fozzies
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Posts posted by fozzies
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Yeah, the ccna course books, by wendell odom
Looking at book 2 atm , its got 640-816 on it
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For a thorough understanding of ip i would recommend the cisco icnd1 book, available from amazon, or to trully understand the way it all works, the icnd2 book as well. Both excellent books, that relate to the entire ip concept with pratical application to cisco products, but the theory in them relates to all ip products
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Yep agree. but unless you get the pressure spot on it crushes the cable. staple guns only have 2 settings, and there is no way of judging the hardness of the particular spot you are driving one into, so even if they had multiple settings, still no good for a coax. when i say crushes, its only a minor change of the shape of the cable that is needed to affect it, so staple guns are a no-no in the coaxial world
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Staple guns for 6 core etc = great
but for coax? a no-no imo. if you compress the coax you affect its transmission properties higher up the spectrum, making balancing of systems hard to impossible in some cases.ok, if its only 10 meters of cable, but above that, not worth the risk.
Im speaking from knowledge of large aerial systems, but the principal holds true in cctv cabling too.
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Its because it gave him an excuse to do a couple of lines
Lol
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Agree. but used correctly a heaven sent boon
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Why? If used correctly, surely they save you, and you customer a fortune?
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Regarding the offer of work, i avoid pj's. work takes up enough of my time lol. urmet will recommend you a local company suited to the problem, if its london i might end up there anyways lol
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Module. just in case something is deteriorating with heat. we are into the realms of try ot and see if it really isnt the pabx now
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Had one other thought. maybe try powering it down for an hour or so, and see if it works then
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Only thing i can think of doing now is to try the panel with a different telephone line, preferably a non pabx line. maybe you could run a bit of 3 pair from an outgoing line and test it directly. would need to program in a new telepjone number though. 2 and 5 are the connections you need in a bt socket
sounds to me you got a nasty call for even someone familiar with the gear now, good luck!
To recap on your possible faults:
Psu - unlikely as steady voltage reading if a little low
module - unlikely as 2nd unit with same fault
programming of module- works for 30 mins so not this
cabling- tested by using different pair and butt phone so not this
pabx- resetting made it work once
i know where i think the problem is, but the pabx company say not. if you are still stuck after the above i'd say its time they called in a pro, we have covered everything it could be imo
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From the above i note it worked for thirty minutes after the pabx had been reset. if that was the only thing done then it has to be the pabx. try resetting the pabx again, does it all start working again?
If it does, give the fault back to the pabx engineers
And before you wonder, im not permannetly wired into this site, pure fluke i logged in six mins after you posted lol
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No idea on the button mate lol, i only use the mobile side of this website, i assumed it was on the main website as i noticed i had some thanks on me profile lol.
Bring back wifey beating imo, lives would be so much simpler then;D
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i dont believe in coinsidences, not where electronics are concerned. i also believe there is nothing wrong with your psu, unless it is a noisy one( and you could only tell that with a scope), and they only come around once in a blue moon.
Owing to the fact that urmet now require you to register, and pay, for every system you work on and didnt install if you require tech support, we are now starting to replace with alternatives where possible. the cheek of it, charging to support a product!
As for thanks, no worries, but you could clicky on the thanks button as i got a collection im working on
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Sorry, i shoulda explained myself better in my first post. if you put your meter onto dc volts and place one probe onto one side of the button and the other on the other, you would expect to see a voltage when not pressed and no voltage when not pressed. not only does this way of testing confirm the continuity of the switch, but also that it actually connects to something.
The 12.3volts , whilst seeming a little low, should not prevent the unit from working, and as you say that it remains constant when the button is pushed then the psu is not collapsing.
That leaves us with phome line problems imo. the panel connects into a phone line, and when you push a button on the panel, it dials a telephone number just like you woild do at home using dtmf tones.this is why its relevant to actually plug a phone in at the panel location and to dial some extensions from it.if a calibrated test phone fails to make a call then the pabx is not listening to quite the right frequency. if it does make a call then the fault lies with the urmet panel, either with the frequency again, or with the number it is actually dialling. have you checked the number it is dialling? Maybe the pabx needs a pause and it isnt pausing?
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Imo there is more to be checked bwfore new psu. no time to post atm, will reply properly later tonight
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Another thought. is it an old pabx? Maybe its frequency has drifted a bit and isnt always recognising the tones correctly. a calibrated butt phone would prove that
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Plugging a phone in at the panel would test the pabx and line at the same time. i would have suspected a dodgy button too, you could test that by putting a volt meter across both sides of the call button and pushing it. failing that your only left with psu, but that would be strange, i would have thought a collapsing psu would fail to make a complete call at all.
Does the supply collapse when you push the call button?
Ip Cctv Course Etc
in Members Lounge (Public)
Posted
Yeah, that is good value. I payed just under 60 squids for the 2 of them 6 months ago. The second book pulls all the info learned in the first book together, plenty of eureka moments in it
. From my understanding, too many people were failing the ccna exam, so cisco split it into 2 exams, icnd1 and icnd2