Telephone system, and main unit and terminal registration method therefor

A main unit which is provided for a telephone system including a plurality of telephone terminals configured to make telephone communication via a packet network and receives a login request from each of the telephone terminals via the packet network, comprising:

• an authentication processing unit which performs login authentication processing for each of the telephone terminals by media access control (MAC) address authentication;
• and
• a mode specification unit which receives specification of a plural terminal registration mode, wherein
• the MAC address authentication is an authentication system which refuses logins from telephone terminals differing in MAC address from a telephone terminal that has been allowed to log in firstly even if the logins are made by the same extension numbers,
• the plural terminal registration mode is a mode to exclusively allow the simultaneous login by the same extension numbers from a plurality of telephone terminals having different MAC addresses;
• and
• the authentication processing unit gives priority over the plural terminal registration mode higher than the MAC address authentication and makes the MAC address authentication void in the plural terminal registration mode.

A terminal registration method for a device which receives login requests from a plurality of telephone terminals configured to make telephone communication via a packet network by a media access control (MAC) address authentication, wherein

• the device is configured to specify a plural terminal registration mode;
• the MAC address authentication is an authentication system which refuses logins from telephone terminals differing in MAC address from a telephone terminal that has been allowed to log in firstly even if the logins are made by the same extension numbers,
• the plural terminal registration mode is a mode to exclusively allow the simultaneous login with the same extension numbers from a plurality of telephone terminals having different MAC addresses;
• and
• the device gives priority over the plural terminal registration mode higher than the MAC address authentication and makes the MAC address authentication void in the plural terminal registration mode.