Siemens TIM 1531 IRC - Page 324

Glossary
TIM 1531 IRC
324 Operating Instructions, 02/2018, C79000-G8976-C468-02
CSD
Circuit Switched Data
Service for transferring data in the GSM network. Possible are dial-in connections of GSM
modems to GSM/ISDN/analog modems and other devices with modems. The transmission
speed is 14400 bps full duplex for non-secure transmission and 9600 bps for secure
transmission.
CTS
Clear to send
Signal in the data flow control
Data frame
Data unit transferred between communication partners. Meaning:
● Data unit transferred on the application layer (OSI layer 7)
● General term for a transferred data unit regardless of the relevant OSI layer.
Data frames contain the data of an ST7 object to be transmitted. Depending on the object
type, a message can contain either all data of an ST7 object or a contiguous subarea of the
object data.
See also "Organizational frame"
Direct communication
With direct communication, the S7 stations communicate directly with each other without the
frames needing to be forwarded by a master station or station.
See also "Inter-station communication"
Context: Telecontrol / SINAUT
DNP
Distributed Network Protocol
DNP3 TIM
→ TIM
DSL
Digital Subscriber Line
Standards for transmission of telephone and Internet data with transmission speeds up to
1000 Mbps.