The 920-551 exam is the official Nortel exam for Nortel GSM BTS 18000 Installation and Commissioning. Passing it earns you the Nortel Certified Support Specialist (NCSS) credential, which sits at the Specialist level. Employers treat the certification as verified proof of skill, which is why structured preparation with 2Pass4sure's practice questions pays off.

The 920-551 exam contains 75-80 questions, and the time limit is 90 minutes. Translate that into a pacing plan before exam day: know roughly how long you can afford per item, flag anything that stalls you, and circle back at the end instead of burning minutes. Two or three full timed sessions in 2Pass4sure's test engine will teach you that rhythm far better than untimed reading ever will.

The passing score for the 920-551 exam is 70%, and the official registration fee is Not officially listed (legacy exam). Remember that a failed attempt means paying that fee again in full for a retake, so treat self-assessment as part of the budget: run 2Pass4sure's practice questions under timed conditions and only book your seat once your scores sit comfortably above the passing bar.

Basic knowledge of GSM networks and radio access systems; relevant field experience recommended Eligibility details can change, so before you register, confirm the current requirements on the official exam page.

You can book the 920-551 exam through the official registration channels below:

• Registration

Exam delivery method: Proctored exam at authorized test centers (originally Prometric).

Nortel points candidates to the following official training options:

• Nortel Official Training (Legacy)

Once the coursework has built your foundation, the fastest way to turn theory into exam readiness is drilling with 2Pass4sure's 75 practice questions for the Nortel GSM BTS 18000 Installation and Commissioning exam.

Yes. 2Pass4sure offers a free PDF demo of the Nortel GSM BTS 18000 Installation and Commissioning practice questions on the samples page, so you can judge the format and quality yourself before paying anything. Every purchase also includes 365 days of free updates, and after the product expires you can extend the update service at a 50% discount from within your member zone.

If you take the corresponding exam within 60 days of purchase and do not pass, 2Pass4sure backs you with a 100% money-back guarantee. To claim it, submit a scanned copy of your exam enrollment slip together with your official Score Report PDF within 2 days of the exam, and the refund is processed within 7 days. The guarantee does not apply to attempts made within the first 3 days after purchase, to products downloaded without actually sitting the exam, or to free materials and expired orders, and the candidate name must match the payer's name. If you would rather have study material than money, you can instead exchange for two additional exam products of equal value, free of charge, while keeping the update service on your original purchase. Delivery itself is instant: your download is available right after payment and a copy reaches your mailbox within one minute — if nothing arrives within 2 hours, contact customer service. You may install the product on as many computers as you need.

The official Nortel GSM BTS 18000 Installation and Commissioning blueprint is organized into 5 domains. The leading areas are:

• Hardware Verification and Initialization — 20% of the exam
• Testing, Troubleshooting and Maintenance — 10% of the exam
• System Overview and Architecture — 20% of the exam

For the complete domain-by-domain breakdown with every subtopic, see the Exam Topics outline above.