GB2111348B - V.f. receivers for use in digital switching systems - Google Patents

V.f. receivers for use in digital switching systems

Info

Publication number
GB2111348B
GB2111348B GB08134147A GB8134147A GB2111348B GB 2111348 B GB2111348 B GB 2111348B GB 08134147 A GB08134147 A GB 08134147A GB 8134147 A GB8134147 A GB 8134147A GB 2111348 B GB2111348 B GB 2111348B
Authority
GB
United Kingdom
Prior art keywords
receivers
switching systems
digital switching
digital
systems
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.)
Expired
Application number
GB08134147A
Other versions
GB2111348A (en
Inventor
Si Lam Ping
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.)
Plessey Co Ltd
Original Assignee
Plessey 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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB08134147A priority Critical patent/GB2111348B/en
Publication of GB2111348A publication Critical patent/GB2111348A/en
Application granted granted Critical
Publication of GB2111348B publication Critical patent/GB2111348B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/448—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency with conversion of a single frequency signal into a digital signal
    • H04Q1/4485—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency with conversion of a single frequency signal into a digital signal which is transmitted in digital form

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Time-Division Multiplex Systems (AREA)
GB08134147A 1981-11-12 1981-11-12 V.f. receivers for use in digital switching systems Expired GB2111348B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08134147A GB2111348B (en) 1981-11-12 1981-11-12 V.f. receivers for use in digital switching systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08134147A GB2111348B (en) 1981-11-12 1981-11-12 V.f. receivers for use in digital switching systems

Publications (2)

Publication Number Publication Date
GB2111348A GB2111348A (en) 1983-06-29
GB2111348B true GB2111348B (en) 1985-06-12

Family

ID=10525828

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08134147A Expired GB2111348B (en) 1981-11-12 1981-11-12 V.f. receivers for use in digital switching systems

Country Status (1)

Country Link
GB (1) GB2111348B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4519072A (en) * 1982-11-10 1985-05-21 Rockwell International Corporation Answer supervision system
JPS62204652A (en) * 1986-03-04 1987-09-09 Nec Corp Audible frequency signal identification system
KR100258150B1 (en) * 1997-05-29 2000-06-01 윤종용 Method and circuit for channel assign trunk line test in rf communication system

Also Published As

Publication number Publication date
GB2111348A (en) 1983-06-29

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee