Fault and Performance Management of V5 Interface Environments and Associated Customer Profiles - Series Q: Switching and Signalling Specifications of Signalling System No. 7 - Q3 Interface Study Group 4; 51 pp
V5 interfaces, as described in Recommendations G.964 and G.965, operate between a Local Exchange (LE) and an Access Network (AN) to support various narrow-band Integrated Services Digital Network (ISDN) and Public Switched Telephone Network (PSTN) services. These interfaces and their associated user ports need to be managed by the Operations Systems (OSs) within the Telecommunications Management Network (TMN). This management is performed by means of 43 interfaces.