Caller ID
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Posted by ABLE_1 on January 9, 2007, 10:56 pm
Please log in for more thread options Hello all, I was working on a security panel today and the following is what happened. On the speaker of the butt set just before the 1st ring a small buzz click was heard and then after the first ring a carrier tone is heard for about 1 second and then a pause and then the next ring. Nothing else is heard except for normal rings after that. It is as if another modem or panel is on the line and connecting on the first ring but not answering the call. Has anyone experienced anything like this and/or what the blazes is it or could it be????????? I ran out of time to investigate it further on site with voltages, current, etc. but it seems very strange. Any thoughts from the masses would be welcome. I have been told that this is normal CID. My question, is it??? TIA Les | |||||||||||||||||||||||||||||||
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Posted by Dan J. Rudiak on January 9, 2007, 11:46 pm
Please log in for more thread options It's been a while since I monitored a CID line, but that sounds like what you are hearing. I order for a device to start communicating it would need to close the loop so that the network knew to stop sending ringback tone to the calling part and let the intelligence go through. Cheers! | |||||||||||||||||||||||||||||||
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Posted by David Quinton on January 10, 2007, 3:00 am
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On Wed, 10 Jan 2007 04:46:16 GMT, "Dan J. Rudiak" >It's been a while since I monitored a CID line, but that sounds like what
>you are hearing. > >I order for a device to start communicating it would need to close the loop >so that the network knew to stop sending ringback tone to the calling part >and let the intelligence go through. I think you're right. Here in the UK I was always taught that we did not use the Bellore CLID standard, but we use one that uses a line reversal followed by a squirt of FSK before the 1st ring. However the Bellcore system (US and Canada a mnay other places) sends the data between 1st and 2nd rings. There's a very through webpage here: <http://www.ainslie.org.uk/callerid/cli_faq.htm>
--
Locate your Mobile phone: <http://www.bizorg.co.uk/news.html>
Great gifts: <http://www.ThisBritain.com/ASOS_popup.html> | |||||||||||||||||||||||||||||||
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Posted by Dan J. Rudiak on January 10, 2007, 9:58 am
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Oh... well you didn't let us know you were from across the pond... that's a whole "ruddy" different situation... LOL Dan. > On Wed, 10 Jan 2007 04:46:16 GMT, "Dan J. Rudiak"
> >>It's been a while since I monitored a CID line, but that sounds like what
>>you are hearing. >> >>I order for a device to start communicating it would need to close the >>loop >>so that the network knew to stop sending ringback tone to the calling part >>and let the intelligence go through. >
> I think you're right. > Here in the UK I was always taught that we did not use the Bellore > CLID standard, but we use one that uses a line reversal followed by a > squirt of FSK before the 1st ring. > > However the Bellcore system (US and Canada a mnay other places) sends > the data between 1st and 2nd rings. > > There's a very through webpage here: > <http://www.ainslie.org.uk/callerid/cli_faq.htm> > -- > Locate your Mobile phone: <http://www.bizorg.co.uk/news.html> > Great gifts: <http://www.ThisBritain.com/ASOS_popup.html> | |||||||||||||||||||||||||||||||
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Posted by David Quinton on January 10, 2007, 10:15 am
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On Wed, 10 Jan 2007 14:58:28 GMT, "Dan J. Rudiak" >Oh... well you didn't let us know you were from across the pond... that's a
>whole "ruddy" different situation... I'm not the original poster. "godammit" <G>
--
Locate your Mobile phone: <http://www.bizorg.co.uk/news.html>
Great gifts: <http://www.ThisBritain.com/ASOS_popup.html> | |||||||||||||||||||||||||||||||
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> Hello all,
>
> I was working on a security panel today and the following is what
> happened.
>
> On the speaker of the butt set just before the 1st ring a small buzz click
> was heard and then after the first ring a carrier tone is heard for about
> 1
> second and then a pause and then the next ring. Nothing else is heard
> except for normal rings after that.
>
> It is as if another modem or panel is on the line and connecting on the
> first ring but not answering the call.
>
> Has anyone experienced anything like this and/or what the blazes is it or
> could it be????????? I ran out of time to investigate it further on site
> with voltages, current, etc. but it seems very strange. Any thoughts from
> the masses would be welcome.
>
> I have been told that this is normal CID. My question, is it???
>
> TIA
>
> Les
>
>