The telephone is one of the most essential and essentially the most used method of communication today. On the subject of administrative center telephone techniques, the machine is particularly designed so that any number of users can use and share the similar telephone lines, quite than having to make use of particular person phones. PBX – The PBX telephone machine, or Private Department Alternate, are telephone programs that are designed in particular for corporate use in offices. Similarly Automated Attendants, Automated Name Distributors and CTI are the primary methods of phone in administrative center.