Registration for the Nortel GSM BTS 18000 Installation and Commissioning goes through the official channels listed here:

• Registration

As for the format, the 920-551 exam is delivered Proctored exam at authorized test centers (originally Prometric) — pick whichever fits your situation when you schedule.

The official Nortel GSM BTS 18000 Installation and Commissioning blueprint is divided into 5 domains, led by System Overview and Architecture (20%), Site Preparation and Installation (25%), and Hardware Verification and Initialization (20%). The full domain-by-domain breakdown is in the syllabus section above — that is the checklist your study plan should follow.

The passing score for the 920-551 exam is 70%, and registering officially costs Not officially listed (legacy exam). That fee buys exactly one attempt — if you fall short, the retake is charged in full again, no discount for a second try. The practical move is to measure yourself first: drill the 75 practice questions at TestKingFree under timed conditions until your mock scores clear the bar with room to spare, then book your seat.

You can. TestKingFree publishes a free PDF demo of the 920-551 practice questions — download it, work through it, and decide on evidence rather than promises. Once you own the full product, 365 days of free updates are included, and an expired product can have its update service renewed at a 50% discount from your member zone.

The 920-551 exam — officially the GSM BTS 18000 Installation and Commissioning — is how Nortel verifies that you can apply its technologies in real working scenarios, and passing it earns you the Nortel Certified Support Specialist (NCSS) certification, a credential at the Specialist level. Employers recognize it because it is vendor-issued and skills-based.

Yes — Nortel lists these training options for the Nortel GSM BTS 18000 Installation and Commissioning:

• Nortel Official Training (Legacy)

Courseware teaches the concepts; repetition makes them exam-proof. Combine whichever course you choose with the 75 practice questions from TestKingFree and you cover both halves of preparation.

You will face 75-80 questions within 90 minutes on the 920-551 exam. Do the math once and the lesson is clear: dwell too long on a hard item and the clock eats your easy points later. The fix is rehearsal, not luck — take full-length timed mocks in the TestKingFree desktop or online test engine until pacing becomes automatic, and learn to flag a question, move on, and return with fresh eyes.

First, delivery: your download is available immediately after payment, and the package also arrives in your email within one minute. If 2 hours pass with nothing in your inbox, check spam and contact support — and feel free to install the software on as many computers as you like, there is no device limit.

Second, the safety net: if you sit the 920-551 exam within 60 days of purchase and do not pass, the TestKingFree money back guarantee entitles you to a full refund. File the claim within 2 days of the exam with a scanned enrollment slip and your official score report (PDF); claims are processed within 7 days. The candidate name must match the payer name, and the guarantee excludes exams taken within 3 days of purchase, purchases never used in an actual exam attempt, free materials, and expired orders. If you would rather keep studying, you can swap the product for two free exam packages of equal value and keep the update service on your original purchase.

Basic knowledge of GSM networks and radio access systems; relevant field experience recommended

Vendor policies shift from time to time, so treat this as your starting point and verify the current criteria on the official Nortel exam page before you schedule anything.