Full MC55 details are available .

Also integrated is Motorola's Total Enterprise Access and Mobility (TEAM) Express client software, which gives the MC55 push-to-talk capability with other Motorola devices such as the CA50 VoIP-enabled wireless barcode scanner, TEAM VoIP WLAN-based smartphones, and even the company's broad array of two-way radios. (More details of the TEAM voice-over-WLAN capabilities are available at the Web site.)

Push-to-talk (PTT) offers some interesting possibilities for enterprise users, according to wireless analyst and NW blogger Craig Mathias. "PTT is going to become, I believe, a standard feature on essentially all handsets of all forms over time," he wrote last fall when . "It's convenient, it works well on IP-based networks... and it's a natural extension to social networking and enterprise Web 2.0 capabilities."

Both the WLAN and WLAN/cellular MC55 models are available now.