Troubleshoot Slow Internet Connection – Comprehensive Guide for BSNL Broadband Users

BSNL Broadband PlanA slow connection is every Broadband User’s nightmare. Everyone wishes to enjoy Internet connection at the ISP promised speed. However, due to several depending factors this does not happen, and ISPs promise speeds up to XX Mbps for this reason. Here are certain important things you need to check if you experience slow internet speeds. Today, in a friendly gesture towards TelecomTALK readers, Mr. Bandhan Preet Singh, Computer Engineer at BSNL has shared a troubleshooting guide which will help you find the cause of slowness of your Internet connection. We appreciate Bandhan’s efforts in coming up with this comprehensive guide and thank him for sharing it with us. Also, folks who read BSNL stories here would instantly recognize Bandhan as the BSNL employee who responds to comments.

SNR, Attenuation Value

SNR (Signal to Noise Ratio) value at Downstream must be greater than 13 dB. Attenuation value at Downstream must be less than 45 dB. See DSL Line Parameters in Modem Interface Page under heading Overview or Device Info or Status or Statistics.

MTU (Maximum Transmission Unit)

Almost all MTU sizes (like 1500, 1492 or 1480) give good speed performance among all website browsing and downloading. 1492 is recommended.

ADSL Splitter

ADSL Splitter must be used on a Telephone Line at the subscriber premises if the user is having a Broadband connection. Modem must be fed with pure ADSL signal. Use Multiple Telecommunication devices only after Splitter


Telephone Line Path should be away from any kind of lines and devices which create an electromagnetic field. All the Connecting Terminals or Points must be Clean and free from Rust/Dust/Carbon. A noise free line is recommended


A good quality modem with wiring is highly recommended.

Bridged or PPPoE

PPPoE (Always ON) settings are less stable than Bridge (Dial-up) settings. In cases where you are unable to connect well most of the times, switch to Bridged.

DNS Addresses would play a great role when it comes to opening all websites. You must consider using Google DNS or Open DNS forbetter experience.

  • Google DNS: Configure your network settings to use the IP addresses and as your DNS servers
  • OpenDNS:,

Right Plan for Right Purpose

One should use right broadband plan for the right kind of activity. If you use only email and social networking sites, cheaper plans with smaller FUPs would be sufficient. For video streaming and lot of content downloads you must opt for larger FUPs which will cost more.

Last but not the Least, Wires and connections installed in Pillars and DP boxes should be free from Dust and Rust for good line parameters.

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58 Comments on "Troubleshoot Slow Internet Connection – Comprehensive Guide for BSNL Broadband Users"


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February 23, 2015 10:03 pm 10:03 PM

My connection is not stable. It gets disconnected and is very slow.

February 14, 2015 12:38 pm 12:38 PM

I am only getting a speed of 3 kbps. I hate this junk thing.

December 7, 2014 7:02 pm 7:02 PM

Internet and Ethernet light is not stable, it is always blinking. The net connection is too slow and the files are not downloading fast. Will you tell the remedy?

Dinesh lunar dave
December 2, 2014 11:09 am 11:09 AM

i can not download videos on Internet in bsnl net wok in mumbai. Actually I belong to Bhopal m.p. But for personal reasons I am in mumbai for last 20 days. Wha should be done.

Kavita Kushare
September 22, 2014 10:12 am 10:12 AM
Hello Sir, I am trying to configure the Smart DNS IPs in my windows XP by refering to the below steps. 1. Click Start, click Control Panel, click Network and Internet Connections, and then click Network Connections. 2. Right-click the network connection that you want to configure, and then click Properties. 3. On the General tab (for a local area connection), or the Networking tab (for all other connections), click Internet Protocol (TCP/IP), and then click Properties. 4. Click Use the following DNS server addresses, and then type the preferred DNS server and alternate DNS server IP addresses in the… Read more »
May 17, 2014 8:27 pm 8:27 PM
I’m using the bsnl broadband connection. I wanted to shift my house to another house which is 2 km from my present home. Wen enquired with the bsnl staff they were saying the new house and the post (pole) in which the box is kept is more than 500 metres (wire has to b put that long)and only phone line will work properly it seems and that I will b frequently facing problems with the Internet. The distance between the present home and the pole is 25 metres only. Is it true??? Or should I go ahead with the transfer… Read more »
May 6, 2014 11:14 am 11:14 AM

i do not have those problems

The Biggest problems is still on 512kbps has not upgraded their speed!! since 2011 reality max speed you get 61KB

now i have try evdo leave this slow Junk

Simon D
April 12, 2014 1:21 pm 1:21 PM

If DSL SNR is low , first connect the external line directly to the Modem
ie, without splitter and telephone.
NOW check SNR if OK, check internal wiring otherwise book complaints to 198

September 13, 2014 6:18 pm 6:18 PM

Connecting line directly to modem without splitter worked for me. Thanks

April 4, 2014 7:37 pm 7:37 PM

Is this applicable for BSNL Pune? If not how can we come across someone like Mr. Bandhan who can guide BSNL BB ADSL users from Pune Branch?

Bandhan Preet Singh
April 21, 2014 1:30 pm 1:30 PM

Pls tell Pune BSNL to read this article and act wisely. You may call the local BSNL broadband engineer to go through the content and give it wide publicity.
Do not forget to share this article. 😉

April 21, 2014 1:43 pm 1:43 PM

I’ll try to get Pune Div to send their feedback.

Nikam Umesh Ananda
April 3, 2014 3:16 pm 3:16 PM

I m in search unlimited 3G internet for mobile with min.rental/recharge

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