User guide

Table Of Contents
Routine maintenance
135
Adding expansion units
You can add up to two expansion units to the system.
A single expansion unit is shipped with an uplink card, an
uplink cable, and a Y-ac power cable.
To add two expansion units, you require a dual uplink
card kit. The kit includes a dual uplink card, and the
uplink cables and power cables required to connect two
expansion units (see Figure 19 (page 137)).
If you are upgrading the system with a 24-port
expansion unit, you must first upgrade the system
to Release 4.0 version software or higher. See
Upgrading the system (p. 133). After upgrading the
system software, power down the system, connect
the new hardware, and reboot the system.
1. Power down the controller and disconnect all connec-
tions to the public telecommunications network.
2. Attach an anti-static strap.
3. Remove the top cover of the controller.
4. Install the Uplink card or Dual Uplink card (see Figure
18 (page 136)) on the two standoffs.
5. Secure the card with the supplied screws.