How Text-to-Speech (TTS) works with eCall:
eCall converts the written text to speech, calls the recipient, and reads the message aloud. You can send text-to-speech SMS messages directly from your eCall account or via an API. We support this feature worldwide including delivery confirmation. Additionally, you can forward incoming SMS messages as voice messages via phone calls.
The system automatically detects the language of the written text and outputs it in the corresponding language version: German, English, French, or Italian. Furthermore, the “High Privacy Voice“ feature is available upon request, in which all content is overwritten after processing.
Four exciting application areas for SMS-to-Voice
- Important messages such as the delivery of access codes, activation PINs, mTANs, etc. Once the message is received, it can be listened to again.
- Urgent messages that recipients must not miss under any circumstances—such as those related to operational planning and employee coordination. If the recipient is unreachable, the system repeats the message twice at five-minute intervals.
- In the alerting sector, where technicians must be reliably and quickly informed about critical malfunctions or measurement values. Receipt can be manually confirmed.
- This can be useful for people with visual impairments because the system calls the recipient and reads the message aloud.
Send text-to-speech messages quickly and easily with eCall
eCall Tip: “Forward SMS as a voice message via phone call”
The system can convert SMS messages you receive via a virtual mobile number rented from eCall into a voice message and forward it as a phone call to any phone number. The system automatically recognizes text in German, English, French, and Italian and reads the message aloud to the recipient.
This feature is ideal for use in emergency alerting—but also anywhere where very important messages need to reach recipients quickly and reliably.
Read SMS messages aloud as voice messages, even for people with visual impairments
You can thus send voice messages to any mobile or landline phone. The service is supported worldwide. The system calls the recipient and reads the message aloud. This can be useful for people with visual impairments. After receiving the message, the recipient can listen to it again and manually confirm receipt. If the recipient is unavailable, the system repeats the message twice at five-minute intervals.

Learn how to optimize your business communications with our SMS gateway in our brochure.
Read-aloud mTANs and other security codes via text-to-speech
Upon request, eCall also sends mTANs via text-to-speech. For two-factor authentication, the system transmits confidential information, such as PINs or access codes, as voice messages via phone calls.
Two key advantages of a voice message:
► A phone call always reaches its destination. With text messages, delivery delays can occur in international traffic, depending on the provider and the recipient’s country.
► We are the only provider that protects voice messages with an additional security feature. With the “High Privacy Voice” option, the system overwrites the message so that it cannot be reconstructed after transmission.
eCall saves landline SMS
Since July 1, 2018, sending and receiving SMS messages to landline numbers is no longer possible without further action. Swisscom has discontinued the “Landline SMS” service. Receiving SMS messages on a landline number is now only possible if the message is sent directly to a mobile phone number or if it is sent via eCall.
With the eCall SMS-to-Speech service, you can continue to send SMS messages to landline phones. The system detects whether the recipient is a landline number and delivers the message as an audio message. SMS messages from technical devices (such as sensors, modems, or similar) can also be received and forwarded by eCall.
Try it for free. And if you have any questions, we’re happy to assist you personally.
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