Nortel Meridian 1 Replacement Manual page 291

6 Disable the inactive IODU/C:
LD 137
STAT
DIS CMDU x
DIS IOP x
Perform the following steps on the inactive Core.
7 Set the ENB/DIS switch on the IODU/C with the faulty Security Device
to DIS.
8 Unhook the locking devices and remove the IODU/C.
9 Remove the round 1/2" diameter IODU/C Security Device from the
black round Security Device holder on the top right corner of the
IODU/C card.
10 Locate the round 1/2" diameter IODU/C replacement Security Device.
11 Make sure the 8-digit code on the Keycode diskette matches the 8-digit
code on the replacement Security Device.
12 With the Nortel side facing upward, slide the replacement Security
Device between the security device holder and the holder clip. Do not
bend the clip more than necessary when inserting the Security Device.
Ensure that the Security Device is securely in place.
13 Reinsert the IODU/C into the following slots:
— For NT5D21 Core/Net Modules, insert the IODU/C in slots 17,18,
and 19.
14 Lock the locking devices by pushing them gently towards the faceplate.
Set the ENB/DIS switch to ENB.
A blinking letter "E" and number "5" displayed indicates that a failure
occurred. In that case, reseat the Security Device in its holder and reinsert
the card.
15 Enable the IODU/C in LD 137:
STAT
ENL CMDU x
ENL IOP x
Replacing equipment
to load the program
to find the status of the IODU/Cs
to disable the CMDU part of the inactive IODU/C x
to disable the IOP part of the inactive IODU/C x
to see the status of the IODU/Cs
to enable the CMDU part of IODU/C x
to enable the IOP part of IODU/C x
Page 291 of 362
Hardware replacement