3 transparent bipolar interface connectors, Line build out settings – CANOGA PERKINS 2270 Fiber Optic Modem User Manual
Page 31
31
2270 Fiber Optic Modem
Table 3-I. Line Build Out Settings
Switch Positions for 4Bx
1
2
3
4
5
MODE OF
E1
T1
LEN0
LEN2
LEN1
OPERATION
E1
ON
OFF
ON
ON
ON
E1 CCITT
OFF
ON
OFF
ON
OFF
0-133 FT
DSX-1 OFF
ON
ON
OFF
ON
133-266 FT
ABAM OFF
ON
OFF
OFF
ON
266-399 FT
& PIC OFF
ON
ON
OFF
OFF
399-533 FT
OFF
ON
OFF
OFF
OFF
533-655 FT
CSU
OFF
ON
ON
ON
OFF
PART 68 OPT. A
OFF
ON
OFF
ON
OFF
T1C1.2
These interfaces are fully transparent to line codes such as B8ZS or HDB3. Three DIP switches
(3, 4 and 5) are provided for selecting various line buildout settings. Standard factory settings
are T1 at 0-133 feet for all three models. Two DIP switches (1 and 2) are provided to select
CCITT speed (2.048 Mhz X 3) or T1 speed (1.544 Mhz X 3).
Figure 3-3.
Transparent
Bipolar Interface
Connectors
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