Diagram 8 shows a basic topology diagram I would complete for documenting circuit placement or gateway placement.
Diagram 8
Diagram 1 IVR Logical
Diagram 2 IVR Connectivity
Diagram 3 Multi PN PBX
Diagram 4 IVR LoadBalancedDiagram 5 Vector of IVR Load Balancing
Diagram 6 Basic ACD Call Flow
Diagram 7 Remote Gateway Wiring
Diagram 8 Basic Topology
Diagram 9 Fax over SIP