> 6.4 | Restrictions

> Later enhancements and modifications beyond the certified configuration require extra approvals. Each supplementary approval process includes submittal of the technical documentation as well as testing of the changes made.
> No further approvals are required for customer applications that comply with the approved TC65 Terminal configuration.
> Extra approval must be obtained for applications using other accessories than those included in the approved TC65 Terminal configuration (handset, power supply, MMI implementation supported by AT commands).