TDM and VOIP

The Associated Press/NEW YORK
MAR. 24 10:22 A.M. ET

Communications equipment makers Nortel Networks Corp. and Sierra Wireless Inc. said on Friday they made the first over-the-air test calls using a next-generation wireless technology called EV-DO (Evolution-Data Optimized).

The technology, which is being pushed out in the U.S. by Sprint Nextel Corp. and Verizon Communications Inc., is expected to deliver higher-speed wireless service which will allow for push-to-talk, push-to-video, voice-over-Internet-protocol, and interactive gaming wireless functions.

Shares of Nortel, which have traded between $2.26 and $3.60 over the last year, were up 14 cents, or 5 percent, at $2.95 in morning trading on the New York Stock Exchange. Shares of Sierra rose 3 cents to $11.08 on the Nasdaq