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Installation
Table 2-1
Option Application Notes — Switchbank S13, CSU
Characteristics (Continued)
Option
Selection
DS-1 Line
LBO
Build-Out (LBO)/
DSX-1
Pre-equalization
Pre-
equalization
* Factory default selection.
Switch
Position
S13-5
All Off* =
These switches control LBO when
S13-6
0 dB
a DS-1 line interface is selected at
S13-7
S13-4. Set all Off for 0 dB manual
S13-5 On =
S13-8
LBO. Set 5, 6, or 7 On for the spec-
-7.5 dB
ified manual LBO. Set 8 On for au-
S13-6 On =
tomatic LBO. Set only one switch
-15 dB
On.
S13-7 On =
Caution:
-22.5 dB
Do not enable automatic LBO for
S13-8 On =
both DSUs in a pair connected
Auto LBO
back-to-back. Do not enable auto-
matic LBO when the DSU is con-
nected to a DS1 Interface
Connector (Smart Jack): use man-
ual LBO with 0 dB attenuation.
S13-5
All Off* =
These switches control Pre-equal-
S13-6
0-133 ft
ization when a DSX-1 line inter-
S13-7
face is selected at S13-4.
S13-5 On =
S13-8
133 -266 ft
Pre-equalization matches transmit-
ter to network gain characteristics
S13-6 On =
for DSX-1. Select the lowest value
266 -399 ft
that equals or exceeds the distance
S13-7 On =
between units.
399 -533 ft
S13-8 On =
533 -655 ft
2-5
Description
GDC 048R154-000
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