Motorola has signed a deal allowing it to include Internet voice communication software developed by VocalTec, of Northvale, n.j., with its Power Class 28.8 desktop modems.

The VocalTec software, called Internet Phone, allows pc users to establish voice communications over the Internet for the price of a local call.

The system is somewhat limited compared with traditional phone systems, since only one speaker can talk at a time.

This is because the Internet permits data transfer to take place in only one direction at any given time.

No advertising has been developed which addresses the VocalTec software specifically, but Ray Wright, director of marketing for Motorola’s modem products, says it is likely future advertising, developed by Motorola’s u.s. agency, McCann-Erickson, will.

‘It just broke so quickly, and it’s so new,’ Wright says.

For consumers anxious to thumb their noses at the long-distance telephone companies without buying a new modem, the software is available directly from VocalTec over the Net for US$59.

Consumers can download a time-limited trial copy of the Internet Phone software from a VocalTec World Wide Web site, but will have to buy a numeric ‘key’ from the company, sent via e-mail, before they can use it regularly.

The VocalTec Web address is http://www.vocaltec.com.