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2-8 DS-1 configuration
Figure 2-2
NCTE block diagram
Cabling distance
The following conditions apply to the cabling distance from the front panel
of the DMS-250 switch to the LD-1:
The following conditions apply to the cabling distance from the DSX-1 to
the LD-1:
Switch settings for distance
Table 2-4 lists the DMS-250 switch settings based on distance.
297-2521-106 Standard 23.01 March 2001
I/O panel
DMS-250
switch
655 ft (223.224 m)
maximum
750 ft (255.6 m)
LD-1—the demarcation point between CPE and the public network
DSX-1—the standard signal quality reference point
Cabling distance is limited to approximately 750 feet (255.6 m) on
shielded 22-gauge cable (NT-ABAY, WECO-ABAM, or equivalent).
Cabling consists of approximately 655 feet (223.2 m) of the same cable
to a DSX-1.
Cabling may vary within a 95-feet (32.4 m) range, depending on the
manufacturer of the NCTE and whether the NCTE is equipped with a
transmit equalizer.
Reduce the cabling distance to the LD-1 or DSX-1 by about 27 feet (9.2
m) when measured from the input/output (I/O) filter assembly, PN
P0643763, located at the bulkhead (I/O panel) of the DMS-250 switch
cabinet.
LD-1
DSX-1
NCTE
95 ft (32.376 m)
maximum
CPE
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