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SNR OVER WIFI(SNoW) TESTERAn independent tool customization project
for BSNL Broad Band field staff.
Author : Pratheesh SContact : 9447936706Version :1.0
© Bharat Sanchar Nigam Limited. 2016 2
The problem.• As Broadband technicians we have to check
every faulty line without any hi-fi line testers.• BSNL doesn`t own any such costly
SNR/Attenuation – ADSL testers for LL Copper Line.
• Presently we are relying only on the DSL lamp of the modem at subscribers office and if DSL is not steady then it is difficult to diagnosis.
© Bharat Sanchar Nigam Limited. 2016 3
• What if the SNR leakage happens at any other place between MDF and Sub Office, Our staff have only HMT or a telephone to check the line health (which is not reliable as noise need not be in audible form)
• A perfect line on telephone/HMT may have high attenuation.
A B
© Bharat Sanchar Nigam Limited. 2016 4
So, we need a tool?
Our requirement is a simple modem like box with• SNR/Attenuation display any-time, any-where between MDF and Sub Office.•Which should be battery powered and handy.
© Bharat Sanchar Nigam Limited. 2016 5
Copper Pair
* Intentionally avoided the complexities
ADSL Box with SNR Display
© Bharat Sanchar Nigam Limited. 2016 6
Benefits of this Black Box tool.
•If we have such a tool we can connect it anywhere in the circuit.•We can observe the SNR leakage real-time.•We can save precious working hours of line staff.•So BSNL will have better Quality Of Service.
© Bharat Sanchar Nigam Limited. 2016 7
What if we can not afford such a tool?
© Bharat Sanchar Nigam Limited. 2016 8
“If you can not afford it then make it yourself” -A modern Proverb
© Bharat Sanchar Nigam Limited. 2016 9
“If you can not afford it then make it yourself”
• Here I am proposing a simple way to make such a tool called SNoW (SNR Over WIFI) by yourself with locally available accessories• Make It Yourself.
© Bharat Sanchar Nigam Limited. 2016 10
Required Hardware Accessories
• ADSL Modem-W1 Type• Make : Syrma Technology
Pvt Ltd.
© Bharat Sanchar Nigam Limited. 2016 11
Required Hardware Accessories
• 12V Battery as Power Supply for modem.
• A UPS Battery or WLL Battery would serve the purpose.
• Connect it with a power code.• Smaller-Lighter the better.
© Bharat Sanchar Nigam Limited. 2016 12
Required Hardware Accessories
12 V Battery
Syrma Modem
RJ11 Jack and clipsto telephone line
© Bharat Sanchar Nigam Limited. 2016 13
Required Hardware Accessories• A basic android Smart
phone• Needs WIFI• Android 1.6 or
up(donut)
© Bharat Sanchar Nigam Limited. 2016 14
SNoW : Hardware Diagram
WIFI Connectivity
Make : Syrma
OS: Android12 V Battery
© Bharat Sanchar Nigam Limited. 2016 15
Software Required
• DSL information of a line is available in the Modem once the ADSL is UP
• Use TELNET to access the modem Command Line Interface(CLI)
• So many free telnet clients are available in the Google Playstore (You can develop one instead!)
• I picked an app called BktSnrSet from the playstore.(I just don’t want to reinvent the wheel)
• Though BktSnrSet is made for adjusting SNR value of a modem, we can customize and use it for our specific purpose.
© Bharat Sanchar Nigam Limited. 2016 16
Software Required : BktSnrSet1. Open Play Store
2. Search for : BktSnrSet
3. Press->
4. Open once it is installed
© Bharat Sanchar Nigam Limited. 2016 17HOME PAGE
1
1.Click here to open Settings Page
2 1.Click here to openAdvanced Setup
Open the installed BktSnrSet app forCustomization.
© Bharat Sanchar Nigam Limited. 2016 18
SNoW Customization on : BktSnrSet app
Advanced Options PAGE
Click here to modify Set Snr Command into wan adsl linedata far
3
4Click here to modify Info Command into wan adsl linedata near
© Bharat Sanchar Nigam Limited. 2016 19
• Now connect the modem in the DSL line any where between the MDF and Sub office.
• And wait to get the DSL lamp steady.
• Connect the Phone to Modem`s WIFI Network.
© Bharat Sanchar Nigam Limited. 2016 20
• Press Set SNR Button• (Which will run the
commands wan adsl linedata far (upstream) and wan adsl linedata near (downstream)
© Bharat Sanchar Nigam Limited. 2016 21
UPSTREAM
DOWNSTREAM
SNR : 27.0 db
Attenuation : 5.9 db
SNR : 42.7 db
Attenuation : 0.6 db
© Bharat Sanchar Nigam Limited. 2016 22
We are done!! Thank you.
© Bharat Sanchar Nigam Limited. 2016 23
My Previous Tools
Incase of suggestions/queries , feel free to contact.
PRATHEESH S.HR No: 201100018TELECOM TECHNICAL ASSISTANTKALLOORKAD TELEPHONE EXCHANGE.VAZHAKULAM (SD), [email protected]+91-9447936706
Offline payment Management System used for Bill collection. Developed for and Implemented in the CSCs of Lakshadweep Telecom Division. This tool has been used since 2012 as there was no CDR PMS modules available to collect LL bills, Print receipt and Manage Payment Information.