Nortel 1000E Maintenance Manual page 137

4
5
6
7
Removing daughterboards from the NTBK50 card
Because of the physical layout of the motherboards and daughterboards,
remove the NTAK20 before the NTAK93/NTBK51.
Procedure 30
Removing the NTAK20 and NTAK93/NTBK51 from the NTBK50 card
Step
1
Copyright © 2007, Nortel Networks
.
Replacing the NTAK79 or NTBK50 2.0 Mb PRI card 137
The LEDs on the front of the card change from green (enabled) to
red (disabled.) For this to happen, the DIS MSDL command must be
used, as in Step 1.
Hold the circuit card by the lock latches, unlock the latches, and
slide the circuit card out of the Media Gateway. If required, remove
any daughterboards that may be attached. See
"Removing the NTAK20 and NTAK93/NTBK51 from the NTBK50
card" (page 137).
On the replacement PRI circuit card, configure any switches and
install any daughterboards as required. Hold the card by the lock
latches and slide it into its assigned slot until it connects with the
backplane.
Enable the Clock Controller and the PRI in their corresponding
overlays:
LD 60
LD 60
The associated DCHI/DDCH is automatically enabled.
Check the tracking of the Clock Controller with the following overlay:
LD 60
If it is not tracking or is not locked, use the following commands to
track:
LD 60
Action
Starting at the two corners opposite the connector, gently lift each
corner out of the locking groove of the standoff.
Nortel Communication Server 1000
Communication Server 1000E Maintenance
NN43041-700 01.02 Standard
Release 5.0 20 June 2007
ENL CC 0
ENLL X
SCK 0
TRCK PCK/SCLK
—End—
Procedure 30