Hi Chris,

You can upgrade the 1230 if it has the proper radio as shown below;

The 1200 Series can be upgraded to LWAPP with the G Radio model listed below;

Solution Requirements

Migration from autonomous access point mode to lightweight mode is possible on these Cisco Aironet access point platforms:

All 1130AG access points

All 1240 AG access points

For all IOS-based 1200 series modular access points (**1200/1220 Cisco IOS Software Upgrade, 1210 and 1230 AP) platforms, it depends on the radio:

if 802.11G, MP21G and MP31G are supported

if 802.11A, RM21A and RM22A are supported

The 1200 series access points can be upgraded with any combination of supported radios: G only, A only, or both G and A.

From this good doc;

http://www.cisco.com/en/US/products/hw/wireless/ps430/prod_technical_reference09186a00804fc3dc.html

So you would need to install the Radio Upgrade kit to install the (AIR-MP21G-A-K9).

Cisco Aironet 1200 Series Access Point Radio Upgrade Instructions

http://www.cisco.com/en/US/docs/wireless/access_point/1200/radio/upgrade/guide/12rupgrd.html

Cisco Aironet 802.11G 1100 and 1200 Series Access Point Upgrade Kit

http://www.cisco.com/en/US/prod/collateral/wireless/ps5678/ps430/product_data_sheet0900aecd801b9233.html

I'm not 100% sure that these kits are still available (but I think they are :)

Hope this helps!

Rob