Deal of The Day! Hurry Up, Grab the Special Discount - Save 25% - Ends In 00:00:00 Coupon code: SAVE25
Welcome to Pass4Success

- Free Preparation Discussions
Mail Us support@pass4success.com
Location US
Mob_nav_barsMENU

Huawei H35-210_V2.5 Exam - Topic 2 Question 88 Discussion

According to the ITU-T G.984.X series standards, the downstream transmission wavelength of the GPON network is ( ) nm.
A) 1490
B) 850
C) 1310
D) 1550

Huawei H35-210_V2.5 Exam - Topic 2 Question 88 Discussion

Actual exam question for Huawei's H35-210_V2.5 exam
Question #: 88
Topic #: 2
[All H35-210_V2.5 Questions]

According to the ITU-T G.984.X series standards, the downstream transmission wavelength of the GPON network is ( ) nm.

Show Suggested Answer Hide Answer
Suggested Answer: A

GPON Wavelengths :

GPON networks use specific wavelengths for upstream and downstream transmission:

Downstream (OLT to ONU) : 1490 nm.

Upstream (ONU to OLT) : 1310 nm.

Optional CATV overlay : 1550 nm (used for video services).

Why 1490 nm?

The ITU-T G.984.x standards specify 1490 nm as the wavelength for downstream data transmission in GPON networks. This wavelength is chosen for optimal performance in fiber-optic communication.

Other Options :

850 nm : Used in multimode fiber for short-distance communication, not in GPON.

1310 nm : Used for upstream transmission in GPON.

1550 nm : Optional wavelength for CATV overlay, not for standard downstream data.

Thus, the correct answer is A .


HCIA Huawei ACCESS Official Documentation , Chapter: GPON Wavelengths.

ITU-T G.984.x Standards for GPON .

by Elroy at Apr 05, 2025, 12:12 PM

Limited Time Offer

25%

Off

Get Premium H35-210_V2.5 Questions as Interactive Web-Based Practice Test or PDF

Contribute your Thoughts:

0/2000 characters
Submit Cancel
Leslie
9 months ago
I thought it was 1550 nm, but I guess not!
upvoted 0 times
...
Jolene
9 months ago
Totally agree, 1490 is the right choice!
upvoted 0 times
...
Lavonne
10 months ago
Wait, isn't it 1310 nm for some setups?
upvoted 0 times
...
Eliz
10 months ago
Just checked, 1490 nm is correct. Surprised it’s not more common knowledge!
upvoted 0 times
...
Ruby
10 months ago
It's definitely 1490 nm for GPON.
upvoted 0 times
...
Benedict
10 months ago
I’m pretty confident it’s 1490 nm for GPON, but I need to double-check my notes just to be safe.
upvoted 0 times
...
Suzi
11 months ago
I’m torn between 1490 nm and 1550 nm. I feel like I’ve seen both in different contexts.
upvoted 0 times
...
Eladia
11 months ago
I remember practicing a question similar to this, and I think 1310 nm was mentioned for something else, but not for GPON.
upvoted 0 times
...
Pete
11 months ago
I think the downstream wavelength for GPON is around 1490 nm, but I’m not completely sure.
upvoted 0 times
...
Johnna
11 months ago
Wait, I thought GPON used 1310 nm for downstream? Or was it 1550 nm? Ugh, I'm getting my fiber optic standards mixed up. I better review my notes before answering this.
upvoted 0 times
...
Mary
11 months ago
Okay, let me think this through step-by-step. The question is asking about the downstream wavelength for GPON, which is defined in the ITU-T G.984.X standards. I remember learning that the downstream is 1490 nm, so I'll go with that.
upvoted 0 times
...
Rossana
12 months ago
Hmm, I'm a bit unsure about this one. I know GPON uses different wavelengths, but I can't remember the exact downstream wavelength off the top of my head. I'll have to think this through carefully.
upvoted 0 times
...
Cyril
12 months ago
I'm pretty confident this is 1490 nm, since that's the standard downstream wavelength for GPON networks according to the ITU-T G.984.X series.
upvoted 0 times
...
Martha
1 year ago
Wait, 1310 nm? Are we laying fiber or building a disco ball? 1490 nm is the answer.
upvoted 0 times
Ollie
1 year ago
I think you're mistaken, it's actually 1550 nm for the downstream transmission wavelength.
upvoted 0 times
...
Terry
1 year ago
No way, 1490 nm is the correct downstream transmission wavelength for the GPON network.
upvoted 0 times
...
Willard
1 year ago
1310 nm is the correct answer according to the ITU-T G.984.X series standards.
upvoted 0 times
...
...
Samira
1 year ago
Haha, 850 nm? This isn't the dark ages, folks. 1490 nm is the way to go.
upvoted 0 times
...
Rodrigo
1 year ago
1550 nm? What is this, CATV? Come on, it's gotta be 1490 nm!
upvoted 0 times
Colton
1 year ago
Oh, I see. Thanks for clarifying.
upvoted 0 times
...
Ozell
1 year ago
Actually, it's 1490 nm according to the standards.
upvoted 0 times
...
Sharee
1 year ago
No way, it's definitely 1550 nm.
upvoted 0 times
...
Lorean
1 year ago
I think it's 1490 nm.
upvoted 0 times
...
...
Mitzie
1 year ago
1490 nm, of course! That's the standard for GPON, everyone knows that.
upvoted 0 times
Hyun
1 year ago
That's correct! 1490 nm is the standard for GPON networks.
upvoted 0 times
...
Cyril
1 year ago
Yes, you're right! The downstream transmission wavelength for GPON is 1490 nm.
upvoted 0 times
...
...
Fernanda
1 year ago
I'm not sure, but I think C) 1310 nm is the correct answer based on the ITU-T G.984.X series standards.
upvoted 0 times
...
Lashawna
1 year ago
I believe it's D) 1550 nm because that's the standard downstream transmission wavelength for GPON networks.
upvoted 0 times
...
Leota
1 year ago
I think the answer is A) 1490 nm.
upvoted 0 times
...

Save Cancel