Skip to main content


8x8 Support

Internal Server Error on Cisco IP Phones and SPA Adapters


Your Cisco desk phone or SPA adapter reads Internal Server Error on the display and prevents dialing out.

Applies To

Cisco desk phones and SPA adapters


Correct Invalid Star Code Entry

  1. Lift the handset.
  2. Dial [*][6][8].
  3. Hang up.
  4. Wait 30 seconds, then attempt to dial out again.

Please remember that *67 (caller ID blocking) and *69 (last number call back) are not supported on 8x8 service.


This is usually caused by keying in an invalid or unsupported star code, such as *67 or *69, which are known to cause this error. Click here for a list of Cisco SPA star codes.

  • Was this article helpful?