GB1301675A - - Google Patents

Info

Publication number
GB1301675A
GB1301675A GB1301675DA GB1301675A GB 1301675 A GB1301675 A GB 1301675A GB 1301675D A GB1301675D A GB 1301675DA GB 1301675 A GB1301675 A GB 1301675A
Authority
GB
United Kingdom
Prior art keywords
channel
attenuator
oct
whilst
filter
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
Other languages
English (en)
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 filed Critical
Publication of GB1301675A publication Critical patent/GB1301675A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H04M9/10—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic with switching of direction of transmission by voice frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
GB1301675D 1969-10-28 1969-10-28 Expired GB1301675A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5274469 1969-10-28

Publications (1)

Publication Number Publication Date
GB1301675A true GB1301675A (enrdf_load_stackoverflow) 1973-01-04

Family

ID=10465119

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1301675D Expired GB1301675A (enrdf_load_stackoverflow) 1969-10-28 1969-10-28

Country Status (1)

Country Link
GB (1) GB1301675A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2246055A (en) * 1990-04-06 1992-01-15 Bsb Electronics Limited Duplex audio communication system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2246055A (en) * 1990-04-06 1992-01-15 Bsb Electronics Limited Duplex audio communication system

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees