19
7984-A2-GZ40-00
February 1999
Table 11 lists Switchpack S2 definitions.
Table 11.
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
Specify whether the Termination Unit will automatically adjust to the
best line rate.
OFF = Fixed Rate Mode
ON = AutoRate Mode
3, 4, 5
Control the DSL line rate of the unit. The three switches form a binary
value used as an index to the table of line rates. Off denotes 0 and On
denotes 1. Refer to Table 12.
000 (all Off) = 1552 kbps
6
Control whether Telco loopbacks are supported.
OFF = Enabled
ON = Disabled
7
Control whether remote Telco loopbacks are supported.
OFF = Disabled
ON = Enable
8
Switch between two versions of firmware. The 7984 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). Emergency Use Only.
OFF = Current Firmware
ON = Previous Firmware
Use Table 12 to set the DSL Line Rate. Defaults are shown in bold.
Table 12.
DSL Line Rate, Switches 3–5 on Switchpack S2
Switch Position
5
4
3
DSL Line Rate
OFF
OFF
ON
1552 kbps
OFF
ON
OFF
1552 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
OFF
OFF
OFF
1552 kbps
