Yes the transitional firmware is sent from the MCS 5100 to the phone as it only connects via UFTP until fully converted to sip. So I guess not having access to the MCS 5100 rules that out lol. Yes as you say the 11 and 12 connected to tftp even in Unistim mode
"DataService/DHCP/General/DHCPSetting make sure the correct choice is selected"
Are those options within the phone's network settings. Currently I have it set to DHCP yes, DHCP partial, and have also tried it with DHCP off but no different.
If the firmware didn't apply to the phone properly would it limit functionality such as Connecting or something. From reading the 0604DAS readme there was bugs in this release. Might stop from connecting to a server to load another release
Cheers