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UCM trunk not registered

Get outside calls working again.

Grandstream UCM device
What you needAffects
Admin access to the UCM web portalAll outside calls

1. Check it

  1. LoginRe-check the host name, username and password.
  2. InternetCheck the UCM has internet access.
  3. SIP ALGTurn off SIP ALG on your router.

2. Ask your provider

Confirm the account is active.

Troubleshooting

ProblemLikely cause and fix
403Wrong password.
No responseWrong host, or a firewall blocks it.
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