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| Certification Vendor: | Nortel |
|---|---|
| Exam Name: | Agile Comm Environment (ACE) Rls. Design & Engineering |
| Exam Number: | 920-521 |
| Exam Price: | Approx. $125–$150 USD |
| Exam Duration: | 90 minutes |
| Certificate Validity Period: | Retired since November 30, 2010 |
| Related Certifications: | 920-520 Agile Communication Environment (ACE) Rls. 1.x Design & Engineering |
| Available Languages: | English |
| Passing Score: | 70% |
| Exam Format: | Multiple Choice, Scenario-Based |
| Real Exam Qty: | 85-100 |
| Exam Way: | Proctored onsite at Prometric / VUE test centers |
| Pre Condition: | Basic knowledge of Nortel IP telephony and ACE environment; prior NNCDS track experience recommended |
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Service & Feature Engineering | 25% | - Security and access control design - Unified communications integration - Call processing and routing design |
| Topic 2: ACE Architecture & Fundamentals | 25% | - Hardware platforms and compatibility - Software release features and capabilities - System components and logical structure |
| Topic 3: Network Design & Sizing | 30% | - Capacity planning and traffic engineering - IP addressing and VLAN design - Redundancy and high availability design |
| Topic 4: Deployment & Interoperability | 20% | - Performance optimization and scalability - Network interface and protocol design - Integration with CS 1000 and BCM systems |
Nortel Agile Comm Environment (ACE) Rls. Design&Engineering is an official Nortel exam, catalogued under the code 920-521. A pass awards you the Nortel Networks Certified Design Specialist (NNCDS) certification at the Professional / Design Specialist level. It also supports progress toward 920-520 Agile Communication Environment (ACE) Rls. 1.x Design & Engineering. Demand for this credential has stayed strong because it validates skills employers can use from day one.
The Nortel Agile Comm Environment (ACE) Rls. Design&Engineering exam packs 85-100 questions into 90 minutes. Candidates rarely fail because of one impossible topic; they fail because ten minutes vanished on three stubborn questions. Build a triage habit now: answer, flag, move on, return later. Timed full-length sessions in the ValidDumps test engine are the most honest way to practice that discipline before it counts.
You pass Nortel Agile Comm Environment (ACE) Rls. Design&Engineering at 70%, and the official registration fee stands at Approx. $125–$150 USD. One detail worth internalizing: there is no retake discount, so a second sitting costs another full Approx. $125–$150 USD. Use the ValidDumps practice tests as your gauge and book only when your results clear the requirement with a repeatable margin, not a one-off peak.
Basic knowledge of Nortel IP telephony and ACE environment; prior NNCDS track experience recommended
Vendor policies shift over time, so confirm the current entry conditions before paying any registration fee.
You can sign up for Nortel Agile Comm Environment (ACE) Rls. Design&Engineering through the official registration points listed here.
Regarding format, the exam is delivered Proctored onsite at Prometric / VUE test centers.
Nortel recommends the following training for Nortel Agile Comm Environment (ACE) Rls. Design&Engineering candidates.
Course content builds understanding, but the exam grades answers. Bridge the two with the 100 practice questions in the ValidDumps 920-521 package, and the theory starts converting into points.
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Nortel Agile Comm Environment (ACE) Rls. Design&Engineering spans 4 official domains. The most heavily weighted include ACE Architecture & Fundamentals (25%), Network Design & Sizing (30%), and Deployment & Interoperability (20%). The full topic list is published above on this page; let the weightings decide where your next study hour goes.
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