Is the Summit card SDC-PC10G with the adapter SDC-PC2CF10 a pin to pin replacement for the Cisco card Aironet 350 WLAN card?

PCMCIA is a standard pin-out and based on the link below it should be 68-pin and should be compatible. However, without having the schematics of the Cisco card, it's impossible to tell. On the software side, what OS are you working with? What version of our Summit/Laird software are you working with?

Guides:

Aironet 350: http://www.cisco.com/c/en/us/td/docs/wireless/wlan_adapter/350_cb20a/user/win_ce/2-5/configuration/guide/icg4.pdf (8-2)

SDC-PC10G/SDC-PC2CF10: http://www.summitdata.com/SDC-PC2CF10_PCMCIA.html