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 is tracking to the network connected to port 0.
C1 - Controller is tracking to the network connected to port 1.
C2 - Controller is tracking to the network connected to port 2.
C3 - Controller is 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 alternates01 andC0.
Superloop (SUPL) and controller (XPE) assignments are printed and programmed in LD 97 (admin),
or printed and STATed in LD 32 (maintenance). See below...

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:

#Definition
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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