SIC-1VT1 49If the remote device has 120-ohm interface, it is needed to use a75-ohm-to-120-ohm adapter or use a 120-ohm cable.2 When the E1 cable is a 120-ohm balanced twisted pair cable:■ Directly connect the RJ-45 connector of the cable to the RJ-45 port of theremote equipment, if there is no need to extend the E1 cable, or■ Connect the RJ-45 connector of the cable to the network connector and theother end of the network connector to the network equipment through a120-ohm E1 trunk cable, if cable extension is needed.Figure 44 Extending an E1 120-ohm balanced twisted pair cableStep 4: Check the status of LINK LED on the SIC-1VE1 panel: ON means the link isconnected and OFF means the link is not connected. In the latter case, check theline.SIC-1VT1Introduction 1-port T1 voice interface card (SIC-1VT1) can handle dense voice signals in VoIPsystem. It provides a CT1/PRI/R2 port, allowing the access of 23 channels of voicesignals.n ■ When purchasing a SIC-1VT1 interface card, users should purchase a VCPMand configure a VPM based on voice traffic.■ No VCPM is required, but only a VPM needs to be installed on the main boardwhen MSR 20-1x series routers need to be equipped with a SIC-1VT1 interfacecard.■ VCPM and VPM need to be installed on the main board when MSR 30 seriesrouters need to be equipped with a SIC-1VT1 interface card.■ VCPM and VPM need to be installed on the MSCA card when MSR 50 seriesrouters need to be equipped with a SIC-1VT1 interface card.Interface AttributesRouterNetworkdevices suchas DDND B-15Network interface connectorR J-4 5 R J-4 51 20 -o hm b a la nced tw iste d pa ir 120-ohm E1 trunk cableTable 23 Interface Attributes of the SIC-1T1-FAttribute DescriptionConnector RJ45Number of connector 1
