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TANDBERG 3G Gateway User Manual
Example2
Suppose 2 out of 4 trunks are connected to one switch and the other 2 to another switch. Now
SS7 signaling fail-over is arranged via two switches and two Signaling Transfer Points (STPs)
over 2 link sets, as can be seen from the schematic and the SS7 window below. Since the trunks
are terminated by the switches, the DPCs of trunk 1 and 2 are 100 and 101, respectively.
However, both links are terminated by the STPs. Link set 1 contains SS7 trunk 1 and is
terminated by an STP with DCP 200. Link set 2 contains SS7 trunk 3 and is terminated by an
STP with DCP 201. For each link 2 routes are available to 2 switches, one directly and one via an
STP. Priority 1 is assigned to all direct links, whereas all links via STPs have the lower priority 2.
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