ACCESS POINTS ON NARROWBAND DATA CIRCUITS IN MODERN

Today’s transmission methods and equipment are robust and reliable and feature integrated network monitoring, troubleshooting, maintenance, and provisioning systems. However, public carriers and most major private networks have historically engineered their network’s physical plant to include access points at which they can gain quick and organized “hard-contact” access to any particular circuit path. Typically, these access points were comprised of analog jackfields with “line-drop-monitor” access capability. With these jackfields, craftpersons could passively monitor and/or intrusively test circuits, or perform circuit reconfigurations to bypass faulty paths or accommodate changes in traffic patterns....

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