User manual

29
2270 Fiber Optic Modem
Table 3-G. Line Build Out Settings
Switch Positions for 4Bx
12345
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 3-2.
Transparent
Bipolar Interface
Connectors