INTERNATIONAL  TELECOMMUNICATION  UNION

		     ITU-T RECOMMENDATION SUMMARY


Rec. No. : E.415

Title :	International network management guidance for common channel 
	signalling system  No. 7

Study Group : II - Network Operation

Version : New

Date of adoption : 1991

Notes :	


As the use of common channel Signalling System No. 7 increases, its 
performance becomes increasingly important to the network and the 
services it supports. Since problems in the signalling network can 
affect the switched networks that it supports, and vice versa, network 
managers must know the current status and performance of the common 
channel signalling network, as well as the various user application 
parts. Recommendation E.415 provides guidance on the requirements for 
the surveillance of the status and performance of Signalling System 
No. 7 signalling networks.

Signalling System No. 7 uses signalling links for transfer of 
signalling messages between exchanges or other nodes in the 
telecommunication network served by the system. The system is designed 
to ensure reliable transfer of signalling information in the presence 
of transmission disturbances or signalling network failures. The 
system may be provided with redundancy of signalling links and includes 
functions for automatic diversion of signalling traffic to alternative 
paths in case of link failures. (The Q.700-Series of Recommendations 
contains complete information on the design and operation of 
Signalling System No. 7).



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