3Com V3000 ANALOG, Installation Manual

Page: 105 / 252

Connecting Cards and Devices 105
Connecting Cards
and Devices
After you configure and test the NBX system, you can add optional cards
and attach optional devices such as Music On Hold.
Connecting Analog
Line Cards
You can install cards with the power on to the chassis. To connect and
configure an NBX Analog Line Card:
1 Remove the blank faceplate from one of the slots.
2 Verify that the edges of the card ride in the chassis guide slots, and then
slide the card in until you feel slight resistance. Press firmly on both sides
of the front of the card until you feel it seat in the connector, and then
tighten the two knurled knobs.
If you cannot seat the card with light pressure, remove it and check for
obstructions.
3 After you seat the card, wait at least 2 minutes for the card to initialize.
4 Use the NBX Auto Discover feature to configure the card. The Auto
Discover feature finds each line card port and assigns extensions. For
more information, see
“Using Auto Discover for Initial System
Configuration” on page 111 .
3Com recommends that you install the cards in MAC address order. This
practice makes it easier to diagnose and troubleshoot problems.
Mapping Line Card Ports to Telephone Lines
You can run the system using the default configuration, but to have
complete control over telephone operations, you need to know which
telephone line is assigned to which analog line port so that you can map
CO telephone lines to telephones and manage lines for maximum
performance. Use the NBX NetSet utility to quickly reassign extensions.
When you connect the telephone lines, the order in which the telephone
lines deliver calls matches the order of Line Card port extensions. For
example, connect the line that rings first to the port with the lowest
numbered extension, connect the next telephone line to next-lowest
extension, and so forth. Extension numbers for Line Card ports are
assigned based on the first unused extension number. Therefore, the
extensions vary from system to system.
Line Card ports are labeled on the front panel. The first connector, labeled
PFT (Power Fail Transfer), accepts a standard POTS (2500 touch-tone
series compatible) telephone. If there is a power failure, this port