I have an 8510T phone with the built-in data module. Anyone know what the
latest National-ISDN-compliant software release is called? I have feature
set 3.1 in the phone now (custom only). I also have an EEPROM chip that is
labeled "AHPFH FP SI2_1.0 846878833." It will supposedly update my phone to
National, but I don't know what feature set it is - 2, 3, 4...
Also, is it possible to do CTI with this phone, without buying AT&T's