H11-811 · Question #66
The U1981 unified gateway supports () PRA trunk at most.
The correct answer is D. 24. The U1981 unified gateway is designed to support up to 24 PRA (Primary Rate Access) trunks, making D the correct answer - this reflects the device's maximum capacity for ISDN PRI connections as specified in its hardware architecture. Options A (4), B (8), and C (12) are common…
Question
The U1981 unified gateway supports () PRA trunk at most.
Options
- A4
- B8
- C12
- D24
How the community answered
(34 responses)- A6% (2)
- B15% (5)
- C6% (2)
- D74% (25)
Explanation
The U1981 unified gateway is designed to support up to 24 PRA (Primary Rate Access) trunks, making D the correct answer - this reflects the device's maximum capacity for ISDN PRI connections as specified in its hardware architecture. Options A (4), B (8), and C (12) are common distractor values that represent partial expansion stages or capacities of smaller or older gateway models, not the U1981's ceiling. These numbers may seem plausible because gateways are often deployed incrementally, but they do not reflect the U1981's documented maximum.
Memory tip: Think of 24 as the number of B-channels in a single North American PRI circuit - the U1981 supports as many PRA trunks as there are bearer channels in one full T1 PRI, which ties the number to a familiar telecom standard and makes it easier to recall.
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