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公开(公告)号：CA1106513A
公开(公告)日：1981-08-04
申请号：CA319090
申请日：1979-01-04
Applicant: NORTHERN TELECOM INC
Inventor： THROOP C TERRY , MOFFETT RICHARD E , HEMMERT JOHN R , SAWYER ROBERT E JR
Abstract: Telephone signalling test apparatus is provided for monitoring telephone lines under live traffic conditions. The apparatus is modular with a main frame having a line interface and central control and storage unit, as well as numerical display.
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