- Joined
- May 7, 2021
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- 14
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I am in the process of setting up a new 3CX server to replace an existing FreePBX server. I'm trying to create a ring group and assign it an extension of 7777. However, when I try to save the new ring group I get an error stating "Given DN number cannot be used". I can not find 7777 used anywhere on the system. Does anyone know what might be causing this error?