The Wireless Internet Service Providers Association (WISPA) has ratified a new CALEA intercept standard for wireless ISPs. The new standard makes it possible for ISPs to comply with the lawful intercept requirements of CALEA without requiring a trusted third party (TTP) to deliver intercepts to law enforcement.

The new WISPA standard takes advantage of existing Open Source software such as tcpdump and OpenCALEA to intercept network traffic moving to and from a target. Capture files are stored on a server in PCAP format so law enforcement can pull the intercept files on demand. This store-and-forward approach is preferred by law enforcement because it does not allow packet loss, and it does not require law enforcement to have the facilities required to receive streaming intercepts.