SPA525G2 Firmware Differences between "a" & "a-bt" versions?

[Paul Norman]

Maybe a simple answer to a simple question but when downloading the latest firmware for the Cisco SPA525G / SPA525G2 phones the zip folder appears to contain two versions of the latest firmware file?

for example:

spa525g-7-5-2a

spa525g-7-5-2a-bt

What is the difference between the two?

What would be the correct file for the SPA525G2?

Thanks

[Paul Norman]

Ok well thanks for the help & support, i am guessing the bt in the firmware file is short for BlueTooth!

[Sage Major · Accepted solution]

That is correct.  The BT has the upgraded bluetooth stack.  They have two different firmwares to allow quicker upgrades for customers who do not have BT headsets.

[Paul Norman]

Thanks for taking the time to reply, i searched the net for ages and read the pdf supplied with the firmware but nothing. Kinda guessed it reffered to bluetooth but as the 525g & 525g2 both have bluetooth i couldn't understand why their would be two versions.