Glossary term
Telegram
communicationBasics
Also known as
Télégramme
Definition
Transmission unit on the KNX bus. Contains: control, source address (16 bits), destination address (16 bits), address type + routing counter + length, payload (1 bit to 14 bytes), checksum. The acknowledgement (ACK) is a separate short frame sent by the receivers.
Questions using this term
- How many bits make up the individual address within a KNX telegram?System Overview · Individual & group addresses
- After a KNX TP device stops transmitting because another device is sending a 0, what does it do next?System Overview · Bus access & signal transmission
- What is the effect of CSMA/CA collision handling on data throughput in KNX TP?System Overview · Bus access & signal transmission
- A KNX TP device has a telegram ready, but a higher-priority telegram is currently on the bus. What happens?System Overview · Bus access & signal transmission
- How many wires of the KNX bus cable are required to transmit telegrams and (in most cases) power the bus device?System Overview · Definition & minimal TP installation
Practice now
Put your KNX Basic knowledge into practice
10 explained practice questions, no sign-up. Find your first topics to revisit.