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Enabling Local, Network, and Payload Loopback

To enable local, network, or payload loopback testing of a T3 or E3 line, use the clock source and loopback commands from Controller Configuration mode.

  1. Change the clock source to internal.
    host1(config-controll)#clock source internal module
  2. Specify a loopback.
    host1(config-controll)#loopback local

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