Remote work is becoming increasingly common and there are multiple solutions to accomplish this. The simplest method is to establish a call forward to your cell phone which can be done through programming on the phone using special codes but there are limitations with this. Other options include mobile softphones, IP phones that can connect to the home office or SIP solutions. These typically require some more advanced programming and/or licensing.
In most cases it is best to discuss your needs with your phone vendor who can engineer the best solution for you.