Hallo Michael,
Snom schreibt dazu:
Parameter names can be followed by one specific character called flag:
A parameter followed by ! can be changed by the user. However the parameter value will only be stored if that parameter has not been configured yet. Only parameters followed by $ can be overwritten, DO NOT use ! in that case.
A parameter followed by & (or no flag) becomes write-protected (read only)
A parameter followed by $ can be changed but will be overwritten on reboot. $ will appear on the Settings page as ! (available from firmware version 4.2 onwards)
Quelle: http://wiki.snom.com/Category:Auto_Provisioning:Configuration_Files
Falls dir der Permission-Tag “&” nichts bringt würde ich vorschlagen die Provisionierung mit dem neueren XML-Files zu probieren. Näheres zu diesem Weg auch hier.
Besten Gruß
Sebastian