43 count of layer 3 messages from system containing invalid mandatory IE(s)
44 count of layer 3 messages from system with IE(s) out of order
45 count of layer 3 messages from system containing repeated IE(s)
46 count of layer 3 messages from far end with an invalid call reference length
47 count of layer 3 messages from system with an invalid call reference flag value of 0
48 count of layer 3 messages from system with an invalid call reference flag value of 1
49 count of layer 3 messages from system with an invalid global call reference
50 count of unexpected layer 3 messages received from the far end
51 count of unexpected layer 3 messages received from the system
52 count of unexpected layer 3 timer expirations
53 count of protocol messages received when D-channel is not in service or waiting for
a Service
Acknowledge message
Replace the DCHI
Caution:
Firmly touch the metal frame of the cabinet to discharge static electricity from your body
before handling circuit packs.
Replacing the DCHI
1. Disable the D-channel using:
LD 96
DIS DCH N
2. Disable the asynchronous port on the DCHI card (if equipped) using:
LD 48
DIS ESDI N
3. Set the ENB/DIS switch to DIS.
4. Disconnect cables on DCHI faceplate.
5. Remove the DCHI from the shelf.
6. Make sure that the new DCHI card switch settings are the same as the faulty DCHI
card. See Avaya ISDN Primary Rate Interface Installation and Commissioning
(NN43001-301) and Avaya Circuit Card Reference (NN43001-311) for switch-
setting information.
Replace the DCHI
ISDN Primary Rate Interface Maintenance November 2011 75
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