Issue 1 1 GS-U2S OPERATING INSTRUCTIONS
Contents
1. GS U2S OPERATING INSTRUCTIONS POWER This equipment can be powered from an external 9V DC supply or from internal batteries Battery requirement is for 2 AA cells The GS U2S may not be powered from the ISDN line If an external supply is plugged in and present the equipment will operate from the external supply if it fails then the batteries will take over automatically without losing the line To turn the GS U2S on move the power switch to the ON position The power on LED adjacent to the power switch will light CONNECTION TO ISDN LINE U BUS An open ended RJ45 lead is supplied with the equipment The RJ45 should be plugged into the connector marked U BUS and the wires at the open end should be connected to the incoming ISDN line Alternatively a RJ11 connector may be plugged into the RJ45 U BUS socket on the GS U2S In cases where the ISDN line is supplied as a pair of wires the wires may be connected directly to the GS U2S using the green terminal blocks adjacent to the U BUS RJ45 connector To make the connection insert the wire in the hole whilst pressing the orange tab with a screwdriver or pen ISDN S BUS CONNECTION The ISDN S BUS is presented on a pair of standard RJ45 connectors The switch adjacent to the S BUS connectors selects the value of termination resistor connected to the S BUS The options are OFF 50Ohm or 100Ohm OPERATION Once the U BUS and S BUS connections have been made the GS U2S may be powered on T2. he power on LED should illuminate immediately The status LED indicates the status of the U BUS and S BUS connections Status LED Flashing quickly or off U BUS connection fault Flashing slowly S BUS connection fault On S BUS and U BUS OK Issue 1 1 Connectors S BUS RJ45 Pinl NIC Pn2 N C Pin3 S BUS RX Pin4 S BUS TX Pins S BUS TX Pin6 S BUS RX Pn7 N C Pn8 N C U BUS RJ45 Pinl N C Pn2 N C Pn3 NIC Pin4 U BUS Pin U BUS Pn6 N C Pn7 N C Pn8 NIC DCIN 2 5mm Plug Centre DC Positive Sleeve DC Negative Issue 1
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