OpenVox FB40 is a 4-port BRI/ISDN interface failover box. It can better protect the unpredictable problems happen to the Asterisk PBX. It will provide an effective way to backup the Asterisk PBX when undesirable changes are detected (often when Asterisk fails or power-off of the system). FB40 provides a reliable and flexible solution to Asterisk PBX. OpenVox FB40 is controlled through an Asterisk loadable module res_failover.so. This module keeps sending "running" signal to FB40 when Asterisk is running. Once Asterisk is down or system power is cut off, the module will not be able to send out the "running" signal to FB40 and thus FB40 will automatically switch to the standby server. FeaturesEasy installation; uses USB to connect computer or serverIndustry standard USB type B connectorUSB 2.0 and 1.1 compliantLow power consumption, takes power from USB busStandard length type A to type B cable providedSupports software watchdogSupports up to 4 ISDN BRI interfacesSupports multiple FB40 devices in one systemFully supports Asterisk (Version1.2/1.4/1.6)Small plastic enclosure: 285mm x 110mm x 34mm4 power supply indicator lightsApplicationsProvides an effective way to backup the Asterisk PBX when undesirable changes are detected (often when Asterisk fails or power-off of the system).