Digital tie line

Multiplex communications – Wide area network – Packet switching

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

370 85, 375 55, H04J 116, H04J 302, H04L 2710

Patent

active

046413006

ABSTRACT:
The digital tie line provides a high speed pulse code modulation (PCM) digital path between private branch exchange (PBX) systems. The invention has a capability of providing a plurality of simultaneous two-way channels. By providing for twice the number of available channels in each PBX system, PBX systems may be interconnected by using one digital tie line per system, resulting in a non-blocking traffic situation between systems. High speed digital data may be directly passed via assigned channels between systems. The digital tie line provides a connection between the internal system parallel PCM bus and an externally located serial bus. A multiple PBX network can be interconnected by multiple external buses by employing a single digital tie line in each PBX system, per external bus. A modular time slot interchanger (MTSI) is used to direct signals between the system PCM bus and the external bus. The digital tie line may be employed for PCM voice and data processing, data switching, and other information communication applications. Connections to the external bus may be made via low cost coaxial cables. Manchester encoding of the serial external bus signal allows the external bus to retain timing and synchronization, and allows for shaping the power spectrum to permit relatively long cable lengths.

REFERENCES:
patent: 3890471 (1975-06-01), Hachenburg
patent: 3963870 (1976-06-01), Couder et al.
patent: 4179587 (1979-12-01), Herschtal
patent: 4340960 (1982-07-01), Moran
patent: 4531834 (1982-05-01), Ganz et al.
patent: 4536877 (1985-08-01), Livingston et al.
patent: 4545051 (1985-10-01), Belforte et al.
patent: 4554656 (1985-11-01), Budrikis et al.
"Non-Military Uses for Manchester Terminal Units"; Communications International, Apr. 1978; Worland; pp. 12-16.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Digital tie line does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

     

Profile ID: LFUS-PAI-O-1095144

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.