For Nortel/Meridian phone systems, can you remote access the voicemail of the main office number (operator)? When i enter the 3 digit extension and password, it says combination invalid. I know password is correct because it works when i access the voicemail onsite. We can contact the operator/front desk by dialing 0 or a designated 3 digit extension but that 3 digit extension does not work when trying to remote access the main office voicemail. Any help would be appreciated. Ron