I had an early 3640 router with a PRI ISDN module in it. I've since decommisioned the 3640 and I want to put the PRI module in a 2800. However, the 2800 does not appear to recognise it. The 2800 is running c2800nm-advipservicesk9-mz.124-15.T1.bin The Cisco site appears to show that the 2800 supports a PRI ISDN module.
A "show inv" shows an unknown module in the router.
Do I need a newer version of the PRI card for my 2800 ? Is my existing one only good as a door-stop ?