The LAN Cable must pass two times (two rounds) through the Ferrite Core as below. (Ferrite Coreis attached with VOIPDB-C1)9. Refer to the SL1100 Programming Manual for detailed programming instructions.The VoIP feature requires system configuration.For the details of setting and operation, refer to the SL1100 Features & Specifications Manual(separate issue).4.1.4 LED IndicationLED indications for the IP4WW-VOIPDB-C1 are listed Table 2-19 VOIPDB LED Indications on thispage. Each LED is listed with its associated function and operational status.Table 2-19 VOIPDB LED IndicationsLED Function LED Status Operation statusACT Link activity or data transmission andreception.On Green LED lights when link up is completed. LED flashwhen data is transmitting or receiving.LINK1000 1000Base-T link speed indicator On Yellow Lights up when 1000Base-T link up.VOIPDB-C1 board (CN1)Ferrite CoreVOIPto HUBLAN Cable30 - 50 mm(1.181″ - 1.967″)Pass 2 times< Bottom View >Figure 2-85 Connecting a LAN CableVOIPDB-C1boardLINK10LINK100LINK1000ACT< Bottom View >Figure 2-86 Location of LEDsISSUE 1.0 SL1100Hardware Manual 2-55