We are moving to Holt soon and would like to get an old style pulse dial telephone. Does anyone know if this type of phone will work with the Holt telephone exchange?
Cheers
Ian
On Sat, Apr 14, 2007 at 10:19:54PM +0100, Ian bell wrote:
We are moving to Holt soon and would like to get an old style pulse dial telephone. Does anyone know if this type of phone will work with the Holt telephone exchange?
As far as I know old type telephones will work anywhere on the BT phone system still.
On Sat, Apr 14, 2007 at 10:19:54PM +0100, Ian bell wrote:
We are moving to Holt soon and would like to get an old style pulse dial telephone. Does anyone know if this type of phone will work with the Holt telephone exchange?
No idea on if you can or not... but I must ask... why?
Adam
On 14-Apr-07 22:01:27, Adam Bower wrote:
On Sat, Apr 14, 2007 at 10:19:54PM +0100, Ian bell wrote:
We are moving to Holt soon and would like to get an old style pulse dial telephone. Does anyone know if this type of phone will work with the Holt telephone exchange?
No idea on if you can or not... but I must ask... why?
Adam
Presumably because some of those old models are very elegantly retro ...
Or maybe Ian fancies setting up a simulacrum of a World Way II communications bunker?
(I was going to carry out a test via my own exchange, Brandon Creek, since if a few of us so that it will basically be a test of random BT exchanges, given how widely we're scattered, but I haven't laid hands on my own old phone yet. But it's somewhere ... )
Best wishes to all, Ted.
-------------------------------------------------------------------- E-Mail: (Ted Harding) Ted.Harding@manchester.ac.uk Fax-to-email: +44 (0)870 094 0861 Date: 15-Apr-07 Time: 01:01:15 ------------------------------ XFMail ------------------------------
I'm pretty sure that most modern exchanges still support pulse dialing, but you may have problems with automated phone systems as IIRC they rely on the DMTF signalling.
There are many modern phones that can be switched between pulse and tone dialling by using a switch underneath the main body of the phone, this could be used to test it...
Matt
-----Original Message----- From: main-bounces@lists.alug.org.uk [mailto:main-bounces@lists.alug.org.uk] On Behalf Of Ted Harding Sent: 15 April 2007 01:02 To: main@lists.alug.org.uk Subject: Re: [ALUG] OT: Holt telephone exchange
On 14-Apr-07 22:01:27, Adam Bower wrote:
On Sat, Apr 14, 2007 at 10:19:54PM +0100, Ian bell wrote:
We are moving to Holt soon and would like to get an old style pulse dial telephone. Does anyone know if this type of phone will work with the Holt telephone exchange?
No idea on if you can or not... but I must ask... why?
Adam
Presumably because some of those old models are very elegantly retro ...
Or maybe Ian fancies setting up a simulacrum of a World Way II communications bunker?
(I was going to carry out a test via my own exchange, Brandon Creek, since if a few of us so that it will basically be a test of random BT exchanges, given how widely we're scattered, but I haven't laid hands on my own old phone yet. But it's somewhere ... )
Best wishes to all, Ted.
-------------------------------------------------------------------- E-Mail: (Ted Harding) Ted.Harding@manchester.ac.uk Fax-to-email: +44 (0)870 094 0861 Date: 15-Apr-07 Time: 01:01:15 ------------------------------ XFMail ------------------------------
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On 15 Apr 2007, at 09:51, mephi wrote:
I'm pretty sure that most modern exchanges still support pulse dialing, but you may have problems with automated phone systems as IIRC they rely on the DMTF signalling.
There are many modern phones that can be switched between pulse and tone dialling by using a switch underneath the main body of the phone, this could be used to test it...
According to this site, you should be okay, then again they are trying to sell... which has incidentally worked on me, I'll likely be ordering one! :)
http://www.totally-funky.co.uk/pages/funky/productView.asp? ID=1554&SID=691
-Mark
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Mark Ridley wrote:
On 15 Apr 2007, at 09:51, mephi wrote:
I'm pretty sure that most modern exchanges still support pulse dialing, but you may have problems with automated phone systems as IIRC they rely on the DMTF signalling.
There are many modern phones that can be switched between pulse and tone dialling by using a switch underneath the main body of the phone, this could be used to test it...
According to this site, you should be okay, then again they are trying to sell... which has incidentally worked on me, I'll likely be ordering one! :)
http://www.totally-funky.co.uk/pages/funky/productView.asp? ID=1554&SID=691
-Mark
Worked on me too. I have had a good look around eBay etc and these seem as good as any others. Just ordered an Ivory one.
Cheers
Ian
On Sat, 2007-04-14 at 22:19 +0100, Ian bell wrote:
We are moving to Holt soon and would like to get an old style pulse dial telephone. Does anyone know if this type of phone will work with the Holt telephone exchange?
As others have said, Pulse dial will work pretty much everywhere, certainly it still works here in Bury St Edmunds. However if you have broadband on the same line as your pulse dial phone you will most likely lose ADSL sync every time you dial (despite use of Microfilters etc)
Wayne Stallwood wrote:
However if you have broadband on the same line as your pulse dial phone you will most likely lose ADSL sync every time you dial (despite use of Microfilters etc)
That's interesting; is that from personal experience or do you have any references to that "feature" of pulse dial 'phones?
One to add to the ADSL fault finding "pot".
Mark Rogers wrote:
Wayne Stallwood wrote:
However if you have broadband on the same line as your pulse dial phone you will most likely lose ADSL sync every time you dial (despite use of Microfilters etc)
That's interesting; is that from personal experience or do you have any references to that "feature" of pulse dial 'phones?
One to add to the ADSL fault finding "pot".
New phones which simulate pulse dialling (by clicking a number of clicks) may be ok - but the old rotary ones are done by a metal contact brushing over. This can cause minute sparks as it comes near (right before contact) which is the cause of a very large range of frequencies, in the same way that a spark-gap transmitter does. In the telephone, this would be isolated just to the phone line its communicating on, but if you have adsl on that line, it would cause pulses in the frequenceies. A standard micro filter will probably not be sufficient to block those pulses out, although you could build one that is better quality, (ie spending more then the budget < 10p price that all the commercial ones are built to).
JT
On Mon, 2007-04-16 at 10:01 +0100, Mark Rogers wrote:
That's interesting; is that from personal experience or do you have any references to that "feature" of pulse dial 'phones?
Personal Experience and assumption made based on how I think pulse dialling works.(IANABTE)
The few times I have seen pulse dial phones on a broadband network, dialling using those phones has resulted in a temporary loss of sync (one phone was an old school rotary phone, the other was one of the first generation BT push button phones)
My assumed explanation was as follows
The audible clicks are actually a side effect to how Pulse Dialling works, the technical term for Pulse Dialling is "Loop disconnect".
At it's simplest form a telephone network is a loop of wire with two inductors (one at each end) the inductors being the voice coil in the receiver. You apply a nice bit of bias voltage and if you disconnect and reconnect the line then you get a voltage spike. It's this spike which was used to signal the dialling. 1 spike being 1 2 being 2 and so on. This is why you can still dial a number by whacking the on hook switch on an older telephone (modern phones probably don't provide enough on line inductance to reliably achieve it).
Anyway the transient spike caused by this switch is most likely more than any standard micro-filter could hope to deal with, a few clicks can probably be dealt with by the ADSL modem, but a whole dialling sequence is probably enough to make it think there is a problem and it needs to re-sync.
Wayne Stallwood wrote:
Personal Experience and assumption made based on how I think pulse dialling works.(IANABTE)
[..snip..]
Thanks Wayne, that all makes sense to me (IANABTEE) and goes into the pot of things to ask when ADSL stops working intermittently. If it only makes me sound intelligent it's worth having it to call on :-)
-
Adam Bower -
Chris G -
Ian bell -
James Taylor -
Mark Ridley -
Mark Rogers -
mephi -
ted.harding＠nessie.mcc.ac.uk -
Wayne Stallwood