When sending a Voice Message, you have to set a sender id. The sender id must be numeric with the maximum number of characters limited to 16.
In case the sender id used is alphanumeric the recipient will see "Unknown" as sender id.
Text 2 Speech engine supports a maximum 1000 characters of text to be converted into a natural audio file.
Routee currently supports only .wav files for Voice message playback.
Routee charges per second of successful Voice messaging call. This means that you won't be charged for the calls the recipient does not answer. You can see the detailed pricing table here.
Updated about 5 years ago