The technology, deployed by Metricom Inc., worked as a wireless mesh network: packets were forwarded by small repeaters (typically mounted on streetlights, for the use of which Metricom negotiated agreements with municipal governments) and might "bounce" among several such units along the path between an end-user's modem and a wired internet access point; hence the name of the service. The wireless ISP service was an outgrowth of technology Metricom had developed to facilitate remote meter reading for utility companies. It was originally inspired by amateur packet radio, but differed from this technology in many respects: for instance, Ricochet used spread spectrum (FHSS) technology in the low-power "license-free" 900 MHz ISM band of the RF spectrum. In addition to the resistance to eavesdropping offered by FHSS, modems offered built-in encryption, but this was not turned on by default.