Abstract:
본 발명은 전화망 방향제거 장치 및 방법에 관한 것으로, 기존 상용 반향제거의 복잡한 중계선 인터페이스ghl호, 시그날링 인터페이스회로, 디스에이블링회로 등이 필요없고, 반향제거가 필요한 중계선이 24채널을 수용하는 T1방식(1.544Mbps)과 32채널인 (2.048Mbps)중 어떤 방식을 사용하더라도 관계없으며, 즉 중계선의 방식에 상관없이 타임스위치와 연동하여 동작할수 있는 반향제거기를 실현할 수 있어서 경계적이 반향제거기를 구성할수 있다. 또한, 중계선상에 위치하지 않으므로서 중계선의 신뢰도를 저하시키지 않고, 반향제거가 필요한 때만 타임스위치와 연동시켜 반향제거를 하므로서, 상대적으로 적은 반향제거기를 가지고 효율적으로 반향제거를 할수 있어서 경제적이고, 또한 반향제거기와 타임스위치가 연동되어 반형제거를 수행하므로서 반향제거기를 중계선 채널 위치에 관계없이 스위치 제어 프로세서의소프트웨어에 의한 임의 배정이 가능하기 때문에 반향제거기의 고장에 신축적으로 대처할 수 있고, N+1 리던던스(Rrdundance)등으로 전체적인 시스템 신뢰도 향상이 가능하도록 하는 효과가 있다.
Abstract:
A time switch communication path test command is received from a processor, and then, tests are performed on the normality of a testing and maintenance means (TTMA) and a control memory (TCMA). If they are normal, the operation proceeds, while if any one of them is abnormal, the abnormality is reported to a higher level. A testing line for the test of the comuncation path of the time switch unit is set in the control memory (TCMA), and the test pattern is transmitted through a testing line by controlling the testing and maintenance means (TTMA) and the control memory (TCMA). Then tests are carried out, and the test results are reported to a higher level.
Abstract:
The switch includes a plurality of second time switches (T0'- Tn'-1) which are so formed as to diplex each of first time switches (T-0Tn-1). A first diplexing means puts the first and second time switches in an active or standby position, and shifts them automatically when the status changes. Effective data bits are allocated on the first and second time switches and data links during the transmission of the between them, and the effective bits are monitored, thereby selecting a turned-on data from an appratus having the normal status. With the switch, the reliability of the apparatus is improved.
Abstract:
The time switch interchanges 4096 time slots by making the clock frequency to be 8.192 MHz. The time switch includes a first and a second double port SRAM (1,2) having address moudles (AL,AR) for storing the audio information data on the corresponding addresses by time slot units, a control memory (3) for sending read address signal to the address module (AR), and a timing circuit (4) for sending write address signal to the address module (AL). The speed of the clock signal transmitted from the timing circuit to the address module (AL) is 8.192 MHz. The data reading from the SRAM (1,2) is sequencial process but the data writing on the RAM is random process.