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DS1
A phone line connection with data rates of 1.544Mbits per second over 24 channels running at 64Kbs.
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In-Service Electrical Continuity Test Card
Cisco ONS 15454
The Cisco ONS 15454 In-service Electrical Continuity Test Card is a solution for confirming proper DS-1 and DS-3/EC-1 cabling between the Cisco ONS 15454 shelf assembly electrical interface adapter (EIA) panels and the user's patch panels. The solution is designed for shelf installations that are presently carrying traffic and tests for common wiring errors including electrical shorts, opens, wrong connections, and tip/ring reversals.
