BOSTON--Sylantro Systems is taking its VoIP feature servers into the wireless world, the company said today. Its latest release of Sylantro Synergy, 4.1, includes a wireless virtual PBX that enables wireless service providers to target the enterprise market.

Sylantro has already signed with Nokia as an OEM partner, CEO and President Pete Bonee told a VON press briefing. The deal will be formally announced next week and is the first of what is expected to be multiple such deals, he said.

The move by Sylantro is well timed, said Joe McGarvey, analyst with Current Analysis.

“Wireless operators want to go after the enterprise market,” he said. “This fits right in that sweet spot.”

The Wireless Virtual PBX integrates with a mobile switching center (MSC) or gateway MSC and enables PBX features to be incorporated into a mobile handset, said Ron Raffensperger, senior vice president of marketing for Sylantro. That handset then operates as an extension of the corporate network, both in terms of making and receiving calls and activating features such as call park, transfer or pickup. A user profile is created and used to indicate whether to terminate calls to a mobile phone or a fixed-line phone and can be changed or updated through a Web portal. The mobile network determines, based on the call origination, whether to treat a call as an IP Centrex call. When the profile is activated, calls to the user’s extension are routed to the mobile phone and identified as a work-related call, he said.

Sylantro also demonstrated a dual-mode Wi-Fi/wireless phone that is SIP-based. It enables a seamless handoff from cellular network to Wi-Fi, Raffensperger said. When the phone detects a Wi-Fi signal, it first sets up that leg of the call, then hands the call to the Wi-Fi network.

That application is particularly of interest to MVNOs and other service providers that don’t have wireless spectrum, said Frank Salm, senior marketing director. Many MVNOs don’t have access to their host companies’ home location registers, and this service would allow them to attract and keep customers without paying for minutes on the host network.