[Asterisk-Dev] UK Caller ID patch and new CVS

Conroy, Lawrence (SMTP) lwc at roke.co.uk
Fri Jul 23 08:50:32 MST 2004

Hi again, Andrew, folks,
  Yup - the X100P (or clone) is a PSTN card for use with single lines.
Fine device, and WAY cheaper than a TDM4xx with a single populated
FXO module (TDM01B), at least in the UK.

I assumed that you weren't seriously suggesting a TDM01B for a
single analogue line (if they weren't back-ordered). Hence I
guessed that the use case is "a few lines".

AFAICT, the TDM4xx modules don't do busy detection or call
supervision or CLI or have settings for correct impedance
right now for use in the UK - all we have is the *potential*
to get these working sometime in the *future*.

If one does need a couple of lines, then one may have a choice
- PSTN access or ISDN access.

In civilised countries (i.e. not here) it's cheaper to get a
BRI than it is to get two analogue lines. Thus, if one needs
more than one analogue line, it may be cheaper to go for a
BRI from your Comms Provider.

If you DO go for a BRI (or a pair of BRIs) the card(s) WILL
be cheaper (and, most important, it works, out of the box).

No grief with whether or not CLI works - it does now.
Likewise, no grief about progress/call supervision - it
works over here right now.

To sum up, if the use case is more than one line and you don't live
in the U.S of A., then don't forget ISDN - it has several advantages
(not least of which is that we don't do SPIDs over here).

If the use case is a single analogue line, then the price of an
under-populated TDM4xx puts it outside the budget for most people
- it's just too expensive at current UK reseller prices.

all the best,

On 23 Jul 2004, at 15:50, Andrew Kohlsmith wrote:
> On Friday 23 July 2004 10:29, Conroy, Lawrence (SMTP) wrote:
>>> Frankly though, I don't think ANYONE should buy these cards, clone or
>>> no -- Get
>>> the TDMxx series.
>> Why?
>> Does progress tone/call supervision/CLI work in the UK for the TDM4xx?
>> (at least now CLI works with the X100P :).
> The TDM card is a true Digium product, not an OEM card resold by 
> Digium.  IIRC
> the FXO module is far higher quality too.
>> In my experience, ISDN works very well with Junghanns's excellent
>> chan_capi
>> (and the AVM passive cards are cheaper) so if a couple of lines is all
>> you need, ...
> The X101P doesn't support ISDN.  I thought we were talking PSTN here 
> not ISDN?
> -A.
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