Cisco AIR-CB21AG-A-K9 rev 02

Overview
"U58H036", "REV: 6", and "Kitty Hawk" is silkscreened on the board shown below).

FCC ID LDK102050 redirects to PPD-AR5BCB-00032

Links of Interest
Cisco's drivers (requires Cisco.com login)

Datasheet

Pictures
User Images 

lspci -nnv dump
06:00.0 Ethernet controller [0200]: Qualcomm Atheros AR5212/AR5213 Wireless Network Adapter [168c:0013] (rev 01) Subsystem: Cisco Aironet Wireless Communications CB21 802.11a/b/g Cardbus Adapter [14b9:cb21] Flags: bus master, medium devsel, latency 168, IRQ 19 Memory at f1d00000 (32-bit, non-prefetchable) [size=64K] Capabilities: [44] Power Management version 2 Kernel driver in use: ath5k

ath5k info dump
ath: EEPROM regdomain: 0x10 ath: EEPROM indicates we should expect a direct regpair map ath: Country alpha2 being used: CO ath: Regpair used: 0x10 ath5k: phy10: Atheros AR5213A chip found (MAC: 0x59, PHY: 0x43) ath5k: phy10: RF5112B multiband radio found (0x36)

Probable revision map
74-3481-01 to 74-3481-02 - made in taiwan - 47-16465-01 rev A0 - AR5212 + AR5112 - rev 01 74-3481-02 - made in china - 47-16465-01 rev A0 - AR5212 + AR5112 - rev 01 74-3481-03 to 74-3481-06 - made in china - 47-16465-02 rev A0 - AR5213A + AR5112 - rev 02