-
Home
Routers
Create a fast and reliable Wi-Fi
Network Expansion
Easy ways to expand and enhance your network
-
Smart Home
Cloud Cameras
Keeping an eye on what matters
Smart Plugs
Smarten up your home devices
Smart Bulbs
Light for every occasion
-
Business
JetStream Switches
High-Speed wired networking from L3 managed to unmanaged
Omada EAP Series
Professional business Wi-Fi with centralized management
Omada Cloud SDN
The smarter cloud solution for business networking
Pharos Wireless Broadband
Ideal for long range wireless broadband networking
SafeStream Router
Secure VPN and Load Balance gateways to the business
-
Service Provider
DSL
Capable of high-speed network and integrated broadband applications
Wi-Fi Router
The reliable choice for home networking
LTE/3G
Maintains internet access wherever you go.
PON
The leading technology for delivering gigabit Internet services
Powerline Adapter
Transforms electrical wiring to carry the network signal.
Range Extender
Easily expand your Wi-Fi coverage.
Switches
Boosts your business network with premium performance.
Business Wireless
Takes your enterprise Wi-Fi to new levels.
How to troubleshoot on ADSL modem router through DSL parameters checking on TD-8816/8817/8840T/8901N/8151N/8961N(D/B)?
The DSL parameters on ADSL modem routers can reflect line status from your ISP. The most useful parameters are Line Attenuation, SNR Margin and Data Rate. All of the figures are measured in decibels (dB).
Here are some problems listed below which may be related to DSL parameters.
Q: My Internet drops frequently or Internet speed is too low, how can I infer if it’s in a bad line quality?
A: Please check your downstream SNR Margin and Line Attenuation circled in the picture. If SNR Margin is lower than 10dB or Line Attenuation higher than 45dB, your line quality is poor and may suffer from Internet dropping. In this condition, please contact your ISP to check your line quality.
Range of Downstream SNR Margin (For reference only)
10dB and below: Bad and difficult to get Synchronization
11dB-30dB: Normal
30dB and above: Outstanding
Range of Downstream Line Attenuation (For reference only)
20dB and below: Outstanding
20dB-45dB: Normal
45dB and above: Poor and may suffer from Internet dropping
Q: Both of SNR Margin and Line Attenuation are in good status, but Internet still drops, what can I do?
A: You can try as the followings:
- Go to Advanced Setup-> ADSL-> Select “G.DMT” or “ADSL2” as ADSL mode, as is known, lower speed can bring up more stability in complex network environment.
- For wireless dropping
Go to Interface Setup-> Wireless->Select Channel Bandwith as 20MHz (also can try to change Channel to another one or Wireless Mode to 802.11b+g)
Q: How can I know my current synchronous rate from the modem?
A: Data rate, as is shown in the first picture, also called Synchronous rate, is the figure that the modem has synchronized from DSLAM. Usually, the rate consists with the bandwidth your ISP provided.
Q: What can I do if my data rate is far below the bandwidth provided by ISP?
A: Choose Advanced Setup-> ADSL-> Select “ADSL 2+” as ADSL Mode
However, if that doesn’t take effect, you should also confirm the bandwidth and line quality with your ISP.
If you need any further help, please feel free to contact our technical support.
Your feedback helps improve this site.