In U1900 configuration process/ in which stage are the configurations for number change and call rights performed?

Question

Options

• APrefix configuration
• BOffice route configuration
• COffice route selection code configuration
• DNetwork mode configuration

• A
  81% (38)
• B
  4% (2)
• C
  13% (6)
• D
  2% (1)

Explanation

Prefix configuration is the correct stage because it is specifically designed to handle number manipulation and access control. In the U1900 system, the prefix configuration stage is where administrators define rules for transforming dialed numbers (number changes/translation) and assign call rights-such as which user types can place which categories of calls (local, long-distance, international).

Why the distractors are wrong:

• B (Office route configuration) defines the physical/logical paths between exchanges, not number translation or user permissions.
• C (Office route selection code configuration) determines which route is chosen when multiple routes exist-a routing decision, not a number-change or rights decision.
• D (Network mode configuration) sets the overall network topology (e.g., star, mesh), which is a structural setting unrelated to per-call number manipulation or rights.

Memory tip: Think of the prefix as the "front door key"-it controls what you're allowed to dial (call rights) and how the number gets rewritten (number change) before the call even hits a route. Rights and rewrites happen at the prefix, before routing decisions are made.

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