Dbu Application Example; Figure 4-6. Dial Backup Application - ADTRAN DSU IQ User Manual

Chapter 4. Applications

DBU Application Example

The following application shows the critical configuration required
for a case where all end points of the frame circuit are equipped
with single call DBU units. This set-up allows any remote site to
place a call to the host site or the host site to place a call to each
remote site based on PVC failure. This set-up also allows the host to
designate primary and alternate sites to call based on port failure
criteria using the call order parameter.
See Figure 4-6, Table 4-1, and Table 4-2 on page 4-13 for an example
of a dial backup application.
The configuration selections given may need modification based on your
network configuration.
SITE A
Router
4-12
DSU IQ
16
NET
17
DTE
Frame Relay
DBU
ISDN or
POTS Network
DSU IQ User Manual
DSU IQ
NET
DTE
DBU
116
117
DSU IQ
NET
DTE
DBU

Figure 4-6. Dial Backup Application

SITE B
Router
SITE C
Router
61200212L1-1