BT Infinity line checker

I have been monitoring the availability of infinity for my line for months.
The Upminster exchange was selectively enabled at the end of December 2011. Although the telephone number checker has never shown that i can get infinity, the postcode checker has.
For a few months the suggested speed was 14.9meg, that then rose to 24.9 meg and stayed there for a few weeks. This weekend the speed indication rose again to 33meg, but today the POSTCODE checker no longer shows my line as supporting a fibre optic service; what is going on, can anyone throw any light on this and some input from BT Staff woould be appreciated.
Thanks.

johnlewis57 wrote:
I have been monitoring the availability of infinity for my line for months.
The Upminster exchange was selectively enabled at the end of December 2011. Although the telephone number checker has never shown that i can get infinity, the postcode checker has.
For a few months the suggested speed was 14.9meg, that then rose to 24.9 meg and stayed there for a few weeks. This weekend the speed indication rose again to 33meg, but today the POSTCODE checker no longer shows my line as supporting a fibre optic service; what is going on, can anyone throw any light on this and some input from BT Staff woould be appreciated.
Thanks.
The big problem you have is the fact that the telephone number checker does NOT say anything about Infinity which leads people to believe it will not be available to your number yet.
The post code checker is not very accurate as a postcode can be served by more than 1 green street cabinet. (PCP)
If you do not have a BT Telephone line rental with BT this could also be another reason why the telephone number checker is not showing the correct info.
Do you know where your old Green street cabinet is, if you do know, does it have a brand spanking shiny New green Cabinet within about 100ft of it. That will indicate that Infinity will be avaiable sometime.
toekneem
http://www.no2nuisancecalls.net
(EASBF)

Similar Messages

Infinity line checker - buyer beware

Long way from the exchange? Fed up with that slow connection? Thinking of ordering Infinity? I have just gone through over a month's worth of problems trying to get Infinity connected as promised by BT, and want to share my experiences with other rural users.
My exchange - Calder Valley- was one of the first to be upgraded to fibre. In September I had recently contracted to Talk Talk and to be honest wasn't getting good service, so idly checked BT's website and was astounded to find infinity available. I phoned immediately and asked for confirmation that my rural location would be able to get the upgrade. The line was checked and yes, I was told the line registered 39.1Mb download, 15Mb upload. I signed up on the spot. I was given a date for engineer install, but then heard nothing. When the equipment failed to arrive I phoned and was told my order had been cancelled. This was blamed on an internal error, the order had not been properly placed by the BT operative. I re-ordered. The line was rechecked as part of this process, same stats. This time I got all the confirmations you would expect. Great. The order tracker showed a message to say my engineer appointment was no longer required, but when I phoned I was told this was an error, ignore it. I got a text to reconfirm the engineer appointment. Equipment arrived, but having waited in all day the engineer failed to show. No contact, just failed to show. Before the end of the day I phoned, and was told there was a problem moving the line back from Talk Talk. I would have a phone line, but would have to wait for Infinity. I was contacted a couple of days later and told that Infinity could not be provided after all, that I would have to revert to a standard package. I was told the speeds promised earlier were based on a postcode check.
I have problems with the service I've received from BT on many levels.
Given what I know now, I would defy BT to deliver Infinity to anyone with my postcode. Its a rural location.
At no point in the order process was there any qualification or note of caution from BT that they might not be able to deliver the speeds quoted. When I ordered I was told I was told that would be roughly what I would get, subject to the normal variations for traffic etc. This would indeed form BTs side of the contract. Given my location I pressed this point on more than one occasion.
On the basis of the line check I was mis-sold the infinity product not once but twice. I severed my contract with BT's competitors on the back of very dubious information, which was sold as factual.
The individuals I have spoken to at BT have all been decent people, very sorry for my troubles etc. But try to get anyone technical, or anyone senior who can take responsibility and actually sort things out. Impossible.
I typed my details into the line checker again today. Click on 'I've got a BT line' which I now have once again - speed prediction 512k. Click on 'I'm not with BT', speed prediction with Infinity 40Mb. Buyer beware!

Thanks Hamish, I appreciate that this is not one for forum advice as such. When I first looked at infinity and wondered how BT could claim to deliver 39Mb to my location I found the forum a useful source. I posted to add to that information pool.
Although I doubted that it would be technically possible to deliver Infinity to me I went ahead on the basis of 'What's the worst that can happen?' Well now I know. I am constantly amazed that a behemoth corporation like BT can provide such p**s poor disjointed service and get away with it. They are not alone unfortunately.
I understand that Calder Valley was selected to pilot Infinty rollout into rural areas. Not much cop so far. I hope others have a better experience, good luck to them.

Number of infinity lines available in an FTTC cabi...

I'm in a "rural" area with a reasonably high housing density. I would assume interest in moving from circa 200kb to many Mbit/s will be high. A small FTTC cabinet has been installed but not commissioned. Are there only a limited number of infinity lines available in such cabs or can capacity be incread to meet demand? I'd hate to miss out due to demand having been lucky enough to be in an area getting the service......

IMHO I doubt Openreach would rush to install another larger Infinity cab to cope with any overflow... for a while if ever.
So you want to get in first. If you've registered for Infinity don't just wait to be contacted.
Check regularly using your Telephone Number (for most accurate result) in https://www.btwholesale.com/includes/adsl/main.html
Or scroll down a bit to enter your number in the BT Infinity site.
The checker showed my date had been moved to 30th Sept.... I kept checking as my cab was powered up and you could easily hear it's fans running.
Then on 1st July the checker showed Infinity was available.-
Please Click On any Text in Blue as that automatically links to information.
PC (NDEGR)

BT Infinity has reached my area but the line check...

I noted this rather poor general response to a question I see being asked by multiple community members.
=========================================================
Within an exchange area there will be some customers who can't get BT Infinity. There are several reasons why this could be the case:
Your phone line may be connected directly to the telephone exchange and not to a local street cabinet.
Your line may be too far from the local street cabinet to have a stable BT Infinity service.
Your local street cabinet may not be suitable for fibre optic cables.
We haven't yet got the council's planning permission to do the necessary work at your local street cabinet.
So, even though you may be within an enabled exchange area, it's possible that your particular line may not be able to have BT Infinity yet.
=========================================================
I am still waiting for the promised ADSL2 speeds of up to 40mb promised several years ago. I am beginning to suspect that my little community of some 2000 executive homes built less than 12 years ago has some fundamental infrastructure problem that is just too costly for BT to fix.
As far as I can tell none of the above excuses is an issue. Although as I have learnt, and many have commented, knowing anything with BT's roll out evasion policy is frustrating. I'm sure behind all this is a simple business case where BT require a certain % sign up to make enabling a cabinet viable. I just wish they could be honest with their customers.
I know most of my neighbours have given up on BT ever delivering. I also suspect that as we have no other choice of broadband infrastructure BT are in no hurry to satisfy our demands. I have read most of the posts on the forum and cannot see anyway to get a realistic estimate of when or a reason why not.
So if anyone from BT is listening please be honest, publish real information and if I will never get it let me know so I can stop answering the phone to your annoying sales people! ( who should also know they are trying to sell something they cant deliver)
Rant over.

The best bet is to get together and badger your council to get involved. Several people did that round here and BT have eventually responded. Ham pshire County Councildid have a role but it was our local council in Basingstoke who really helped plus a fair few local activists. Its a good argument if you can show that slow speeds are affecting your ability to run businesses etc and that you may have to move.

BT Infinity, Line fault, In-a-rush Engineer, Waste...

Hi Bt Community,
Thanks for all your help, many of you have helped me with your posts prior to this. But now I have a little problem of my own.
After finally getting a moving date last month for my new home with my pregnant girlfriend, we jumped onto the BT Infinity wagon (BT Infinity 2 package, 79mps). We had a date of Monday 23rd for installation. Now, this was booked back in May, so we had this sorted a month in advance. I was told it would be a quick, simple process and that my line can easily be switched back on etc.
The 23rd (last Monday) comes around and as planned I booked the day off work, waited for the Engineer (who was on time) and he came in and started playing with the master socket. He plugged in the BTHUb 5 and it started flashing orange, then the "B" symbol was flashing, meaning there was an issue with the broadband connection. After 25 minutes of talking to his boss, he told me there was nothing he could do and to wait till Wednesday for a call. I asked why the line hadn't been checked prior to his visit and he just shrugged. He was more interested in meeting his quota for the day than to chat and help resolve the situation. He left me clueless and off he went.
Alas, I was patient, I had waited longer for Sky to install their bits when I had them, but at least they had good communication throughout and I knew what was happening and when... I'm happy to wait weeks for a service as long as I'm told what is going on...
Now, I got the call on Wednesday as promised. However it was simply this:
"Hi, I'm calling from BT, just to let you know we are looking to book a new engineer, and we will call on Friday to confirm".
So I wait for a call on Wednesday to be told to wait for a call on Friday? Lovely. But sure, I'll wait some more.
Now, it's Friday, and I get a call saying:
"Hi, I'm calling from BT, just to let you know we have an engineer booked for July 7th, 2 weeks, but if you like I can get this fast-tracked".
"Yes, fast-tracked please"
"Please wait 24-48 hours for a call to confirm".
WHAAAAAAAT?! Why didn't you just fast track it in the first place, my girlfriend and I have already been waiting and have had this service planned since the start of May. What a stupid way to do things.
Now I already emailed them on Wednesday, with no response... I don't know if the line is being fixed, if new optics are being installed, if I have a faulty hub, what? Nothing has been told. I'm just asked to wait.
I hope the BT mods can help, as they seem 10x more helpful than the customer service on the phones, email and face to face.
Thanks, and is this kind of thing normal for BT? Delayed, lack of comms and a pretty shaky start to the service? I was going to add BT TV and all the channels too after Infinity was installed but I dread to think what else could go wrong...
Thanks.
Danny.

Hi Kerrfoxhound
Send us an email using the contact the mods link in my profile.
I can have this investigated to find out what is happening for you.
Thanks
Stuart
BTCare Community Mod
If we have asked you to email us with your details, please make sure you are logged in to the forum, otherwise you will not be able to see our ‘Contact Us’ link within our profiles.
We are sorry that we are unable to deal with service/account queries via the private message(PM) function so please don't PM your account info, we need to deal with this via our email account :-)

BT Infinity - line calibration and possible speed...

Hi,
We recently had BT Infinity installed (14-03-2013) and the speed has dropped significantly from 37 to about 20mb
Up load seems fairly consistent at 8mb
The engineer told us that the line calibration should only take 24hrs so I'm hoping there is an issue and that we can expect better than 20mb
We've been told to expect at least 25mb although it would be nice to get more
Can you advise how long the calibration should take and maybe check to see if everything is OK?
We have had to reset the router a couple of times
Please advise
Thank you
TEST_DATE
TIME_ZONE
DOWNLOAD_MEGABITS
UPLOAD_MEGABITS
LATENCY_MS
SERVER_NAME
DISTANCE_MILES
3/14/2013 9:18 AM
GMT
37.41
8.4
8
London
50
3/14/2013 9:38 AM
GMT
37.28
8.43
6
Maidenhead
0
3/14/2013 11:48 AM
GMT
37.5
8.3
10
Maidenhead
0
3/14/2013 12:00 PM
GMT
37.46
8.17
10
Newbury
0
3/14/2013 1:53 PM
GMT
24.37
8.27
4
Maidenhead
0
3/14/2013 2:34 PM
GMT
16.69
8.25
10
Maidenhead
0
3/14/2013 2:37 PM
GMT
15.75
8.27
11
Maidenhead
0
3/14/2013 2:52 PM
GMT
20.76
8.15
11
Manchester
150
3/14/2013 4:51 PM
GMT
23.35
8.24
10
Maidenhead
0
3/14/2013 6:05 PM
GMT
25.22
8.17
10
Newbury
0
3/14/2013 7:31 PM
GMT
26.05
8.27
8
London
50
3/15/2013 7:50 AM
GMT
17.46
8.13
10
Manchester
150
3/15/2013 8:33 AM
GMT
25.82
8.2
6
Maidenhead
0
3/15/2013 1:31 PM
GMT
25.45
8.3
22
London
50
3/15/2013 5:24 PM
GMT
24.47
8.16
10
Newbury
0
3/16/2013 9:04 AM
GMT
19.54
8.13
10
Cowes
0
Solved!
Go to Solution.

You should never restart the Modem in the first 10 day period. In the first 10 days it will gather line Information then after it has enough on all levels it will decide where your line performed best at and set it at that speed. It will then continue to monitor the line forever and make adjustments. The reason why it's important that you do not disconnect the modem as the Cabinet (DLM) will not be able to make connection with the modem meaning it is recording this and will compensate by lowering the speed until it has a connection. Also turning it off suddenly can cause error bursts on top of that, so it is vital you give your line the best history that you can give it.
It will always look at previous history it has and make decisions from it. If it has bad history at the start it's very reluctant to actually improve the speed in future because it's seen it's not had good history in the past. So it will slowly rise the line speed from 12Mbps to lets say 28Mbps. It will increase it increments due to your bad line history, if it has good say you maintained connection for 90 days and you suffered from a power cut and this put your speed to 20Mbps. Over the next 5/7 days you will normally see it jump straight up back to that speed. If you have bad history it will put the speed up slower and it can take 2/3 weeks for it to actually increase the speed as well.
If this helped you please click the Star beside my name.
If this answered your question please click "Mark as Accepted Solution" below.

Neighbour (BT Engineer) has Infinity despite check...

DISCLAIMER:
I have read the stickys!
My neighbour is a BT engineer and when I asked him about when Infinity would be available in our area, he was surprised as he already has it.
I use the checker weekly to determine if I can get the service and no luck so far. I know the exchange (Fair Oak) has been enabled for a while. I put my neighbours address into the checker and it said it wasn't available - despite him having it!
Is it possible that whatever mechanism the checker uses is wrong? Might I be eligible regardless of what the checker says?
Is there anyone on here that can help me answer these questions?
Thanks,
Sam R
Solved!
Go to Solution.

This is the full output (I already posted this, I believe) form the checker you suggest:
BT BROADBAND AVAILABILITY CHECKER
Available ProductsDownstream Line Rate(Mbps)Upstream Line Rate(Mbps)Downstream Range(Mbps)Availability Date
Featured Products
WBC ADSL 2+
Up to 17
10 to 19.5
Available
WBC ADSL 2+ Annex M
Up to 17
Up to 1.5
10 to 19.5
Available
ADSL Max
Up to 7.5
6.5 to 8
Available
WBC Fixed Rate
2
Available
Fixed Rate
2
Available
For all ADSL and WBC Fibre to the Cabinet (FTTC) services, the stable line rate will be determined during the first 10 days of service usage. Throughput/download speeds will be less than line rates and can be affected by a number of factors within and external to BT's network, Communication Providers' networks and within customer premises.
The Stop Sale date for Datastream is from 30-Jun-2012; the Formal Retirement date for Datastream is from 31-Mar-2014. The Stop Sale date for IPstream is from 31-Oct-2013; the Formal Retirement date for IPstream is from 31-Mar-2014.
Note: Please note that postcode and address check results are indicative only. Most accurate results can be obtained from a telephone number check.Thank you for your interest.
I can't see a cabinet number.
Here is the output from my neighbour oppiosite:
Available ProductsDownstream Line Rate(Mbps)Upstream Line Rate(Mbps)Downstream Range(Mbps)Availability Date
Featured Products
WBC ADSL 2+
Up to 17
10 to 19.5
Available
WBC ADSL 2+ Annex M
Up to 17
Up to 1.5
10 to 19.5
Available
ADSL Max
Up to 7.5
6.5 to 8
Available
WBC Fixed Rate
2
Available
Fixed Rate
2
Available
For all ADSL and WBC Fibre to the Cabinet (FTTC) services, the stable line rate will be determined during the first 10 days of service usage. Throughput/download speeds will be less than line rates and can be affected by a number of factors within and external to BT's network, Communication Providers' networks and within customer premises.
The Stop Sale date for Datastream is from 30-Jun-2012; the Formal Retirement date for Datastream is from 31-Mar-2014. The Stop Sale date for IPstream is from 31-Oct-2013; the Formal Retirement date for IPstream is from 31-Mar-2014.
Note: Please note that postcode and address check results are indicative only. Most accurate results can be obtained from a telephone number check.
Looks the same to me - no mention of Infinity - but he has it....

New infinity line and major speed issues with almo...

Hi,
Just has infinity installed after moving from my previous FTTC provider. With the previous provider i was getting 16 down / 1-2 up and it worked great.
Had my my new inifnity line put in on thrsday and i am getting 17 down / 0.5 up!!
I work from home and connect to the office via vpn and remote desktop and its almost unusable. Laggy, slow, unrepsonsive and is constantly dropping the connection with a failed to read from socket error and is making it very difficult to work form home effectively.
I have a 4g EE modem also and if i switch to this it is like lightening compared.
I also had absolutely no connection issues with my previous provider and as i posted above had a mich better uplink speed - which is where i think im getting most of my issues.
When i signed up to BT this is what i was sent via email:
We estimate your download speed will be 19.1Mb.
We estimate your upload speed will be 3.9Mb.
Im fine with the download but the uplink is shocking compared to the estimate - and as i had much better before i think something is amiss.
Also when i signed up i was told that if i had any connection issues with the new line i had to notify BT within 7 days and it woudl eb investingated but it seems there are so many roadblocks to creating support tickets etc.. Its like it s been hard to report a fault on purpose.
Where can i create a support ticket or similar to get this looked at?
Thanks
Damian

dgreenuk wrote:
Hi,
I work from home and connect to the office via vpn and remote desktop and its almost unusable. Laggy, slow, unrepsonsive and is constantly dropping the connection with a failed to read from socket error and is making it very difficult to work form home effectively.
Thanks
Damian
As you use the internet for work purposes did you have business broadband with your previous provider ?
This is the Residential forum. You may be better posting on the BT Business forum.
Best regards,
dfenceman

Is suggest zero lines Check box available in MIGO

Hi,
In Schedule Agreement
one line item and 3 Schedule lines
In Schedule line 1 : del date 17/05/09   qty : 50 is open qty
In Schedule line 2 : del date 19/05/09   qty : 30 is open qty
In Schedule line 3 : del date 24/05/09   qty : 20 is open qty
when trying to do GR in MIGO today (i.e 15/05/09 for early receipt) system showing error as document does not contain any seletable items
when I tried in MB01, (selected check box : suggest zero lines) GR done properly.
I want to know the same kind of check box (suggest zero lines ) available in MIGO also
kindly advice
Thanks in advance
Best Regards,
Kapil.

Hi,
Thanks for quick reply.
Best Regards,
Kapil.

Command line check file status

I have written a shell script that converts the file to flv then injects it with metadata and does a couple other things. However, the injection starts after about 10 seconds or so. I have read that the shell command "wait" will help but I don't think it is working because it doesn't know when the file has converted completely. Is there a way to know when the file has converted 100%? Can I get a variable and check it and when it is 100 or something then I can move on with my script? Is this possible?

The command line compressor command does not "block" the way you would normally expect a command line tool to do. It returns as soon as it submits the job. Qmaster then manages the job on the queue.
In order to do what you want, you need to use a separate command in a loop that queries Qmaster for your job's status. It returns xml-ish type stuff that you then need to parse out to get your "percent complete or whatever. Once the status returns as "100%" or whatever, you then know you can run your injection command.
To see what I'm talking about, when you submit your job, it should return a string with "jobid" and "batchid" to stdout. Try using those in this command.
`/Applications/Utilities/Batch\ Monitor.app/Contents/MacOS/Batch\ Monitor -clusterName <CLUSTERNAME> -jobid <JOBID> -batchid <BATCHID>`
Have fun.. :-/

Infinity - Line Stabilisation & Performance

Hi,
Had Infinity installed on 5 days ago (Monday 28th Feb.) and have been getting considerably lower d/load speeds than advised. I was told when they did a check during ordering process I would have no problems in getting 36 to 38Mbps d/load and 7 to 8Mbps upload, the upload speed is as suggested, the d/load speed is another matter.
I'm currently connected via wifi (802.11g) for both PC and PS3 (due to master socket being a fair distance from PC on a different floor) and getting about 4 to 7Mbps d/load, I know that Wifi will cause a bottleneck, but I wouldn't have thought to that level. I have tried a wired connection and got about 20Mbps max.
I spoke with a BT representative lastnight who informed me they won't look at d/load speed until at least 10 days after installation as this is the minimum stabilisation period. I was a little surprised by that, 10 days minimum, really?
I guess my question is; should I see a dramatic improvement in my Infinity performance from next weekend or am I being fobbed off?
Thanks in advance.
A.

Rottie wrote:
Antisocial wrote:
Still surprised at 10 days minimum, but in that case I guess I'll wait it out and see how it goes in the coming days. Working on a permanent solution for wired connection which will help, I don't particularly like WiFi anyway... just need some very long ladders now
Thanks.
Hi there,
Another option which might be worth considering, would be the use of "Homeplugs" - Basically, as long as your whole house is served by the same electricity meter, then you'd just need to plug one of these into a spare socket by the router and another one, in a spare socket by your PC, then just use standard ethernet cables to connect the homeplugs to the router and the PC, respectively.
The diagram on this page illustrates it better than I can explain.
I hope this info helps.
As mentioned above the HomePlugs work amazingly and setup is very easy also and you can get upto 200 mbps might suggest looking at Devolo AV200 Series there rock solid.
IceZaroth
BT Community Helper

Infinity, line noise, disconnections: incorrect in...

Hi,
I've had ongoing issues with disconnections on Infinity (and prior to that, copper broadband) - we were getting dozens of disconnections a day - and I think I've found the root cause: intermittent extreme line noise, caused by badly oxidised wiring in the XNTE.
I investigated the entire circuit from faceplate to openreach side of circuit and found the problem to be a very worn connection inside our XNTE (our house is a new build from 2010, so of course we have the infamous XNTE box on the outside wall) - the wires literally fell out of the plug when I touched them.
I've rewired, the line noise has gone and my homehub5 VDSL uptime is nearly two days (its not been this stable since May!) and now I have two questions.
1) Due to the extreme disconnection/error rate, DLM has dropped our data rate to 5.8Mbps download with noise margin of 27/33. How long will it take to re-train? Could/should I request a manual reset? We should be 40Mbps (and indeed, the service ran at this speed for a short while after initial install).
2) My main question: I've read that the XNTE is phased out, and new vDSL installs require the XNTE wiring to be gel-crimped (the XNTE becoming just a simple junction) and a new NTE5 + SSFP (service specific face-plate, I guess this is the one with the filter built into it?) installed as the master socket inside the house. Should this have been done when we switched over to Infinity? Would dearly love some moderator input into this second question. If it turns out we still don't have the correct wiring for Infinity this needs to be addressed.
Thanks in advance for any advice and help.
Solved!
Go to Solution.

Hi punchybda,
Welcome to the forum and thanks for posting about the problems with your line and BT Infinity.
It can take several weeks for DLM to increase the profile again as long as the connection is stable and the noise is gone but if you send in your details we should be able to organise an engineer to visit you and make sure the Infinity set up is up to standard and while he is there he can also organise for the profile to be reset.
Please use the 'contact the mods' link in my forum profile to send in your details and we'll be happy to help you with this. You can find the link by clicking on my username.
Thanks
Neil
BTCare Community Mod
If we have asked you to email us with your details, please make sure you are logged in to the forum, otherwise you will not be able to see our ‘Contact Us’ link within our profiles.
We are sorry but we are unable to deal with service/account queries via the private message(PM) function so please don't PM your account info, we need to deal with this via our email account :-)
If someone answers your question correctly please let other members know by clicking on ’Mark as Accepted Solution’.

Batch Monitor Command line Check Progress

Hey all,
i was wondering if there is a way to check progress of a file i sent to compressor using command line.
Thanks
Lars

ok so i found a pdf which tells me this:
Below is a synopsis of the command for monitoring batches. The Batch Monitor
command is located in /Applications/Utilities/Batch Monitor.app/Contents/MacOS.
Batch Monitor [-clustername <name>] [-clusterid <user name:password@IP address:port
number>] [-jobid <identifier> -batchid <identifier>] [-timeout <seconds>] [-query
<seconds>] [-help]
i tried putting that in but the result i get is Batch: garbled time
any ideas
Thanks
ars

MODS PLEASE-Infinity - line connected direct to ex...

I have today discovered that my home line is connected direct to the exchange, not via a street cabinet.
The Infinity FAQ's say "Your phone line may be connected directly to the telephone exchange and not to a local street cabinet."
Can anyone please explain why I can't get Infinity, despite being connected directly to the exchange?

As allanm said
Infinity is fibre to the nearest cabinet and copper from there to you but copper can only be upo to a certain length
so if your direct copper connection to exchange is longer then there is the reason
If any post helps tick the star box on the left
Just cause Im paranoid dont mean they are not out to get me

Line by line checking

Hi,
my program is running perfectly but it is giving just one digit different than the output which iam expecting .
i want to trace the program line by line , is their any command to trace a program like in " C".

Sure. The sdk comes with a command line debugger, jdb. Most IDEs (such a Eclipse, etc.) also provide debugger support, with the IDE as the user interface. JSwat is a stand alone graphical debugger.
Most debuggers have a learning curve associated, but are well worth the effort for serious debugging.
� {�

BT Infinity line checker

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