Smart Jack

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  • Smart jacks are normally used with leased line circuits such as T1 and ISDN.
  • The smart jack: is a diagnostic point for the provider and is generally the demarcation point.
  • The smart jack has largely replaced the RJ-48C electromechanical jacks.
  • Smart jacks allow the provider to convert protocol and framing types from th provider’s network.
  • The router still requires a CSU/DSU, but the smart jack can change the framing type the CSU/DSU expects.
    • The smart jack also offers advanced diagnostic capabilities to the provider.
    • Smart jacks allow the provider to put the circuit into a loopback mode.
    • This loopback mode: enables the provider to diagnose the signal quality and error rates.
    • The smart jack also offers alarm indication signaling so the provider can determine whether the problem is on their premises equipment or the customer’s.
    • This alarm indication signaling enables the provider to dispatch technicians when the problem is discovered.