B-ISDN.

Networking techniques:

B-ISDN networking techniques include network layering aspects and 
applications of the virtual path and virtual channel.

Signalling principles:

In B-ISDN, the use of the asynchronous transfer mode (ATM) allows for 
a multiplicity of service types and characteristics and for the locial 
separation of signalling from user information streams. A user may have 
multiple signalling entities connected to the network call management 
via separate ATM virtual channel connections. Recommendation I.311 
identifies the signalling capabilities needed in B-ISDN and the 
requirements for establishing signalling communication paths.

Traffic control and resource management:

The B-ISDN, which is based on the ATM technique, is designed to 
transport a wide variety of traffic classes satisfying the required 
performance in terms of user and network requirements. To cope with 
these requirements, an ATM-based network will provide the following 
traffic control capabilities: connection admission control, usage 
parameter control, priority control, congestion control.



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