A trio of recent wireless LAN vendor acquisitions is evidence that the industry is still in creative ferment.

Aruba Networks, one of the few remaining independent WLAN switch pioneers, has acquired the wireless intrusion prevention/detection product line of Network Chemistry. Bluesocket snapped up Pingtel, an IP PBX vendor, to extend its Wi-Fi services into VoIP and integrate them with cellular. And earlier this month, client wireless mesh vendor PacketHop was bought by its founder, SRI International, a non-profit R&D outfit.

Aruba gains the RFprotect and BlueScanner wireless security product lines from Network Chemistry. The former is an intrusion detection/prevention system for WLANs; the latter is an application for detecting Bluetooth security threats.

RFprotect is based on a rackmounted appliance with software and sensors that detect devices such as access points and wireless-equipped laptops that attach to the network. Via a downloaded agent, RFprotect creates a "fingerprint" of each device’s radio signature, then compares this with a database of such fingerprints to identify the wireless device, and determine if it represents a threat. Network Chemistry updated the system earlier this year.

Aruba plans to integrate the Network Chemistry software into its existing line of wireless controllers, applications and access points.

As with other WLAN vendors, Aruba has had some intrusion-detection capabilities in its core software. But third-party vendors such as AirDefense, AirMagnet and AirTight (sometimes dubbed the “Air Brothers”) and Network Chemistry have carved out successful businesses with increasingly sophisticated systems for scanning radio frequencies, and identifying, locating and containing threats. The strength of such offerings was underlined in June, when VeriSign launched a wireless IDS managed service, based on AirMagnet’s products.

No financial details were disclosed. It’s Aruba’s first acquisition since going public earlier this year.

In other business news, Aruba announced a joint venture with Alcatel-Lucent SA to deliver hardware and software that will add secure WLAN switching to future Alcatel-Lucent products. Another goal of the joint venture is to beef up security for Alcatel-Lucent’s fixed-mobile convergence projects, but the vendors were vague on details.