IOS version Trains S, T, E etc

[admin_2]

Where can I find information about what does the letter after the version number means? (eg 12.0(1)S or T etc...)

[#2]

A = Access Server/Dial technology (for example, 11.3AA)

D = xDSL technology (for example, 11.3DA)

E = Enterprise feature set (for example, 12.1E)

H = SDH/SONET technology (for example, 11.3HA)

N = Voice, Multimedia, Conference (for example, 11.3NA)

S = Service Provider (for example, 12.0S)

T = Consolidated Technology (for example, 12.0T)

W

= ATM/LAN Switching/Layer 3 Switching (for example, 12.0W5)

See:

http://www.cisco.com/warp/customer/620/1.html