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Signalling interface
Physical description
United Kingdom
United Kingdom
United Kingdom
United Kingdom
United Kingdom
United Kingdom
Trunk signalling messages are three bytes in length. The messages are
transmitted in channel zero of the DS-30X in A10 format.
Configuration information for the NT5K18 Exchange Line Trunk Card is
downloaded from the CPU automatically during power-up or manually by
commands from maintenance programs.
A physical description of the NT5K18 Exchange Line trunk card is given
below.
measurements
Each NT5K18 Exchange Line trunk card measures as follows:
He ig ht:
De pth:
Connections
The NT5K18 Exchange Line trunk card has eight units. Each trunk unit on
the card connects to the backplane through an 80-pin connector. The
backplane is cabled to the input/output (I/O) panel, and the I/O panel is
cabled to the cross-connect terminal. At the cross-connect terminal, each
unit connects to external apparatus by A and B leads. For detailed
termination and cross-connect information, see System installation
procedures (553—3001—210).
Self-test
When the card is installed, the red Light Emitting Diode (LED) on the
faceplate flashes as the self-test runs. If the self-test completes
successfully, the card is automatically enabled (if it has been configured in
software) and the LED goes out. If the self-test fails, the LED will remain
lit. The LED will also remain lit if one or more units on the card become
disabled while the card is operating.
NT5K18 Exchange Line Trunk Card 2-3
318 mm (12. 5 i n. )
254 mm (10 in .)
UK Trunk cards description 553-3001-173
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