Oki Electric Industry Co. on Thursday unveiled two new Internet protocol telephony systems to be offered in Japan and abroad, beginning with China, in December.

Oki Electric said it aims to sell 100,000 units of the new telephone systems IPstage MX and IPstage SX in Japan and overseas within three years.

The telephone systems are best suited for offices with less than 100 employees, Oki Electric said. The IPstage MX targets offices with 100 extensions or less, while the IPstage SX targets those with 30 or less.