IOS for NM2v

negseven

any ideas what IOS I need for 2651XM and NM2V module ?

pitviper

12.1(14) or later:

Understanding NM-1V and NM-2V Voice Network Modules - Cisco Systems

mikej412

You'd also need the feature set for the IOS version that supports Voice.

Check out the IOS Packaging PDF from the Portable Product Sheets Cisco web page.

You can check the Cisco IOS Feature Navigator to find out what features are supported in a specific IOS or which platforms/IOS supports a specific feature... etc.