Method and an apparatus for mutually converting different signaling systems
AssigneesElectronics and Telecommunications Research Institute, Korea Telecommunication Authority
InventorsKim J. Myung, Kim J. Guen, Youm H. Youl, Kim C. Hee
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Abstract
The invention provides an effective and reliable method of mutually converting different signaling systems which interconnect E1 signals and T1 signals, and by which signaling conversion functions with loop signaling or R2 signaling method can be performed and the transmission devices of various signaling systems can be interconnected. And also the invention provides a converter for implementing such methods, which comprises an input signaling bit state analyzing means and a signaling bit storage and conversion means.
Claims9
A method of mutually converting different signaling systems comprising the steps of:
- a first step of determining whether a block consisting of a plurality of channels is in a second interrupted state;
- a second step of reading a corresponding flag which is set when a first interrupt occurs due to a transition of signaling bit(s) of a channel and then performing a signaling conversion function in each channel where state transition does not occur when a second interrupt occurs;
- a third step of determining whether the block, which jumped the second step after being processed in the first step or on which the different signaling conversion function is performed in the second step, is in a first interrupted state;
- a fourth step of detecting the channels in which the transition of signaling bits occur when the block in the third step is in the first interrupted state, setting the flag of the channel which transition occurs and then storing new received signaling bits;
- and
- a fifth step of either receiving a next block of the block being processed in the third step when the block in the third step is not in the first interrupted state and then returning to the first step, receiving the next block of the block being processed in the fourth step and returning to the first step, or proceeding to an end when the next block is a last block.
A different signaling converter, comprising:
- an input signaling bit state analyzing means (10) for receiving the signaling bits of each channel, comparing a new received signaling bit(s) with a previous received signaling bit(s), and for generating an interrupt to a CPU when a transition of signaling bit(s) occurs;
- and
- a signaling bit storage and conversion means (20) connected to the input signaling bit state analyzing means (10) for storing a new signaling bit state inputted from the input signaling bit state analyzing means (10), converting signaling bit(s), and transmitting a signaling code of a converted state.
Dependencies are inferred from the claim text.