Zultys Technologies has a new wireless IP phone aimed at SIP-based IP PBX users and other gear based on the VoIP standard.

The WIP 2 handset is an 802.11b-based IP telephone that features push-to-talk, instant messaging and other applications that could appeal to mobile workers in a campus or warehouse environment with widespread wireless LAN coverage, the company said.

"Customers have been asking for a wireless phone for over a year," said Zultys' CEO Iain Milnes. The construction, medical and retail warehousing industries are expected to be the main customers.

The phone uses a miniature, real-time version of Linux and can run such applications as IM, where messages are typed with the number pad, similar to text messaging. The device also supports presence, where users can register their availability on the network via the phone. A push-to-talk feature allowing instant connections between WIP 2 users is included - although they require Zultys' IP PBXs on the back end.

The phone has two line appearances, allowing it to handle two incoming calls at once, as well as support for three-way conferencing. A speakerphone also is built in. The phone comes with a cradle that can be used to recharge the device, which provides up to four hours for continuous talk and 12 hours for standby time on a charge.

The phone supports 802.1p for packet prioritization, allowing WIP 2 VoIP traffic to gain priority over other data packet types once the signal hits the wired LAN. However, it does not support any type of "in-the-air" QoS, where 802.11 radio signals are prioritised. The phone encrypts Real time Transport Protocol (RTP) streams with 128-bit Advanced Encryption Standard security.

Pricing for the WIP 2 phone is not set, but users should expect to pay about $300 to $400 for the device, which is the cost for Zultys' higher-end wired IP phones. It will be available in November.