Out of the box it can be a bit confusing to tell if your Yealink phone is running the generic SIP firmware or the special Lync/SfB build – and yes, unlike the competitor, they’re different. It can be a little harder if you’re trying to do this remotely and can’t see the phone’s screen. Here are a few clues.
You’re running SIP if…
- The firmware version is anything like “220.127.116.11″ or “18.104.22.168″ (where the leading “35” in this case indicates it’s for a T48G)
- The idle screen looks like this:
- The Account/Register tab looks like this (very busy with a pulldown to setup multiple accounts):
You’re running the Lync/SfB version if…
- The firmware version is anything like “22.214.171.124″ or “126.96.36.199″ (where the leading “35” in this case indicates it’s for a T48G)
- The Account / Register screen is either of the below, i.e. a lot less ‘busy’ than the equivalent image above:
- This should be a bit of a giveaway ;-)
As the firmware has evolved, more references to SfB are appearing in the phone’s screen and WebUI:
Lync / SfB version
You’ll need a Lync/SfB licence too
Getting hold of the Lync/SfB firmware isn’t sufficient to convert your lucky eBay purchase from SIP – you’ll also need a licence file. This might have been burnt into the device prior to you receiving it, or it will otherwise arrive as a “License_1234567890.dat” file. Loading that is a straightforward process I’ve documented here.