Physical Layer Standards Continued
- V.24 - interface definitions between DTE and DCE; effectively the same as RS-232
- V.35 - provides data transfer rates greater than 19.2 kbps; can use bandwidths of several telephone circuits as a group
- X.21 - defines interface between DTE and DCE for synchronous communication
- G.703 - ITU-T recommended standard for European connections of 2.048 mbps