Unable to fax or receive fax

[TammyL-Xerox]

Hello aparker@fieldsig.com, 

I looked up the error code and the only information is that the number you're trying to fax is busy.  If this is happening to more than one fax number and powering off/on your devices doesn't fix the issue I would suggest calling into the support department for additional assistance @ 1-800- 821-2797.

[aparker@fieldslg.com]

I tried to send a fax, but I just get error: 033-503 which states the line is busy.  Any suggestions as to get it work again?  Thanks!