Nortel Networks BCM50 - Manual (Page 178)

178 Chapter 21 Replacing a main unit
NN40020-302
To connect the cables
1 Insert the power supply retention clip into the new main unit.
2 Rotate the power supply retention clip so that the power supply jack is clear.
3 Connect the power supply cord to the main unit.
4 Rotate the power supply retention clip to lock the power supply cord in place.
5 Connect to AC power source:
a If the system has a UPS, connect the USB cable to the USB port on the main unit and plug
the UPS power cord into the AC power source (wall outlet).
b If the system has no UPS, plug the power supply cable into the AC power source (wall
outlet).
6 If the system uses the external Music Source port, connect the music source cable to the Music
Source port on the main unit.
7 Connect the expansion cables or LAN cables to the expansion ports on the main unit. For
expansion cables, make sure you connect the cables to the expansion ports from which you
removed them to ensure the same line and extension numbering.
8 If the main unit is a BCM50a or BCM50e, connect the Ethernet cable or ADSL line to the
WAN port and the Ethernet cables to the Router card LAN ports.
9 Connect the Ethernet cable to the LAN port.
10 Connect the 25-pair cable to the RJ-21 telephony connector on the front of the main unit.
11 Secure the RJ-21 connector to the BCM50 main unit.
If you use a straight RJ-21 connector, use the two screws on the sides of the connector to
secure it.
If you use a right-angle RJ-21 connector, use the screw on the left side of the connector to
secure the left side of the connector. To secure the right side of the connector, use a cable tie to
fasten the 25-pair cable to the anchor on the BCM50 main unit.
12 Continue with the procedure To return the system to operation on page 170.
Warning: Leakage currents
You must connect the power cord to a grounded outlet before connecting the
telephony and data networking cables to the system.