22 3Com VCX V7111 VoIP SIP Gateways User ManualThis feature provides a wired phone connection to any PSTN or PBX FXS port, upon power-down conditions. When the power outage occurs, the phone that is connected to the LifeLine port, on pins 2 and 3, is wired to the PSTN or PBX FXS wires on pins 1 and 4 on thesame connector. Therefore, you can use the phone even when the Gateway is not powered-on. To use this function, you must use a splitter that connects pins 1 and 4 to another sourceof an FXS port, and pins 2 and 3 to the POTS phone.The pinout of the Life Line RJ-11 phone connector is as follows: 1 = Life Line TIP 2 = TIP 3 = RING 4 = Life Line RINGSee Figure 9 for the RJ-11 connector pinout.Figure 9 RJ-11 Connector and Life Line Pinout for VCX V7111 FXS Gateways1 2 3 4 1 -2 -3 -4 -Life Line TipRJ-11 Connector and Life Line PinoutLife Line RingTipRingFront Panel LED IndicatorsThe VCX V7111 front panel LEDs indicate the Ethernet LAN status, Data (RTP) activity, andstate of the Gateway’s ports.Figure 10 Front Panel LED IndicatorsTable 4 Figure 10 Legend1 Restart buttonFunctionality of the Front Panel LEDs is explained in Table 5.1
