Connecting to Power
Connecting a Modem to the COM Port
To connect a modem to the COM port:
1Determine and procure the proper DCE cable type for your modem. The COM port requires an
2Connect the modular plug connector of your cable to the COM port socket.
3Connect the other end of the cable or adapter to the serial port of your modem.
Connecting to Power
The 4900 Series DSLAM is powered by a nominal
The DC power terminal block on the DSLAM has five terminals: two positive, two negative, and one ground. Only one positive terminal and one negative terminal pair need be connected for operational purposes. The second positive and negative terminal pair may be connected to a backup DC power supply for redundancy. The ground terminal must be connected regardlessly. DO NOT OPERATE THE DSLAM WITHOUT A GROUND CONNECTION.
To connect the DSLAM to power:
1Make sure that the DC power source wires are not powered (that is, the circuit breakers or fuses are open at the source).
2Strip about 1/2 inch (13 mm) of insulation off the ends of the
3Loosen the screw above the center terminal on the DC terminal strip on the face of your DSLAM.
4Insert your ground wire into the center terminal and tighten the screw.
5Attach the other end of the ground wire to an earth ground.
6Loosen the screws above the positive and negative terminals on one side of the terminal strip.
7Insert your negative DC power lead into the negative
8Insert your positive DC power lead into the positive (+) terminal and then tighten the screw.
9Repeat Step 6 through Step 8 if you have a redundant power source.
| 4929 DSLAM Installation and User’s Guide | 31 |
