For U1900, which of the following steps must be involved for configuring a PRA trunk? (Multiple Choice)

Question

Options

• AConfigure the trunk board.
• BConfigure the position where the PRA link is located.
• CConfigure rerouting upon a call failure.
• DConfigure the office route number.

• A
  79% (44)
• C
  21% (12)

Explanation

Configuring a PRA (Primary Rate Access/ISDN PRI) trunk on the U1900 requires three mandatory steps: installing and configuring the trunk board (A) provides the physical hardware interface for the PRI line; specifying the position of the PRA link (B) tells the system exactly which slot/port the physical connection occupies; and configuring the office route number (D) integrates the trunk into the dial plan so calls can be routed through it. These three steps form the complete foundation - hardware, physical mapping, and logical routing.

Option C (rerouting upon call failure) is incorrect as a required step because it is an optional, supplementary feature for call resilience. A PRA trunk functions correctly without it; rerouting is only configured when high-availability routing behavior is desired.

Memory tip: Think "Board → Link → Route" (B-L-R, or just remember A-B-D as the "ABsolute Defaults"). Hardware first, locate the link second, define the route third - rerouting on failure is a bonus, not a base requirement.

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