SNR margin 16(db) at pillar and 8(db) at my home.....

[bharatk8]

Hi,
As SDO phones had opined that LOW SNR at my place was due to long distance between my house and exchange.So SNR was measured at Pillar from where underground cable reaches my place.Distance between my home and pillar is about 750 meters.SNR was found to be 16 at this pillar.Is that OK?Drop in SNR with compared to Pillar is too much.Does it indicate possibility of damage in underground cable between Pillar and my home?

 

[bharatk8]

Contacted AGM BSNLand told him that I am not getting good connectivity due to damaged/old underground cable He directed SDO to measure line resistance.
[color=rgb(51,51,51);font-family:Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif;font-size:13px;background-color:rgb(250,250,250);] broadband cable was shorted at my end and line resistance was measured at exchange.Line resistance was abnormally high(1.5 times).Does it indicate [/color]
[color=rgb(51,51,51);font-family:Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif;font-size:13px;background-color:rgb(250,250,250);]poor/damaged [/color]underground cable?It is reliably learnt that there is shortage of underground cable.Is there any other way to improve connectivity?

 

[bharatk8]

[color=rgb(51,51,51);font-family:Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif;font-size:13px;background-color:rgb(250,250,250);]Found this info on BSNL site of Chennai under Know your Broadband head.....The SNR[/color]
[color=rgb(51,51,51);font-family:Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif;font-size:13px;background-color:rgb(250,250,250);]should be higher than 20 though anything above 10 is just enough. The Attenuation[/color]
[color=rgb(51,51,51);font-family:Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif;font-size:13px;background-color:rgb(250,250,250);]should be as low as possible. But if the attenuation starts going higher than 40 and SNR[/color]
[color=rgb(51,51,51);font-family:Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif;font-size:13px;background-color:rgb(250,250,250);]going down below 10, it is time to complain about the line condition to our Helpline[/color]
[color=rgb(51,51,51);font-family:Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif;font-size:13px;background-color:rgb(250,250,250);]1500.[/color]
[color=rgb(51,51,51);font-family:Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif;font-size:13px;background-color:rgb(250,250,250);]Also refer[/color]
http://punjab.bsnl.co.in/bandhan_bb1.htmHow[color=rgb(51,51,51);font-family:Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif;font-size:13px;background-color:rgb(250,250,250);] to Rectify Slow/Unstable Internet Speed Problem --- Specially for Broadband Engineers/Users.[/color]

 

[bharatk8]

[color=rgb(51,51,51);font-family:Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif;font-size:13px;background-color:rgb(250,250,250);]Found this info on [/color]http://punjab.bsnl.co.in/bandhan_bb1.htm

[color=rgb(51,51,51);font-family:Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif;font-size:13px;background-color:rgb(250,250,250);]4. Choose Right MTU Size (Maximum Transmission Unit):[/color]
[color=rgb(51,51,51);font-family:Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif;font-size:13px;background-color:rgb(250,250,250);]Almost all MTU sizes (like 1500, 1492 or 1480) give good speed performance among all website browsing & downloading. It is defined inside the Modem or Router configuration page. But one should preferably use 1492 as MTU in all Modem/Router connections until & unless one faces any significant problem with MTU.[/color]

[color=rgb(51,51,51);font-family:Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif;font-size:13px;background-color:rgb(250,250,250);]rep. of BA was ignorant when I showed this information to him,Pl. elaborate.[/color]

 

[uberjon]

I'm assuming that this is a FTTH line? Or is this a DSL line?

 

[x720]

Line resistance et al would apply to copper, no?OP could you post your complete line stats and tariff plan?

 

[uberjon]

Line resistance et al would apply to copper, no?

Absolutely!

 

[bharatk8]

As chasing from lineman to AGM for proper BB connection proved futile,I decided to take up the matter with public relation and grievance cell of BSNL Ahmedabad .

I got number of PGM PGPR from directory inquiry (197) and tried to dial his number several times for 3 days.But no one picked up ringing phone. So I decided to report the matter to DOT and in return, same executive of PGPR(whom I could not contact on phone) sent rejoinder to DOT .I reproduce text of same.

Registration Number : DOTEL/E/2013/10762
Name Of Complainant : bharat khatwani
Date of Receipt : 03 May 2013
Received by : Department of Telecommunications
Forwarded to : Ahmedabad Telecom District
Contact Address : PGM
Ahmedabad Telecom District
Ahmedabad380006
Contact Number : 07926301255
Grievance Description : I am not able to connect to internet during 5 AM to 8 AM In monsoon also net gets disconnected whenever it rains During rest of the period net gets disconnected about 3 times in an hour S N R margin is in range of 5 to 11 and attenuation is 55 to 70 Pairs and ports have been changed several times so far but it has not helped It is reliably learnt that underground cable showed leakage at a particular spot when mega r test was done some time back But this faulty underground cable is not being replaced as exchange do not have underground cable in stock Exchange is located about 3.5 K m s but problem of frequent disconnection is experienced by users located near leakage spot only Housing colony next to my colony(which is at same distance from exchange) enjoys good connectivity while I am facing problems due to damaged underground cable.
Current Status : CASE CLOSED
Your Feedback oor
Date of Action : 14 May 2013
Details : Kindly refer to your grievance registered under the above docket number. The said grievance was forwarded to the concerned service provider who has intimated that : In this connection it is intimated that the field officer visited the subs premises and line parameter tested through OCB EXCH RLP and AT-T Exch Bapunagar on TTY found ok and distance found 6700 meters i.e very long. The ADSL remains steady but SNR found very well from 8.6 to 11.5 and attenuation was 57 while testing on Laptop of BA in presence of party.Also line parameter tested through OCB EXCH RLP and AT-T Exch Bapunagar on TTY found ok and distance found 6700 meters i.e very long. The ADSL remains steady but SNR found very well from 8.6 to 11.5 and attenuation was 57 while testing on Laptop of BA in presence of party.




When I saw same telephone number of PGPR executive( whom I could not contact on phone earlier) in above rejoinder,, Message became loud and clear,"This gentelman has been given job which he do not like doing".Report of field officer was forwarded mechanically without counterchecking facts.TTY does not measure SNR and attenuation.So TTY test can not be relied upon to opine about health of underground cable,which is necessary for BB connectivity.Same way testing through OCB EXCH RLP and AT-T Exch Bapunagar on TTY was also meaningless.Even though SNR and attenuations were measured during joint visit of rep. of BA and SDO,SDO reported wrong figures of SNR and Attenuations and PGM PGPR did not bother to cross check report of SDO by contacting BA or customer(me) or technical experts.

After reading this senseless reply I decided not to quit so easily.I managed to find correct phone number of PGPR .When I confronted PGM PGPR,he asked me to contact GM(East).That was the turning point.Now SDO agreed to measure SNR on pillar and measure line resistance too.He had declined to do so earlier but this time he did not have any choice.After seeing the results of these tests SDO grudgingly agreed to shift my connection to another pillar.It improved SNR only marginally.When I told SDO that SNR and attenuation are not yet as per minimum prescribed levels.
he promised to bring top officers of NIB next day.But he did not keep his promise.So I started interacting with various TTAs.One of them changed line profile as directed in http://punjab.bsnl.co.in/bandhan_bb1.htmHow to Rectify Slow/Unstable Internet Speed Problem --- Specially for Broadband Engineers/Users.

This raised my SNR from 10 to 25db.But attenuations levels decreased only marginally.Ideally,SNR must be below 50.