Interfacing Asterisk & Tadiran

could someone tell me the telephony hardware required on both sides to interface a Tadiran IPX and Asterisk server via Qsig or without Qsig using T1 cards

In the Asterisk side, using a T1 Digital Card . This one could be your best choice :

The Digium TE133 and TE134 cards support industry standard telephony protocols, including Primary Rate ISDN (both North American and Euro Standard) protocol families for voice. Both line-side and trunk-side interfaces are supported, as well as advanced call features. Octasic-based hardware echo cancellation is built in to the cards, which removes the task of echo cancellation from the systems CPU and increases overall system performance and call quality.[/quote]