Ypu have the minimum required IOS for the module, it should work.Try using 12.1(5)T5, and check if that works. Also, do you have any other router. If, yes then try putting that module in another router and check.
How did you get it to work? I am having same problem with a NM4A/S card in a 3745 router. It worked at first but now the serial interfaces don't show up in running-config but show diag shows the card is present but says "Port adapter is disabled deactivated". I have tried the card in 3 different slots and of course turned off power when moving card around (left power cord in for grounding) Again, it was once working (serial interfaces were showing up in running-config) so I can't help but wonder if I damaged the slot somehow, however I was very careful when seating card. Have been searching the learning network and google for days now to no avail. Have tried to find something similar to the card type command thinking the port adapter needs to be activated but have not found any documentation about that. Hope card isn't bad all of a sudden but really don't think it is since it worked before and it seems to be recognized just not showing serial interfaces in running-config/sh ip int b (on ios/cli). Really think it's something along the lines of activating card, but not sure.
Yes, Paolo, I have read above. Have you? How and what he did that ended up getting it to work is not very clear to me. Sorry I am not as good as you bud.
Furthermore, from how I interpret the above comments Farhan said he is using 12.3(20) and it sounded like he was going to try using 12.1(5)T5, which, correct me if I'm wrong, but that would not be an upgrade.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...