I RECEIVE PHONE CALLS FOR A SALESMAN. HE IS NOT IN OFFICE. I LIKE TO FORWARD THOSE INCOMING CALLS TO MY SALESMAN'S CELLPHONE. HOW CAN I DO THAT?

ALSO, WE HAVE ONLY 4 EMPLOYEES, NO VOICEMAIL.
ARE THERE ANY SIMPLE AND AFFORDABE VOICEMAIL SYSTME FOR OUR DBS 824 SYSTEM?