16
2-WIRE IDSL LINE DRIVER RACK CARDS
Switches S2-1 through S2-4: Control Port Address— LSD
Use Switches S2-1 through S2-4 to set the least-significant digit of the ME0001C
control port address. For example, using Table 3-6, if the desired address is “63”,
the “3” is the least-significant digit in the address. Set Switches S2-1, S2-2, S2-3, and
S2-4 to OFF, OFF, ON, ON.
Switches S2-5 through S2-7: Control Port Address—MSD
Use Switches S2-5 through S2-7 to set the most-significant digit of the ME0001C’s
control port address. For example, using Table 3-6, if the desired address is “62,”
the “6” is the most-significant digit in the address. Set Switches S2-5, S2-6, and S2-7
to ON, OFF, OFF.
Switch S2-8: Reserved for Factory Use
Switch S2-8 is reserved for factory use and must remain in the ON position.
3.1.4 C
ONFIGURATION
S
WITCH
S5
The configuration switches on S5 allow you to specify the data rate, 2-wire/4-wire
selection, and enable or disable loopback diagnostics. Default settings of S5 are
shown in Table 3-7.
Table 3-7. S5 summary.
Position
Function
Factory Default
S5-1
Data Rate
Off
S5-2
2-Wire/4-Wire
Off
2-wire
S5-3
Enable LAL or RDL from DTE
On
Enable
S5-4
Enable front-panel switches
Off
Disable
Switch S5-1: Data Rate
Use Switch S5-1 with Switches S1-1 and S1-2 to enable additional data rates.
Table 3-2 shows all possible bit rate settings for Switches S1-1, S1-2, and S5-1.
Switch S5-2: 2-Wire/4-Wire
Use Switch S5-2 to configure 2-wire or 4-wire operation.
