Nortel BCM50 Installation And Maintenance Manual page 49

• OA&M port (port 0)
An RJ-45 jack used to connect a computer running administration software, such as Element
Manager, to the BCM50a Main Unit.
• LAN port (port 1)
An RJ-45 jack used to connect the customer LAN to the BCM50a Main Unit.
• Expansion/LAN ports (ports 2 and 3)
Two RJ-45 jacks used to connect the BCM50 Expansion Units to the BCM50a Main Unit.
The Expansion ports can also provide connections to the ethernet switch internal to the
BCM50a Main Unit. If the BCM50 system does not have BCM50 Expansion Units connected
to these ports, you can use them to connect additional devices to the LAN.
• WAN port
An RJ-11 jack used to connect the BCM50a Main Unit to the ADSL line provided by your
internet service provider (ISP).
• Additional LAN ports
Three RJ-45 jacks provide connections to the ethernet switch in the BCM50a Main Unit. You
can use these ports to connect additional devices to the LAN.
• Music source port
A phono jack used to connect a music source to the BCM50a Main Unit.
If you use this port, the music source connections on the telephony connector are disabled.
• USB port
A USB 1.1 compatible port used to connect a USB storage device or the data interface for an
uninterruptable power supply (UPS) to the BCM50a Main Unit. The data interface for the UPS
allows the BCM50 to monitor and control the UPS functions. To connect both a USB storage
device and UPS data interface, a USB hub is required.
Note: The USB storage device must be formatted for the FAT32 file system. If necessary,
reformat the USB storage device by plugging it into your computer's USB port, right-clicking
on the USB device icon, and selecting FAT32 reformatting. This will destroy any data you had
on the USB.
• Telephony connector
An RJ-21 port used to connect telephony devices to the BCM50a Main Unit. Refer to
"Telephony connector" on page 57
Warning: External equipment connected to the auxiliary ringer, page relay, page output,
and music-on-hold interfaces must use safety extra low voltage (SELV).
All four interfaces are SELV and the external equipment connected to these interfaces
must be SELV. If these interfaces are not SELV, you must use external line isolation units
(LIU).
for more information.
BCM50 Main Units
Introduction to the BCM50 hardware
49