Brett, Gary wrote:

Hi there

Just a general question, has anybody experienced any problems with any Digium 
telephony cards in the UK, specifically with BT (British Telecom) lines. I just 
want to make sure there are no compatibility issues before purchasing cards, 
(mainly TDM400P's)

Any comments would be greatly appreciated



Can't comment on the UK, but you should be aware that the TDM400 is pretty insistent about PCI 2.2, and the FXS module does NOT provide a ground start configuration. Not a problem if you want just a POTS phone connected, but if you were to attempt to set up a two way trunk to a conventional PBX, you can only provide a loop start line. SOME versions of Asterisk had the loop pulse function not working as well.

Perhaps none of this matters to you, but several collectors are attempting to use the Asterisk box as an interface to interconnect our old switches via the internet, and find the support for such basic telephony somewhat lacking.
Interestingly enough, it seems the chipset used on the TDM 400 module supports a ground start configuration, but Digium chose not to make that available.


John Novack

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