Customizing V.35/V.11-Compatible Units
5-4
7914-A2-GB20-00
February 1998
Making Changes in Switchpack Mode
When operating in Switchpack Mode, you change configuration options by
moving switches on the circuit board. To enable Switchpack Mode, refer to
Switching Between Terminal and Switchpack Modes
on page 3-2.
Procedure
Use electrostatic discharge (ESD) protection when handling the circuit board. To
open the unit and make changes in Switchpack Mode:
1. Power down the unit and remove the enclosure cover, exposing the circuit
board.
2. Find the switchpack for the configuration options you wish to change. Refer
to the board layout illustration in Appendix C,
Switchpack Definitions
.
3. Place the switchpack or jumpers in the correct position for each desired
configuration option.
4. Replace the enclosure cover and power up the board to reset and enable the
new configuration.
Selecting V.35 or V.11 Signaling
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,
Switchpack
Definitions
, for more information.
Displaying Switchpack Definitions
To display the definition of each position in switchpack S4, enter 3 (for CP units)
or 4 (for CO units) at the Config prompt. Switchpack definitions are also listed in
Appendix C,
Switchpack Definitions
.
Config
→
4
Switch pack S4 definition:
1
–
CO/CP
OFF=CP, ON=CO
2
–
Timing (CO Only)
OFF=Internal, ON=External
2
–
Unused
3-7 –
Payload Rate
See table below
8
–
Configuration
OFF=Terminal, ON=Switchpack
<< Press a key to continue!>>