Data switching apparatus and method

Details Data switching apparatus and method Data switching apparatus and method

1974-03-19

1976-08-10

Cooper, William C.

179 15AQ, H04J 300

Patent

active

039743403

ABSTRACT:
A method and apparatus for switching PCM data in a telephone exchange wherein the switch is of the time-space-time (TST) type comprising a plurality of identical inter-connected groups, each group having two separate planes in which connections may be established. A plane select bit of data is added to each speech sample before switching through the space switching stage. The plane select bit influences a logic circuit at the switch output to determine which plane provides the outgoing data. For reliability connections are duplicated, that is, made in both planes until congestion occurs and when congestion occurs a new call is made in a path of one of the planes previously used for duplication. Information relevant to unduplicated connections is stored in a memory external to the switch to enable unduplicated connections to be re-established if they should be lost due to a fault. The switch has the advantage of being congestionless without necessitating a large external memory for storing information relevant to unduplicated connections.

REFERENCES:
patent: 3629512 (1971-12-01), Yuan
patent: 3660600 (1972-05-01), Lee
patent: 3729591 (1973-04-01), Gueldenpfennig
patent: 3745259 (1973-07-01), Romero et al.
patent: 3851105 (1974-11-01), Regnier et al.

Affiliated with

Also associated with

Rating

Data switching apparatus and method does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1743804