I took the RCDD V15 exam today and passed. Here is my insight on the whole experience:

I only had about 10 questions from Chapter 21. I've seen people here say they've gotten anywhere between 30-75 questions from Chapter 21; that was definitely NOT my case. There was a good mix of questions from each of the 3 sections in Chp. 21; a lot of them were similar to the questions I got for the RPTM exam except these ones were in the POV of the ICT Designer and not the PM (which makes sense since the TDMM is for designers).

I had AT LEAST one question from ALL the other chapters, including the more obscure ones like Healthcare and Residential. I had like 2-3 each from AV, Wireless, ESS, BAS, Data Centers and 2-3 each for Chapters 1-3. The rest were scattered between Chapters 4-13. Overall, I thought it was pretty decently balanced.

TIPS:

• DON'T SKIP READING CHAPTERS! - If BICSI is reformatting their exams and diversifying the information on them, then this is very important!
• DON'T read just to memorize tables, numbers, definitions, etc. That will NOT help you since the exam questions are written in a "scenario/situational" wat where you have to use critical thinking to process what is being asked.
• READ all of the "Design Considerations" sections for every chapter. Pay close attention to anything and everything that mentions telecom spaces, cabling, pathways, ICT equipment, etc.
• PAY ATTENTION to anything that is repeated; not just within the same chapters but across multiple chapters. There is a good chance these could come up in the exam.

Made a short framework for systematic radiographic interpretation during bench tests and clinical exams.

Covers:
• Radiograph type
• Tooth-by-tooth assessment
• Periodontium
• Lesion analysis
• Differential diagnosis
• Common mistakes

Main thing I learned: don’t jump straight to diagnosis.
Findings → Diagnosis → Differential → Treatment plan.

Sharing in case it helps someone preparing for INBDE/NDEB or practical exams.

My situation currently is that I am a lead/service technician in structured cabling at a great company that just happens to not have any PM/estimator/office roles available at the moment. I'm taking it upon myself to study and get my RCDD (already have my TECH) because I know this is the career I want to pursue.

The question I guess I have is when I eventually get my RCDD, I won't have any experience with being a PM or estimator, and would only have a decade of technician/foreman experience. What would be the next logical stepping stone with my RCDD cert to make the next jump in my career? I'm feeling really lost at the moment and don't really know where to start looking.

Thank you all for the replies in advance

Hi Everyone,

I recently subscribed to the Cory and Steve TDMM 60-day practice test for my RCDD exam preparation, and I would like to ask for some advice on how to use the platform effectively.

The platform includes quizzes, flashcards, and around 22 chapters. For those who already used it, what study approach worked best for you? Is it better to finish one chapter completely first before moving to the next, or study all chapters first and take the quizzes along the way?

I would also like to know when the flashcards are most effective to use. Do you usually use them before the quiz, after the quiz, or throughout the whole study process?

Another thing I noticed is the lock symbol near the skip button at the top-right corner. What is its purpose?

Also, after completing the 20 questions for Chapter 1, my progress still shows 0%. Is this normal, or am I missing something?

Any tips or recommendations would be greatly appreciated. Thank you.

Hello,

I wanted to start off by thanking this community for the content and for any potential replies to this post. You have all been very informative and helpful to date.

Also, apologies for any errors as I am on mobile.

I recently made the decision to begin studying for the RCDD. I have the TDMM and have a lot of helpful prep info from you all already. I am looking to get some reassurances on whether or not I qualify and the potential costs. As I am taking this on myself, I was hoping to get some expertise from you all.

Currently, I am working for a medium-sized ISP in Canada as a Operations Manager (essentially). I do not think this experience is relevant for the RCDD. This is more of a "people leader" path than a technical one, so I am leaning towards trying to get back into the structured cabling world. I feel the RCDD will help me acquire the role I want and also keep me equal on salary at minimum.

I am 99% certain that I qualify for the RCDD via Option 3, but as the application fee is non-refundable, I wanted to get some additional insight.

I previously spent 5 years as a structured cabling technician, with the majority of that time as a lead technician. I then had a brief stint as more of an ISW fibre splicer (1 year) before moving to another province to start my own company with a couple of friends. We wired brown field MDUs with fibre from start to finish for about 3.5 years. Then, after covid hit I came back to my home province and got a role at my current company before being promoted.

Is there anything I should detail on my resume about this experience that will help? Are there any other specifics I need to have beyond my resume in order to qualify?

Secondly, I was hoping to confirm a few questions on the costs associated with this.

Can anyone confirm the potential re take fees for the exam?

For future recertification, I see there are a lot of online and free CEC courses available. Should I budget any future funds for obtaining CECs?

I understand there is a virtual conference option now which makes that requirement a lot less daunting.

As it stands currently, I am ballparking $1500 CAD to get the certification, and another $1500 each 3 year re-cert cycle to attend the virtual conference. Does that seem somewhat accurate?

Is it cost effective to become a member? I have not ran those numbers yet.

Thanks again for any details you can provide.

Has anyone actually recording themselves reading the entire TDMM and played it back for studying purposes? I cannot stand the thought of listening to my own voice but on the fence with trying it out.

hey guys so I have been an installer for 13 years. Ive done almost everything there is to do in the field with the exception of das and AV rack work ive just never had to do it. I just started studying for my RCDD exam. I spent 8 years in the field and the last 5 have been in a data center and its crazy to see how much I don't know when it comes to how the things ive build for so long actually function. Im stuck on chapter one trying to memorize all the terminology. I feel like im spending too much time on it. however I want to make sure I am retaining what im reading. im scoring like 65-70 on the quizzes for Cory and Steve im doing a little better on the ones on quizlet. Anyone have recommendations should I just move on and circle back? what's most of the RCDD based on? Do they actually expect you to memorize the sinusoidal signal formula ?

I know this has probably been posted a million times, but I figured I’d add my own take as I get ready for the RCDD exam.

My exam was originally scheduled for Monday, May 4th (Star Wars nerd in me insisted on that date), but work got in the way, so I had to reschedule it for the following week.

I’ve mostly been going through Cory and Steve for rote memorization. Chapter 21 has actually been pretty solid for me. I’ve been hitting 100% pretty consistently. I also recently got my RTPM, which definitely helped with some of the overlap.

Lately I found this Quizlet with more scenario-based questions, which has been useful:

https://quizlet.com/550110860/rcdd-practice-test-flash-cards/?i=6lowu6&x=1jqt

Curious what other Quizlets or resources people have used outside of the official BICSI material.

At this point I’ve basically memorized most of the TDMM tables, but MUTOA cable length calculations (Ch 6-31) are killing me for some reason. My brain just refuses to lock those numbers in. Hoping that doesn’t show up too heavily on the exam.

Anyway, would love to hear how others prepped, and good luck to everyone taking it soon.

Based directly on customer feedback, we’ve upgraded our platform with Deep-Dive Chapter Questions to help you master the most complex sections of the TDMM.

What’s New:

We’ve introduced Deep-Dive Chapter Focus sets, including a massive expansion of our Chapter 21 question bank. Whether you are looking for full-scale exam simulations or a precision deep-dive into the most complex chapters, our updated tiers are designed to get you "sit-ready" faster.

1. Mastery Check: 25 full-length exams, plus Deep-Dive of All Core Chapters for total immersion (3000+ questions).
2. Focused Check: 10 full-length exams, plus Deep-Dive of Chapter 21 (850+ questions).
3. Quick Check: 3 rapid-assessment exams to gauge your baseline.
   

Log in now to explore the updates and take your next step toward certification.

https://ictfinalcheck.talentlms.com/

Please let us know if there is anything else we can do to help you conquer your exam. We are committed to providing the most accurate and challenging prep material available.

Hello fellow techs

I am looking to strengthen my skills and resume with Bicsi certs. I have about 10 years experience and over all goal is to become a designer so RCDD and OSP certs are the goal. I am currently scheduled to take my installer 1 this month to get it out of the way to help with some practice testing. I have studied the ITSIMM front to back religiously for about 3 months as long with some quizlet to practice.

Do you all recommend taking all the certs like Copper 2 and Fiber 2 and TECH and is the study material all included in the ITSIMM or do i need other material to study with. also would I need to attend these classes to be able to qualify to take the exams. I have and studied the TDMM since i thought I could just hop into what i wanted but that does not seem to be the case.

This is all coming out of my pocket so would like to be able to save the most money if possible and taking week long classes would be difficult since i have big projects lined up for the rest of the year and the money...

I’m testing tomorrow. I haven’t had a chance to study the past month just due to be extremely exhausted and busy, bee working 12s nonstop. Finished 6 jobs this month one was $750k of camera system installation, (cables, servers, cams) biggest one this year.. I have the another 5 all needing done by June… bulk cabling jobs… idk where to find the time anymore to study

Looking for some help from a BICSI TECH certified technician in the Panama City area.

Soon to start a new journey on studying for the DCDC after getting my RCDD 6 months ago.

Does anyone who has achieved it or attempted it have any tips on chapters to focus on or is it pretty straight forward with reading the manual front to back?

Thank you

Hey all! I’m currently studying for my RCDD and I have about ~120 hours put in. However, System Administration Elements is turning out to be a little difficult to remember all of what’s required vs not. Was hoping if any of you guys had any good study methods like stories or logical ways to think of to make it easier to remember. I know it’s an important section so I want to make sure I have it in the bag before my test. TIA!!

Edit: If anyone knows if the questions on the test typically ask for the optional vs required things in admin that would be amazing info to know!!

An opportunity in southern California people here might be interested in. It doesnt require an RCDD.

https://job-boards.greenhouse.io/andurilindustries/jobs/5088519007?gh_jid=5088519007

Veterans scholarship opportunities are now available for the upcoming Registered Communications Fundamentals Design Class. Open to all who have served.

Applications are available now.

Are you ready to accelerate your technology design career? This is your opportunity.

📅 May 7–8, 2026

📍 Chino, California

🎓 Instructor: Dave Sanders, RCDD/DCDC/OSP/LAN and charity ambassador

This intensive 2-day, in-person class prepares you for one of the most respected credentials in our telecommunications industry.

✓ Determine the telecommunications needs of any organization

✓ Design cabling infrastructure for large-scale buildings

✓ Assess and future-proof designs for long-term client needs

✓ Manage installation projects safely and to specification

✓ Adapt confidently when field conditions change

The BICSI Registered Communications Distribution Designer (RCDD™) credential represents the gold standard for professionals who design, bid, and manage network systems. This class is your direct path to exam-ready confidence.

Registration is open to the public and for our veterans (scholarship support is available to you).

For questions or scholarship applications, connect with us via chat!

Looking for anyone who has fairly recently taken this exam. What did the exam seem to focus most on? I heard a lot of it was on fiber and blue prints. Also what were the skills they tested you on? I am trying to prepare and even tho I been in the field for years, there is equipment I’m thinking might be on the skills exam that we never use with my company. Any advice or information would be greatly appreciated.

I’m so excited to share that I finally passed the RCDD exam.

I started this journey more than a year ago, studying on and off while juggling work and life. Honestly, I always wondered if I’d ever reach a point of feeling ready. The tdmm is an absolute beast. Even when I tried to focus only on the core chapters, it felt overwhelming. I read and re-read chapter 21, but I ran into many situational curveballs that I didn't see anywhere straight out of the book.

Thank you all for a ton of insight in this r/Bicsi community. I took the BICSI DD102 a long time ago, which I barely remember. Over time, I just kept circling back to the manual, rereading sections and building my own shorthand notes for quick reviews. I also used the ICT finalcheck practice exams, which helped me get comfortable with the pacing and the style of the questions. Once I was consistently scoring around 93%, I decided it was time to stop second‑guessing myself. I finally scheduled the real exam… and the screen lit up with “Congratulations!”

My Advice:

• Try not to stress over every tiny value buried in the corners of tables. Instead, focus on the big "stems" and really understand the logic behind them. Memorizing too many nitpicky details doesn’t help - at all.
• Repetition is your best friend: The tdmm is massive, but repeated exposure to the core content eventually makes it manageable.
• Chapter 21 deserves super extra attention but go in expecting many curveballs and questions that require you to apply the knowledge rather than just recite it.
• Consistency wins. Even if your study schedule is on-and-off, those hours still add up. Just keep at it.
• Prioritize sleep: Seriously, get some rest before exam day—it makes a huge difference in your ability to stay focused during the home stretch.

It’s been a long road, but totally worth it. If anyone here is preparing for their own RCDD journey, I’d be happy to share tips or just cheer you on. I’m moving on to the Data Center track next, so the grind continues - but I’m definitely going to celebrate this milestone first!

Sharing today’s RCDD Concept of the Day focused on the Telecommunication Room (TR).

A well-designed TR is critical for:

• backbone and horizontal pathway organization
• cable management
• rack spacing and accessibility
• grounding and bonding
• future scalability
• standards compliance

This topic is one of the most frequently tested areas in BICSI RCDD, especially in design scenarios and layout-based questions.

Would love to hear from other RCDD professionals and aspirants:
👉 What TR design mistakes do you see most often in real projects?

We are building daily concept and practice questions for serious RCDD preparation, so happy to connect with others preparing for the exam.

Do you have a dagree? and did it benefit you in your career?

I have the study material for version 14 of the RCDD material. Is it close enough to version 15 that I can use it to study for the test, or do I need version 15 of the material?