i am new to telecom hardware side. i am basically from the telecom software (NGOSS) side. i require to know the hierarchy in which all cisco equipments are interconnected with each other in the access and distribution networks of PSTN,wireless,MPLS. if there is any complete diagrammatic hierarchical representation showing all CISCO switches, routers,RPRs, DSLAMs,edge routers,etc. then it would be of great help.