Unable to call US number - rejected by service provider 487

Hi,
I'm having a hard time finding a resolution to my problem online... We are trying to dial a US (international) number, but the message we receive is that the call is rejected by the service provider, reason 487. Canada-wide calling is working for both incoming and outgoing calls. I also have $5 of world credits still sitting in my account.
In the call logs, the disconnect reason is "Normal call clearing" with a 0 second duration. I'm using the Obi200 adapter and using voip4.freephoneline.ca because we're using Rogers cable for internet with the Hitron modem.
If anyone has any ideas on how to resolve this, it would be greatly appreciated if you could share your thoughts.
Thanks!
I'm having a hard time finding a resolution to my problem online... We are trying to dial a US (international) number, but the message we receive is that the call is rejected by the service provider, reason 487. Canada-wide calling is working for both incoming and outgoing calls. I also have $5 of world credits still sitting in my account.
In the call logs, the disconnect reason is "Normal call clearing" with a 0 second duration. I'm using the Obi200 adapter and using voip4.freephoneline.ca because we're using Rogers cable for internet with the Hitron modem.
If anyone has any ideas on how to resolve this, it would be greatly appreciated if you could share your thoughts.
Thanks!