Model 7974 Switchpack Definitions - Paradyne 7974 User Manual

4. Configuring the Unit Using the Internal Switches

Model 7974 Switchpack Definitions

For Switchpack S4 definitions, refer to
(Model
Table 4-1.
Table 4-2.
4-4
7974).
Switchpack S4 Definitions (Model 7974)
Switch # . . .
Allows you to . . .
1 Enable or disable Switchpacks S3 and S4.
OFF = Switchpacks Disabled
ON = Switchpacks Enabled
2 Not used
3 Select the unit's primary timing source. Valid only for a unit configured as
the LTU.
OFF = Internal Clock
ON = DSX-1 Clock
4 Control the unit's T1 line coding.
OFF = B8ZS
ON = AMI
5 Control the unit's framing format
OFF = ESF
ON = D4
6, 7, 8 Control the unit's line equalization. Refer to
Switches 6–8 on Switchpack S4 (Model
The three switches form a binary value used as an index to the table of
equalization values. Off denotes 0 (zero) and On denotes 1 (one).
000 (all OFF) = 0–133 feet
Line Equalization, Switches 6 –8 on Switchpack S4 (Model 7974)
Switch Position
8 7 6
OFF OFF OFF
OFF OFF ON
OFF ON OFF
OFF ON ON
ON OFF OFF
ON OFF ON
ON ON OFF
ON ON ON
December 2001
Table 4-1, Switchpack S4 Definitions
7974), to set Line Equalization.
Line Equalization
0–133 feet
133–266 feet
266–399 feet
399–533 feet
533–655 feet
0–133 feet
0–133 feet
0–133 feet
Default in Bold
Table 4-2, Line Equalization,
Default in Bold
7900-A2-GB21-20