Setting the main company inbound number
Note: Before you begin, ensure that you already have some DIDs in the account. If you do not, see here for how to add new DIDs or see here for porting.
This article is for setting the inbound number. To set up the outbound caller ID, see this article
1. From Smart PBX, choose Main Number > Add from Spare Numbers

2. Check the DID(s), and choose Add selected numbers

4. Your account is now configured to receive calls from this DID

To set your outbound caller ID (the number your callers will see when you phone), see this article.