JPS5657383A - Continuity test system of called subscriber circuit - Google Patents
Continuity test system of called subscriber circuitInfo
- Publication number
- JPS5657383A JPS5657383A JP13264479A JP13264479A JPS5657383A JP S5657383 A JPS5657383 A JP S5657383A JP 13264479 A JP13264479 A JP 13264479A JP 13264479 A JP13264479 A JP 13264479A JP S5657383 A JPS5657383 A JP S5657383A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- called subscriber
- test pattern
- subscriber circuit
- continuity test
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/24—Arrangements for supervision, monitoring or testing with provision for checking the normal operation
- H04M3/244—Arrangements for supervision, monitoring or testing with provision for checking the normal operation for multiplex systems
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Abstract
PURPOSE:To facilitate an easy continuity test of the called subscriber circuit, by forming a digital loop in the called subscriber circuit by means of the ringing tone control signal. CONSTITUTION:The pad switch memory PSM can read and send the test pattern via the switch PSW and by the command of the central control unit CC after storing the form signal of the test pattern at its own part. The test pattern signal is sent to the called subscriber circuit LC through the time switch TSW and then returned at the digital loop circuit to reach the calling subscriber via the multiplex MPX and the switch TSW. Thus the time slot is sampled at the dropper D to be sent to the check circuit. Accordingly, no test pattern signal generating circuit is required in that case. Thus a continuity test is given simultaneously with transmission of the ringing tone, thus simplifying the timing process.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13264479A JPS5657383A (en) | 1979-10-15 | 1979-10-15 | Continuity test system of called subscriber circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13264479A JPS5657383A (en) | 1979-10-15 | 1979-10-15 | Continuity test system of called subscriber circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5657383A true JPS5657383A (en) | 1981-05-19 |
JPS6155318B2 JPS6155318B2 (en) | 1986-11-27 |
Family
ID=15086135
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13264479A Granted JPS5657383A (en) | 1979-10-15 | 1979-10-15 | Continuity test system of called subscriber circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5657383A (en) |
-
1979
- 1979-10-15 JP JP13264479A patent/JPS5657383A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6155318B2 (en) | 1986-11-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5657383A (en) | Continuity test system of called subscriber circuit | |
JPS5556753A (en) | Emergency informing system | |
JPS54118107A (en) | Automatic dial device | |
JPS55165063A (en) | Facsimile communication system | |
JPS57212856A (en) | Terminal adaptor system | |
ES476875A1 (en) | Ringing circuit for centrally controlled telephone exchange junction - has alternating signal source, and bipolar electronic switch output connected to subscriber and timer | |
JPS5423309A (en) | Data communication circuit of double-current loop | |
FR2427750A1 (en) | TELEPHONE TAXATION PULSE TRANSMISSION DEVICE FROM A CENTRAL TO A SUBSCRIBER STATION | |
JPS5742230A (en) | Clock switching device | |
JPS5673954A (en) | Extension callout system in button telephone device | |
JPS5338912A (en) | Sending/stop system for signal sound | |
JPS56128053A (en) | Control unit of telephone set by sequential counter | |
JPS55138934A (en) | Talking control method | |
JPS5792959A (en) | System for terminal test | |
JPS5210007A (en) | Delayed operation circuit for telephone call signal | |
JPS5657376A (en) | Control system for digital transmission loss insertion | |
JPS52104005A (en) | Circuit changeover device which possesses roopback function | |
JPS5521667A (en) | Communication path control unit in time sharing exchanger | |
JPS5340206A (en) | Subscriber scanning system | |
JPS5660158A (en) | Audible signal tone system | |
JPS57162868A (en) | Data terminal device | |
JPS5216249A (en) | Test system for line and subscriber call meter | |
JPS55125740A (en) | Selective calling system for radio link | |
JPS55105491A (en) | Data exchange system | |
JPS56131249A (en) | Mischievous call recording system |