Paradyne CSU - Manual (Page 63)

4. Configuration Options
9128-A2-GB20-80 September 2002 4-19
PVC Backup Over the Network Interface
Generally, backup can be performed on the network interface’s frame relay link
using a backup PVC, as well on an ISDN link; the unit does not have to have the
ISDN DBM feature.
In this case, create a DLCI Record on the network interface that will be used for
backup, then modify the PVC Connections or Management PVCs to add the
alternate destination.
Setting Up Back-to-Back Operation
Using this special feature, you can set up two FrameSaver units that are
connected back-to-back without frame relay switches between them, as in a test
bench setup using a crossover cable.
Changing Operating Mode
When setting up back-to-back operation:
T One unit must be configured for Standard operation, which is the setting for
normal operation.
T The other unit must be configured for Back-to-Back operation so it presents
the network side of the UNI (user-network interface).
Only one of the units will have its operating mode changed.
Procedure
To set up back-to-back operation:
1. On the unit to be configured for Back-to-Back operation, manually configure
DLCIs; DLCIs should be configured before connecting the two units.
2. Access the Change Operating Mode screen.
Main Menu
→
Control
→
Change Operating Mode
3. Select Back-to-Back Operation, and respond Yes to the Are you sure?
prompt.
4. Save the change.
Procedure
To return the unit to normal operation:
1. Return to the Change Operating Mode screen and switch back to Standard
Operation.
2. Respond Yes to the prompt and save the change. The units can be
reconnected to a standard frame relay network.