Do you understand that the problem is with your device and not FS?
So why do you think something would have changed?
here is what you can do to work around it:
look for this param in you sip profile config:
<param name="inbound-codec-negotiation" value="generous"/>
change it to the following:
<param name="inbound-codec-negotiation" value="scrooge"/>
restart and retry
if this is not enough also edit vars.xml
look for
<X-PRE-PROCESS cmd="set" data="outbound_codec_prefs=PCMU,PCMA,GSM"/>
replace it with:
<X-PRE-PROCESS cmd="set" data="outbound_codec_prefs=PCMU@30i,PCMA@30i"/>
retry