JPS57118450A - Pcm-fdm mutual converter - Google Patents

Pcm-fdm mutual converter

Info

Publication number
JPS57118450A
JPS57118450A JP372381A JP372381A JPS57118450A JP S57118450 A JPS57118450 A JP S57118450A JP 372381 A JP372381 A JP 372381A JP 372381 A JP372381 A JP 372381A JP S57118450 A JPS57118450 A JP S57118450A
Authority
JP
Japan
Prior art keywords
pcm
circuit
channel
chi
primary group
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.)
Pending
Application number
JP372381A
Other languages
Japanese (ja)
Inventor
Tokuhiro Kawakami
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP372381A priority Critical patent/JPS57118450A/en
Publication of JPS57118450A publication Critical patent/JPS57118450A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J4/00—Combined time-division and frequency-division multiplex systems
    • H04J4/005—Transmultiplexing

Abstract

PURPOSE:To have the mutual connection among the channels excepting a branching circuit without lowering the circuit quality, by performing the branching and inserting of an optional channel signal at the stage of the PCM primary group signal frame of a PCM-FDM mutual converter. CONSTITUTION:A branching circuit 18 extracts a channel CHi for example out of the output signal (PCM primary group pulse train) of a channel converting circuit 6 and sends it to a PCM channel circuit 20. A pulse train equivalent to a non-call state is previously inserted to the position of the PCM primary group pulse train of the branched CHi. On the other hand, the signal of the non-call state is transmitted to a time slot corresponding to the CHi with every PCM primary pulse which is supplied through a PCM primary group input terminal 9 and with the frame synchronization set up by a PCM synchronous circuit 11. An inserting circuit 19 inserts the PCM signals equivalent to a circuit sent from the circuit 20 to the time slot of CHi and delivers the PCM primary group pulse train to apply it to a channel converting circuit 12.
JP372381A 1981-01-16 1981-01-16 Pcm-fdm mutual converter Pending JPS57118450A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP372381A JPS57118450A (en) 1981-01-16 1981-01-16 Pcm-fdm mutual converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP372381A JPS57118450A (en) 1981-01-16 1981-01-16 Pcm-fdm mutual converter

Publications (1)

Publication Number Publication Date
JPS57118450A true JPS57118450A (en) 1982-07-23

Family

ID=11565204

Family Applications (1)

Application Number Title Priority Date Filing Date
JP372381A Pending JPS57118450A (en) 1981-01-16 1981-01-16 Pcm-fdm mutual converter

Country Status (1)

Country Link
JP (1) JPS57118450A (en)

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