Remote test access system for isdn testing

Details Remote test access system for isdn testing Remote test access system for isdn testing

H - Electricity

04

L

344/1

H04L 12/52 (2006.01) H04L 1/24 (2006.01) H04L 12/26 (2006.01) H04L 29/06 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 1335832

Conformance with established standards and interoperability between products in an integrated services digital network (ISDN) system defined by a layered hierarchy of interrelated protocols is ascertained by remotely testing the protocols between a tester in a local testing centre and a system under test located at a geographically removed site. The protocols tested relate to the first three layers of the system which are concerned mainly with the establishment, holding and release of a telecommunications path. Cost effectiveness in product testing is achieved by accessing both the tester and the system under test and communicating test procedures between the local and remote sites over a packet switching network to support testing at the remote site. Communications over a virtual circuit in the network are established between a pair of remote ISDN test access interfaces, one located at each site. A communications path from a test access interface and its corresponding local tester or system under test is provided by an ISDN interface. Under software control by a computer at each site, the test access interfaces function individually to split the corresponding ISDN interface so that the network may be inserted therebetween to link the tester with the system under test.

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