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Post by Deleted on Aug 22, 2006 23:05:12 GMT
What's the status on Connect Radio? Some sources mention 2005, others 2008 for completion but apparently the East London Line is the only one having it operational at the moment. At least, that's the only line I've read comments on the usage so far. Wikipedia mentions more lines should have it by now and all should be finished in 2006 but that could be incorrect. What is the status and who has used it already? Just positive experiences or downsides as well?
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Colin
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Post by Colin on Aug 23, 2006 0:36:09 GMT
The current status is that it should have been delivered in 2000, but is running a little late. The East London line has it - with the Circle, District and H&C next to get it........................*possibly* by the end of this year. Once those 3 lines recieve it, the others are *supposed* to follow in quick succession Connect has also been discussed in THIS THREAD.
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Post by Deleted on Aug 23, 2006 9:24:33 GMT
Thanks for the link to the other thread! It has some nice background info.
I'm still not sure how the actual transmission is taking place. Still through leaky feeders or can the signal bounce off tunnel walls and are antennas at each station enough?
It is a huge leap, going from the tiny ELL to the huge District, must be quite a project. Won't the W&C have it installed from the day it re-enters into service though? They had the ideal moment to install it the past few months and being very short mustn't be too hard to implement compared to the District.
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Colin
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Post by Colin on Aug 23, 2006 11:28:15 GMT
The cables have already been laid throughout the entire network - AFAIK it won't be 'leaky feeder' as that would defeat the object of Connect being a secure system. Whilst I haven't actually read through it, THIS WEBSITE may be of use. As for the Waterloo & City, it would appear to make sense to have connect up & running on it's return - but don't forget it's drivers are supplied by the Central line. I would imagine that the W&C would therefore coincide with introduction on the Central.
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Post by compsci on Aug 23, 2006 13:56:23 GMT
A secure system doesn't need to stop unauthorised persons from getting at the transmissions. Indeed it would be impossible to make a wireless system which didn't make transmissions which could theoretically be intercepted.
A wireless system becomes secure by either making the contents of a transmission meaningless for outsiders, making it hard to know where to look for valid transmissions or both.
Some form of encryption can be used to make the communication meaningless. The simplest form involves the use of a stream cipher. This relies on the transmission being digital (which is the case in all modern systems) and hence being a string of 0s and 1s. This string is called the plaintext. A key is shared between the communicating systems and is used to produce another 01 string (the key stream). In order to encrypt the two strings are combined with an XOR function. This takes two inputs and produces a single output. This is a 0 if the inputs are equal and a 1 if the inputs are different. The result is called the ciphertext. The ciphertext is meaningless without the key.
The reciever can turn the ciphertext back into the plaintext by using the same keystream with the XOR function. The main problem here is that the sender and reciever need to keep synchronised in order for the plaintext to be successfully recovered by the reciever. More complex protocols exist to allow systems to synchronise by looking for patterns in the transmission.
The other approach is to hop between a set of possible transmission frequencies so outsiders won't know where to look for the next part of your transmission. This is also driven by a shared keystream, but with say 10 sequential bits representing one of 1024 possible frequencies for the next transmission. This is more useful when you don't want outsiders to know that you are saying anything at all. There probably won't be too many secret agents using Connect, but this feature is likely to be included anyway as it helps to avoid congestion by spreading load over several channels.
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Deleted
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Post by Deleted on Aug 23, 2006 15:52:04 GMT
If you look at the site COLIN mentioned (thanks for that!) you see the system uses AES block cipher for encryption, no need to worry about the encryption then, when it is implemented right. Which I trust it will, it's an international standard tried, tested and used around the world, even for critical stuff like law enforcement.
Apart from encryption I expect there will be some form of authentication so a device that says it is device 'X' is indeed device 'X'. You'd want that if you want the radio to replace the current 'passing a signal at danger after authorisation through conventional phone line' practice.
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Post by Deleted on Aug 23, 2006 16:28:43 GMT
The last I heard (about 2 weeks ago) was that the District was getting Connect in November 2006. There was even a specific date, although I can't remember what it was.
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Post by c5 on Aug 23, 2006 18:25:08 GMT
The last I heard (about 2 weeks ago) was that the District was getting Connect in November 2006. There was even a specific date, although I can't remember what it was. That is the latest date for Connect 2000 I went for a wander round the other day and there are quite a few despatcher terminals installed, but nothing where I am, where we will have both systems for a "number" of months. We have all got dates to re-do our connect training, as the six months validity has long gone
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Post by Deleted on Aug 23, 2006 22:37:17 GMT
We have all got dates to re-do our connect training, as the six months validity has long gone Connect training was suddenly suspended on the District about 4 weeks ago because of that potential problem, only to start again about a week later. All the equipment seems to have been installed on the trains, both C and D stock - mysterious black boxes with stickers saying "This cab has been modified by the Connect project".
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Post by trainopd78 on Aug 24, 2006 10:02:40 GMT
I'm starting to deliver connect again from Monday. It looks like its going to be earlier than November now. Whips are a cracking. ;)I've seen trackside workers working like bees on connect in many locations over the last few days.
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Post by Deleted on Aug 24, 2006 15:23:46 GMT
I'm starting to deliver connect again from Monday. It looks like its going to be earlier than November now. Whips are a cracking. ;)I've seen trackside workers working like bees on connect in many locations over the last few days. You mean just for the District or for some other lines as well?
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Post by citysig on Aug 24, 2006 17:58:16 GMT
We have all got dates to re-do our connect training, as the six months validity has long gone Re-do That implies you have seen the kit and been through some kind of familiarisation before We are meant to be going live in October - if you read the other thread you will see that I am not as optimistic. A large chunk of the issue(s) that would have delayed Connect further have been, shall we say, worked around. Space has been found for Connect and for a renewal of our equipment. Getting even less cynical, the first few of our people to do the training have been pretty impressed at what they have seen (and they sent the most cynical ones first - my training is next week ;D )
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Post by c5 on Aug 24, 2006 18:01:02 GMT
I still havent been on the course yet. God knows where it's going in our room, the terminals are massive. Technology has improved since the 90's
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Post by Deleted on Aug 24, 2006 19:28:35 GMT
Getting even less cynical, the first few of our people to do the training have been pretty impressed at what they have seen (and they sent the most cynical ones first - my training is next week ;D ) I wouldn't be surprised if in five years most wonder how they ever managed without.
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Post by citysig on Aug 24, 2006 20:41:38 GMT
I wouldn't be surprised if in five years most wonder how they ever managed without. Did you write the training material, as that would definately sell it to me, cynical and all. If not, please apply for a managerial position as we need that sort of positive thinking. There were some of us who had the vision of training people for our room (or a new room) and explaining to an inquisitive trainee that the box of bits on the desk was for the "Connect" project and had they ever heard of it. Sorry. Reformed-ish cynic in one post, and one post later I have a sudden relapse ;D
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Post by citysig on Aug 24, 2006 20:43:04 GMT
I still havent been on the course yet. God knows where it's going in our room, the terminals are massive. Technology has improved since the 90's Techno what... 90's As for terminals, haven't seen any yet ;D
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solidbond
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Post by solidbond on Aug 24, 2006 21:31:56 GMT
I am delivering the training at Upminster next week, and I believe that the latest is that the District will now go live with Connect on October 11th. The Met, Circle and H&C are 'due' to follow about a month or so later. The trackside equipment on the District is now live, so we have been told to be VERY careful what we do with the handheld radios whilst delivering the training ;D ;D The various despatcher terminals are now being installed in the DMTs offices at Barking and Upminster, and, I would imagine, at other places on the line ready for switch-on. Just a shame that I am on leave for the big switch-on ;D ;D
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Post by c5 on Aug 24, 2006 22:01:11 GMT
I take it that the C stock will continue using the old system until connect is live on the Met/C&H, or will they use both...
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solidbond
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Post by solidbond on Aug 24, 2006 22:19:42 GMT
I would imagine that the C stock will continue to use the old system until the Met/C&H Connect is switched on. But who knows? ;D ;D
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Deleted
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Post by Deleted on Aug 24, 2006 22:42:52 GMT
I wouldn't be surprised if in five years most wonder how they ever managed without. Did you write the training material, as that would definately sell it to me, cynical and all. If not, please apply for a managerial position as we need that sort of positive thinking. There were some of us who had the vision of training people for our room (or a new room) and explaining to an inquisitive trainee that the box of bits on the desk was for the "Connect" project and had they ever heard of it. Sorry. Reformed-ish cynic in one post, and one post later I have a sudden relapse ;D No I didn't. I don't work for LU or any of it's contractors, although it may very well be possible somewhere in the future. In fact I do specialise in getting complex technical operations going and getting people 'on board' so I think I can understand the issues and fears a bit. Changes like this to an existing system and organisation are part technical and part plain human. I think there are a few things I can say for sure now. The system will fail, a couple of times, just like any other scheme involving wires and more than three people will do occasionally. Some people (cynics?) will say that it would never have happened with the old system, they may be right for the typical problem at the time but tend to forget the things the old system lacked and forget the breakdowns the old system had. There will be people who didn't like it at first, started to like it over time but will never admit it. There will be people who couldn't wait for it to be introduced, started to see minor flaws over time but will never admit it. If you try to look at the current system from a distance, you can see some things are a bit odd and in need of improvement, to say the least. Try to explain to someone who's never been in London before that apart from the BTP no police, ambulance service or firefighters can communicate on a system that transports millions of people a day and has been the object of terrorism before. From a line controller point of view, imagine alerting four trains at the same time that there's a train in front of them that's a bit slow and that bunching can be prevented if they all kept speed just a tiny bit down. That's a whole lot better than having to throw a signal at danger for minutes while the T/Op is wondering why he is held. Imagine alerting all trains and stations on a specific line that a lady has forgotten a specific brand blue and white bag on the Circle 15 minutes ago and that there is no reason for a security alert if it is discovered. Now, I don't have any operational experience on LU but these are just a few things that come to mind, anyone working on the operational side can probably think of dozens of situations where he or she wanted to be able to just contact a specific train/station/driver/engineer/control room/etc. etc. instantly. By the way, I read your concerns about drivers using the thing as a convenient way to chat. That's is something that's not desirable, I agree, but I'm sure that can be resolved by explaining why it is not desired and being strict about it. From what I read, everyone involved in railways has some obsession with safety. Most people weren't born that way but learn the reasons and procedures by understanding the need for it, I'm quite sure that will work here as well. Hhhmmm... seems I wrote a bit more than I originally intended. ;D
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Deleted
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Post by Deleted on Aug 24, 2006 22:44:12 GMT
I believe that the latest is that the District will now go live with Connect on October 11th. Oh, I'm on holiday 8 - 21 October, so I'll miss all the chaos fun.
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Post by trainopd78 on Aug 25, 2006 10:43:01 GMT
I'm just delivering the west end of the District line. Mr. Solidbond seems to be my east end counterpart. Glad we've both got the same information. I've just worked out i'm on a weeks leave on switch on day too. ADW, have you had your training yet?
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Chris M
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Post by Chris M on Aug 25, 2006 10:54:45 GMT
I've just worked out i'm on a weeks leave on switch on day too. Is there anybody involved in this project who isn't going to be on leave on stwich on day? Cynics and conspiricy theorists would have a field day ;D
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Deleted
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Post by Deleted on Aug 25, 2006 12:08:16 GMT
ADW, have you had your training yet? No.
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Post by trainopd78 on Aug 26, 2006 10:18:49 GMT
ADW, have you had your training yet? No. I can guarantee you will be by the end of the week.
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Post by Deleted on Aug 26, 2006 17:37:39 GMT
Techno what... 90's As for terminals, haven't seen any yet ;D I was at Ricky when the connect team came round to see where all the kit could go as we will be able to talk to drivers in our area, and they pointed out that the monitor would not be flat screen, as all the kit was purchased in the 90s when such things we take for granted now were not really about. If they had something like the MEL uses, that would be good.
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Post by yellowsignal on Sept 1, 2006 19:18:48 GMT
I recently read that next to emergency services private companies start using tetra since it can be made almost 100% reliable. Does LU say anything about the expected reliablity of this system?
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Post by Deleted on Sept 1, 2006 19:35:25 GMT
I can guarantee you will be by the end of the week. Well Wayne, it's the end of the week and I don't feel trained! ;D
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Post by Deleted on Sept 1, 2006 21:15:14 GMT
How long will the new system need to run before the old system will be shut down and removed?
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Post by Deleted on Sept 1, 2006 23:00:01 GMT
How long will the new system need to run before the old system will be shut down and removed? Apparently each train will have one system or the other, not both. And it will take about 2 weeks to convert all the D stocks. In the meantime some trains will have Connect, some will have the old system (but the controller only needs to make a general broadcast once and both systems pick it up).
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