Paradyne 4929 DSLAM Installation And User Manual

Contents

3. Cabling4929-A2-GN20-00 March 2005 3-7Connecting a Modem to the COM PortTo connect a modem to the COM port:Procedure1. Determine and procure the proper DCE cable type for your modem. The COMport requires an RJ45-type plug connector. The other connector depends onthe serial port on your modem. The connection requires an EIA-232Ecrossover (null modem) cable or adapter. See DB9 to RJ45 Adapter Pinouts inAppendix A, Connectors and Pin Assignments.2. Connect the modular plug connector of your cable to the COM port socket.3. Connect the other end of the cable or adapter to the serial port of yourmodem.Connecting to PowerThe 4900 Series DSLAM is powered by a nominal –48 VDC source. Dual powerfeeds are provided for redundancy. The terminal block accepts 18 to 14 AWG wire.The DC power terminal block on the DSLAM has five terminals: two positive, twonegative, and one ground. Only one positive terminal and one negative terminalpair need be connected for operational purposes. The second positive andnegative terminal pair may be connected to a backup DC power supply forredundancy. The ground terminal must be connected regardlessly. DO NOTOPERATE THE DSLAM WITHOUT A GROUND CONNECTION.To connect the DSLAM to power:Procedure1. Make sure that the DC power source wires are not powered (that is, the circuitbreakers or fuses are open at the source).2. Strip about 1/2 inch (13 mm) of insulation off the ends of the 18–14 AWG or0.75–2.5 mm 2 solid or stranded wires you will use for power.3. Loosen the screw above the center terminal on the pluggable DC terminalstrip included with your DSLAM.4. Insert your ground wire into the center terminal and tighten the screw.5. Attach the other end of the ground wire to an earth ground.6. Loosen the screws above the positive and negative terminals on one side ofthe terminal strip.7. Insert your negative DC power lead into the negative (–) terminal and thentighten the screw.8. Insert your positive DC power lead into the positive (+) terminal and thentighten the screw.9. Repeat Step 6 through Step 8 if you have a redundant power source.