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.
