Impulse Advanced Communications

Fiber Support

Basic Fiber troubleshooting steps

Please ensure you have performed the following steps before calling the Impulse support center.

  1. Locate your router.  This will probably be a device made by Cisco or Adtran with fewer than six network connections.  It should be connected to the Fiber line directly as well as to your firewall or ethernet switch.
  2. Verify that the router is powered.  Look for a power light on the unit.
  3. Determine if the Fiber Circuit is up.
    • For Cisco routers, there will be a rectangular metal module with a faceplate about the size of a pack of chewing gum.  There are three lights visible behind holes labeled CD, AL, LP.  If the fiber is operating correctly there should only be a green light for CD and the other two should be dark.  An amber light for AL means that the fiber is in Alarm.  An amber light for LP means that the circuit is being tested and unavailable for use.
    • For Adtran routers, there will be one or more front panel lights labeled NET.  A green light indicates that the fiber is up and working.  A red light means the fiber is in alarm.  A dark indicator represents a fiber that is not provisioned.
  4. Once you have gathered this information please call the Impulse support center Toll Free at 877.692.2345 or 805.456.5800.
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