How to connect Cisco 2900 ISR and NEAX 2000 IPS? It is necessary to put what module in Cisco 2900 ISR (Cisco 2911 or Cisco 2921) what to incorporate with NEAX 2000 IPS on stream E1?
A straightforward is to use regular T1/E1 PRI card on the 2900 such as VWIC2-1MFT-T1/E1= or VWIC2-2MFT-T1/E1= depending on the number of channels you need. QSIG if licensed on the NEC side(usually a cost) can provide additional features such as Caller Name, supplementary services etc but isn't required. One can even do an analog integration using FXS/FXO ports. SIP may also be an option
Here is an example with a different NEC model. Also if you Google for this you will see threads from others who have used T1 CAS to get it to work.
Retrieving data ...