...
When creating an SS7 network which includes stacks, links, link sets, routes, destinations, etc, the dependencies are too numerous to explain in this document. Please refer to the Configure SS7 topic for information on how to configure an SS7 network.
Field Descriptions
Link ID
...
Select which DS-1 and DS-0 the link being configured will reside on. When configuring the SS7 signaling link, any DS-1 can be used. Click in the Span field and select a DS-1 that the link will reside on. All configured TDM DS-1's located under the Facility object will be displayed in this drop down menu. Refer to the DS-1 Spans topic which has tables created that display the physical to logical span mappings.
...