A telephone exchanging apparatus 30 comprises a joined terminal table 341, a joined terminal table operating portion 352, and a reception side designating portion 355. The joined terminal table 341 stores terminal identification information that identifies a telephone terminal 40 that will join a conference....http://www.google.fr/patents/US7039019?utm_source=gb-gplus-shareBrevet US7039019 - Telephone exchanging apparatus and telephone system
Telephone exchanging apparatus and telephone system
