348 3Com® VCX V7111 VoIP Gateway User GuideV7111 Gateway Line TestingThe V7111 gateway features a mechanism that performs tests on the telephone linesconnected to FXS and FXO ports. These tests provide various line measurements.The line testing mechanism is performed on channel 1 and therefore, disconnectsany call that is in progress on this channel. Therefore, it is recommended to performthe testing only when there are no calls in progress.The following line tests are available on FXS gateways: Hardware revision number. Temperature (above or below limit, only if a thermometer is installed). Hook state. Coefficients checksum. Message waiting indication status. Ring state. Reversal polarity state. Line current (only on port 0). Line voltage between TIP and RING (only on port 0). 3.3 V reading (only on port 0). Ring voltage (only on port 0). Long line current (only on port 0).The following line tests are available on FXO gateways: Hardware revision number. Hook state. Reversal polarity state.To perform analog line testing using the embedded Web server, take these steps:1 Click the Analog Line Testing submenu (Status & Diagnostics menu > Analog LineTesting); the Analog Line Testing confirmation box is displayed.
