ADTRAN 1204006L1 Bedienungsanleitung PDF herunterladen (Seite 74)

Chapter 4. Applications

4-14 TSU IQ+ User Manual 61200275L1-1

DBU Application 2 (PRI)

The following application shows the critical configuration for a

case where the Host Site of the frame relay circuit is set up to

restore service (see Figure 4-7). This setup uses a PRI ISDN module

and service so that multiple calls can be placed simultaneously. The

criteria for placing a call are based on Host Site port failure or

individual PVC failure. The individual PVC failure should account

for remote sites port outages and frame relay service troubles.

Figure 4-7. PRI DBU Card at Host Site

Table 4-3, Table 4-4, and Table 4-5 on page 4-15 show example

setups for PRI DBU options at the Host Site. These tables are based

on the example application shown in Figure 4-7.

Router

DTE

NET

DBU

TSU IQ+

SITE A

SITE B

SITE C

ISDN or

POTS Network

Frame Relay

Router

LAN

Router

LAN

DTE

NET

DBU

TSU IQ+

DTE

NET

DBU

TSU IQ+

100

101

20 201

BRI

PRI

1 2 ... 69 70 71 72 73 74 75 76 77 78 79 ... 197 198

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ADTRAN 1204006L1 Bedienungsanleitung Seite 74