T46 common.cfg and {MAC}.cfg files question

[DanH]

Hello,

Is there a way to download the current configuration of a T46 phone into a CFG file? That way I could edit just that file and make it available on a TFTP server. Otherwise I have to manually edit the CFG files from scratch.

Another question: I can download (export) the current phone configuration at http://IP-of-phone/servlet?p=settings-config&q=load. However, this produces a .bin file with some binary content. What is the idea here? Is there a way to edit this file and re-import? I checked the content and it seems to contain some, but not all configuration lines that I would expect either in {mac}.cfg or common.cfg.

Yet another question: Basically, I'd like to adapt the MIC gain as mentioned here: http://forum.yealink.com/forum/showthread.php?tid=736. Unfortunately, this very important setting is not exposed in the Web frontend of the phone, which I think is strange...
Anyway, the downloaded default CFG files from the yealink.com site do not contain
voice.handfree_send =
voice.handset_send =
voice.headset_send =
I did also not find those config values in the T46 admin guide...
Any pointer is welcome...

Thanks

Dan