RONR Newbie

Our nonprofit organization is calling for a special meeting to address an issue at hand. Our Bylaws do not allow for conference calls, however there are people who cannot attend due to distance, conflicts, etc. These people will not be allowed to vote based on the understanding around the Bylaws not allowing calls. Can these people still allowed to discuss via conference call? Or since our Bylaws do not allow conference calls, are they prohibited from any participation in the meeting?