ISO IEC 17878:2003 pdf download – Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Inter-exchange signalling protocol — Private User Mobility (PUM) — Call handling additional network features. 6 Signalling protocol for the support of ANF-PUMI 6.1 ANF-PUMI description ANF-PUMI enables calls to be directed to a PUM user within the PISN. As there is no predetermined PINX for the connection of a PUM user to the PISN, the directing of such calls requires that information regarding the location of the user is available. 6.2 ANF-PUMI operational requirements 6.2.1 Requirements on the Rerouteing...