The TSA concatenates a timestamp to the hash and calculates the hash of this concatenation. Also, there is no operator or command for string concatenation, as the language concatenates directly. Ekho is an open source TTS which simply concatenates sampled syllables. The ## operator (known as the "Token Pasting Operator") concatenates two tokens into one token. Domain-specific synthesis concatenates prerecorded words and phrases to create complete utterances. TDMoIP concatenates the minicells from all active time slots into a single packet.