2-2 DS-1 configuration
297-2521-106 Standard 23.01 March 2001
Figure 2-1
DTCI shelf configuration (front view)
* Optional
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The 25 card slots in the DTCI shelf are split into upper and lower sections.
This allows each populated slot to have one online module and one standby
module. The DTCI supports up to 10 NT6X50AB (or NT6X50AA) DS-1
cards (slots 1 through 5, upper and lower). DS-1 cards are equivalent to 20
DS-1 trunks. It is recommended that the DTCI be equipped with
NT6X50AB type DS-1 cards. This is because DS-1 cards can support 56
kbit/s and 64 kbit/s (clear and restricted) data rates.
Table 2-1 describes the printed circuit boards on the DTCI shelf.
Table 2-1
DTCI shelf description
Slot Abbreviation NT_PEC Description
01–05 DS1 6X50AB DS-1 interface. Up to five DS-1 cards
on each unit are supported. A minimum
of one card is required.
06–11 Filler 0X50AA Filler face plate
12 UP MX77AA Unified processor
13 Filler 0X50AA Filler panel
14 ETS AX78AA Enhanced time switch
—continued—
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