Initial Startup and Configuration
3-10
7975-A2-GB20-40
December 1998
Table 3-3 lists Switchpack S2 definitions.
Table 3-3. Switchpack S2 Definitions
Switch # . . .
Allows you to . . .
Default in Bold
1 Control whether the unit is an LTU or an NTU.
OFF = NTU
ON = LTU
2 Control enabling and disabling of the AutoRate capability.
OFF = AutoRate Enabled
ON = AutoRate Disabled
3, 4, 5 Select one of eight preset DSL line rates (refer to Table 3-4).
All OFF = 2064 (1040 for 1 Mbps units )
6, 7 Not used
8 Emergency Use Only – The 7975 has two banks of flash memory
used to hold executable firmware. This switch allows you to switch
between the two versions of firmware. This switch is independent from
the position of Switch 1 on Switchpack S1 (switchpack enable/disable).
OFF = Current Firmware
ON = Previous Firmware
Use Table 3-4 to set the DSL Line Rate. Defaults are shown in bold.
Table 3-4. DSL Line Rate, Switches 3–5 on Switchpack S2
Switch Position
5 4 3
DSL Line Rate
OFF OFF ON 144 kbps
OFF ON OFF 272 kbps
OFF ON ON 400 kbps
ON OFF OFF 528 kbps
ON OFF ON 784 kbps
ON ON OFF 1040 kbps
ON ON ON 1552 kbps (2 Mbps unit only)
OFF OFF OFF 2064 kbps (2 Mbps unit only)
NOTE:
The 1 Mbps unit DSL line rate is defaulted to 1040 kbps (all OFF)
