Careline Anna / GSM uses the STT Condigi patented frequency jumping solution for 869 MHz-868MHz and is also available as Class 1 certified device. Additional key security features include link test, which checks the connection between the Carephone and the emergency transmitters as well as the two-way communication with an active alarm acknowledgement.

Careline Anna / GSM can transmit both speech and nonspeech alarms, to 10 different pre-programmed alarm receivers via the analogue telephone network and / or GSM network. The Careline GSM can also send alerts to 8 different alarm receivers via GPRS.  The alarm receiver can then send the alarm, for example, to mobile phones, local DECT-phones or an alarm central, depending on time and date. Predetermined sequences help to dial to the various emergency beneficiaries and may differ depending on the alarm type.  The Carephone is equipped with both a microphone and a speaker and can be used as speakerphone, which allows calls with no additional interaction from the user side following the alarm activation.

Apart from the alarm transmitter, TX4, Careline Anna / GSM can be connected to additional radio alarm transmitters such as door, motion or smoke alarms. In total, 16 radio-based devices can be connected at once. Wired alarms can also be used with the T-box 869 or via an additional card in the Carephone (note that this requires a special implementation of a socket in the Careline Anna)