X.21 switching system

Details X.21 switching system X.21 switching system

H - Electricity

04

J

363/10, 354/233,

H04J 3/02 (2006.01) H04B 7/212 (2006.01)

Patent

CA 1220832

X.21 Switching System Abstract A system is disclosed to provide X.21 in-band call establishment signaling in the data path of a data communication system in a satellite communications controller. The system includes an X.21 signaling protocol between a data terminal equipment and the satellite communications controller on the terrestrial side and allows self-switched digital data port functions in lieu of associated voice port and line functions as practiced in the prior art. An important aspect is that the signaling rate is the same as the line data rate. At the start of the signaling state, the E input to the call processor is activated for the appropriate port. Call establishment signals are then processed through the digital switch and an X.21 adapter to the system's control processor. Finally the call establishment signaling has been completed and all data bits go through the digital switch and are transmitted to the digital interface. At the end of the call the data port goes back to the first, idle state. MA9-82-014

455135

Affiliated with

Also associated with

Rating

X.21 switching system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with X.21 switching system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and X.21 switching system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1283745