Mike's PBX Cookbook

NT8D01 Controller faceplate codes

The NT8D01 Controller faceplate has a two digit hexadecimal display with two modes: normal operation and power-on-reset/self-test. NT8D01 Controller faceplate

Normal operation

During normal operation the display alternately shows:

1. The Controller number (1-95) in hexadecimal.
2. The Controller tracking mode (port on which the Controller clock is tracking), indicated by decimal points. The possible tracking modes are:

C0 - Controller tracking to the network connected to port 0.
C1 - Controller tracking to the network connected to port 1.
C2 - Controller tracking to the network connected to port 2.
C3 - Controller tracking to the network connected to port 3.
CF - Controller is not tracking any network.

eg, Controller #1, with a superloop connected to port 0: display flashes between01 andC0.
Superloop (supl) and controller (xpe) assignments are printed and programmed in LD 32/LD 97.

Maintenance

If you suspect a bad loop, but the NT8D04 (superloop) is OK, try moving the CONT-4 back plane connector to one of the other ports. They are marked SL0, SL1, SL2 and SL3 - only possible with 1 Superloop/IPE. Re-enable the Superloop and XPEC (LD 32), and test.
Remember, controller cards are not hot swappable: always disable the superloop, and power off the IPE shelf before removing one.

See LD 32 for the following commands:

STAT sl- Get status of specified superloop
DISL sl- Disable specified superloop
DSXP x- Disable Controller x and all associated IPE cards
ENLL sl- Enable specified Superloop
ENXP x- Enable Controller x and associated IPE cards
XNTT sl- Do self-test of Network card for specified superloop
XPCT x- Do self-test on Controller x
XPEC (x)- Print data for one or all Controllers
SUPL (sl)- Print data for one or all superloops

Also see LD 30 for the following commands:

CPED l s - clear Peripheral Controller maintenance displays
RPED l s - read Peripheral Controller maintenance displays

The 16 most recent displayed codes, stay in memory and can be reviewed using LD 30: RPED l s.

Self-test codes

During the self-tests, the display quickly shows the self-tests listed below. If a test fails, the display shows the number of the failed test for 0.5 seconds before continuing the remaining tests. The self-test sequence is repeated until all tests pass, so a faulty card will cycle.

Controller self-test codes:

CodeDefinition
02A31 #1 external buffer test.
03A31 #1 internal context memory test, phase A.
04A31 #1 internal context memory test, phase B.
05A31 #1 internal TXVM memory test.
06A31 #1 configuration memory test.
07A31 #1 external FIFO test.
08A31 #2 external buffer test.
09A31 #2 internal context memory test, phase A.
0AA31 #2 internal context memory test, phase B.
0BA31 #2 internal TXVM memory test.
0CA31 #2 configuration memory test.
0DA31 #2 external FIFO test.
0Eperipheral side W72 loopback test using A31 #1.
0Fperipheral side W72 loopback test using A31 #2.
10R72 #1 N-P switching control memory test.
11R72 #1 320 x 8 NIVD buffer test.
12R72 #1 N-P quiet-code register test.
13R72 #1 P-N switching control memory test.
14R72 #1 640 x 8 XIVD buffer test.
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