[cisco-voip] Weird image

[Joel Perez]

Hey guys,

I just inherited a 2811 that I am going to put into production. I went to
check the image that is on it to see if I need to upgrade to a more recent
stable release. The image version is 12.4(3g). I tried looking it up at
cisco.com to see what features are included with it and couldn't find it.
The only thing that came close was 12.4(3g)JA and that is for Aironet's. 

Has anybody heard or used this version before?

Thanks,

Joel P