Paradyne 7974 User Manual page 47

7900-A2-GB21-00
Table 4-3 lists Switchpack S3 definitions.
Table 4-3. Switchpack S3 Definitions (Model 7974)
Switch # . . . Allows you to . . .
1 Control whether the unit is an LTU or an NTU.
OFF = NTU
ON = LTU
2 Control whether the unit automatically adjusts to the best line rate for
conditions, or is fixed at the rate set by Switches S3-3 through S3-5.
OFF = Fixed Rate
ON = AutoRate Enabled
3, 4, 5 Control the DSL line rate of the unit. Refer to Table 4-4. If AutoRate is
enabled, this switch represents the maximum DSL AutoRate value.
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 = Enabled
8 Emergency Use Only – Switch between two versions of firmware. The
unit has two banks of flash memory used to hold executable firmware.
This switch allows you to change between the two versions of firmware.
This switch is independent from the position of Switch 1 on Switchpack
S4 (switchpack enable/disable).
OFF = Current Firmware
ON = Previous Firmware
Use Table 4-4 to set the DSL Line Rate. Defaults are shown in bold.
Table 4-4. DSL Line Rate, Switches 3–5 on Switchpack S3 (Model 7974)
Switch Position
DSL Line Rate
5 4 3
OFF OFF OFF 1552 kbps
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
August 2000
Configuring the Unit Using the Internal Switches
Default in Bold
4-5