486 Busy Here when calling specific number

[TheBellSystem]

Hi Folks,

So when calling a certain number from our PBX we get a 486 Busy Here message. If I call this number from a cell phone or landline it works fine. We are using Bandwidth.com. I also see a 407 Proxy Auth Required message, not sure if that is related. The trunk settings are default. Our DIDs are entered with wildcards and our outbound caller ID is 10 digits and matches our primary DID.

Does anyone have any ideas what is causing it?

 

[AWS2P]

did you ask Bandwith.com if there is not a problem on their side?

 

[leejor]

our outbound caller ID is 10 digits and matches our primary DID.

Have you tried changing the CID, to see if it is being blocked, because of the particular number you are sending? Perhaps they have it on a SPAM list. CID would be the only way the recipient could "screen" the call if that is what's happening. Short of that, as suggested, speak with your provider for assistance.