Circuit switched data falls within the Bearer Services category and more specifically to
services (BS 21-26). Both asynchronous (BS 21-26) and synchronous (BS 31-34) options are
available and each data rate (other than 1200bps synch) can operate in transparent or non -
transparent mode (see Section 3.2 above for further explanation).
• Non-Transparent (error correction + flow control)
• Transparent (no error protection and flow control)
• PSTN access (V.32)
• ISDN access (V.110)
• Session-oriented
• Limited to 9k6 (phase 1) or 14k4 (phase 2) per timeslot
services (BS 21-26). Both asynchronous (BS 21-26) and synchronous (BS 31-34) options are
available and each data rate (other than 1200bps synch) can operate in transparent or non -
transparent mode (see Section 3.2 above for further explanation).
Circuit Switched Data
• Two modes defined:• Non-Transparent (error correction + flow control)
• Transparent (no error protection and flow control)
• PSTN access (V.32)
• ISDN access (V.110)
• Session-oriented
• Limited to 9k6 (phase 1) or 14k4 (phase 2) per timeslot