Specifications

112 Chapter 9
XMU+ Hardware Upgrades
Replacing Control Cards
Removal of the Control card may be required for some XMU+ upgrades. As well, older
XMU units can be upgraded to obtain all XMU+ functionality (excluding the
redundant power supply option) if a new Control card is installed. Control Cards
should always be removed and/or installed by a trained technician.
To remove the Control card
1. Back up configuration and messages.
2. Take the XMU+ offline and power down. See To take the XMU+ offline on page
107 and To power dow n th e XMU+ on page 108.
3. Loosen the two thumbscrews on either end of the Control card’s faceplate.
See Product Overview on page 4 for a detailed diagram of the Control card.
4. Pull the Control card straight out.
To install a new XMU
+
Control card
1. Take the XMU+ offline and power down. See To take the XMU+ offline on page
107 and To power dow n th e XMU+ on page 108.
2. Remove the old Control card. See To remove the Control card on page 112.
3. Line up the new Control card’s circuit board on the plastic rails in the chassis.
4. Slide the new Control card into place.
It may be necessary to align the handset and tape input in the front of the unit
while seating the card. When seating the card, there should be slight resistance.
5. Tighten the thumbscrews.
6. Bring the XMU+ back online. See To br ing the X MU+ online on page 108.
Once the XMU+ is powered up, it will automatically run a test of the memory
and display the available recording time.
7. Verify that the XMU+ displays the proper amount of recording time, as shown
in the chart on the next page. The amount of memory available is determined
by the memory modules installed on the Control card.
Memory Module Part Number... Number of Minutes...
48995 8
48996 16
48997 32
Caution...
Forcing the Control
card into place
could bend the
pins on the
connector.