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Chapter 4. Applications
DBU Application 1(non-PRI)
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 (see Figure 4-6). 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.
SITE A
Router
Table 4-1 and Table 4-2 on page 4-13 provide example setups for the
DBU O
table (C
on the example application shown in Figure 4-6.
4-12
TSU IQ+
16
NET
17
DTE
Frame Relay
DBU
ISDN or
POTS Network
(C
>D
PTIONS
ONFIG
>N
ONFIG
ETWORK
TSU IQ+ User Manual
TSU IQ+
NET
DTE
DBU
116
117
TSU IQ+
NET
DTE
DBU
Figure 4-6. Dial Backup Application
B
) and the PVC C
IAL
ACKUP
>PVC C
P
ORT
ONFIG
SITE B
Router
SITE C
Router
ONFIGURATION
). The tables are based
61200275L1-1
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