“invalid additional extension range” error for dial plan on BE3000

[justrami]

We are trying to implement the following dial plan.  We keep getting and “invalid additional extension range” error. 3-digit extensions from 200-399. Main number is 623xxxxxxx. Feature code is flexible. We would like to use 0 for operator and 9 for outside line. Is there a way to implement this?  Dial plan suggestions are appreciated.

*Partner Question using 8.6.3*

[justrami]

You will need to set your additional allowed extension as “200-299,300-399”. Since your main number is “623xxxxxxx” and you need 3 digit extension length, Default Allowed Extension will be “000-099”. So the system will not allow you to choose 0 for operator.

**FOLLOWUP QUESTION FROM PARTNER**

What is the significance of the “main number”?  It looks like we can translate inbound numbers, so can we just arbitrarily assign a main number where the 3rd digit from the end is not 0 and then use 0 for operator?

The “Main Number” is equivalent to the “Front Desk / Operator’s” Number.  When you create a user, by default the “External Caller ID” for that user will be set to the “Main Number”. The reason is, if the user does not have a DID, when a call is made from his/her phone the caller number will be sent as the main number. This way, the PSTN side can call