ADTRAN TSU IQ+, 1204002L2 user manual DBU Application 1non-PRI, Dial Backup Application

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.

			TSU IQ+	SITE B
			NET	Router
			DTE	LAN
SITE A	TSU IQ+	16	DBU
			116
Router	NET
		17	117
	DTE
LAN			Frame Relay
			TSU IQ+	SITE C
	DBU
			NET
				Router
			DTE	LAN
	ISDN or		DBU
	POTS Network

Figure 4-6. Dial Backup Application

Table 4-1 and Table 4-2 on page 4-13 provide example setups for the

DBU OPTIONS (CONFIG>DIAL BACKUP) and the PVC CONFIGURATION

table (CONFIG>NETWORK PORT>PVC CONFIG). The tables are based on the example application shown in Figure 4-6.

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