ABSTRACT: This document presents the Telcordia view of generic requirements for X.25-based networks to support the following:
the expansion of the E.164 numbering plan from a maximum of 12 digits to 15 digits.
the elimination of the E.164-to-X.121 escape code, which ISDN (Integrated Services Digital Network) subscribers use to signal X.121
the Type Of Address/Numbering Plan Identifier (TOA/NPI) address block format.
interworking between the TOA/NPI format and the non-TOA/NPI format.
The generic requirements apply to X.25 and X.75/X.75' interfaces of ISDN Packet Handler Functions (PHFs), and Public Packet Switched
Network (PPSN) Packet Switches (PS's), Access Concentrators (ACs), and AC Packet Assembler/Disassemblers (AC/PADs). Components of this product are: