Nortel Meridian SL-1 Supplementary Manual page 90

7-10 Upgrading from SL-1 VLE/XL to Option 71
Shelf upgrades to Meridian 1 553-3001-253
26 Tag and disconnect cables from faceplate connectors of all QPC216
three-port extender packs in the QCA25 cabinet.
27 Tag and disconnect network loop cables from faceplate connectors of
each Network circuit pack.
28 Tag and disconnect cables from faceplates of SDI packs.
29 Disconnect and remove remaining cables from faceplate connectors in
QCA25 cabinet.
30 Remove all circuit packs from shelves in QCA25 cabinet.
Note: The 5/12 V CONV packs are required for the new network
shelves. The SDI packs are required if they are assigned in the
converted system. The remaining removed packs are no longer
required.
31 Remove the mounting screws securing the QSD13 and QSD16
Network shelves to the cabinet frame and remove the shelves.
32 Position a QSP32 Network shelf (left-hand mount) in the space
vacated by the QSD16 shelf directly above the left cooling unit
(Figure 7-1).
33 Position a QSP31 Network shelf (right-hand mount) in the space
vacated by the QSD13 shelf directly above the right cooling unit
(Figure 7-1).
Note: To ensure proper cooling, always install shelves starting at the
bottom of the cabinet and building upwards.
34 Position and mount remaining QSP32 and QSP31 Network shelves (if
provided) in spaces directly above previously mounted shelves.
35 From the front of each QSP32 shelf, plug in a QPC477-9 BTU in
connector located between slots 3 and 4, and a QPC477-10 BTU
between slots 2 and 3 (Figure 7-3).