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Making Changes in Switchpack Mode
Selecting V.35 or V.11 Signaling
Displaying Switchpack Definitions
7915-A2-GB20-20
When operating in Switchpack Mode, you change configuration options by
moving switches and jumpers on the board hardware. To enable Switchpack
Mode, refer to
Switching Between Terminal and Switchpack Modes
Procedure
To open the unit and make changes in Switchpack Mode:
1. Power down the unit and remove the enclosure cover, exposing the circuit
board. Use electrostatic discharge (ESD) protection when handling the circuit
board.
2. Find the switchpack or jumper header for the configuration options you wish
to change. Refer to the board layout illustration in Appendix C,
and Jumpers
.
3. Place the switchpack or jumpers in the correct position for each desired
configuration option. Refer to Appendix C,
definition of each switch and jumper.
4. Replace the enclosure cover and power up the board to reset and enable the
new configuration.
Jumpers P6 – P21 on the board determine whether the unit uses V.11 or V.35
signaling. The unit defaults to V.35. To switch between V.11 and V.35, you must
move the position of jumpers P6 – P21. Refer Appendix C,
Jumpers, for more information.
To display the definition of each position in switchpack S4, enter 4 at the Config
prompt. Switchpack definitions are also listed in Appendix C,
Jumpers
.
Config
4
Switch pack S4 definition:
1
–
CO/CP
2
–
Timing (CO Only)
2
–
Unused
3-7 –
Payload Rate
8
–
Configuration
<< Press a key to continue!>>
September 1997
Customizing V.35/V.11-Compatible Units
Switchpacks and
Switchpacks and
Switchpacks and
OFF=CP, ON=CO
OFF=Internal, ON=External
See table below
OFF=Terminal, ON=Switchpack
on page 3-2.
Switchpacks
Jumpers, for the
5-5
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