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GB/T 9540-1988Wideband modem for synchronous data transmission at a data signalling rate higher than 72 kbit/s using 60～108kHz group band circuits (English PDF)

同步数据传输数据信号速率高于72千比特/秒使用60？108 kHz 基群电路的宽带调制解调器

GB/T 9540 | Evolution and historical versions

Std ID	Title	Status
GB/T 9540-1988	Wideband modem for synchronous data transmission at a data signalling rate higher than 72 kbit/s using 60～108kHz group band circuits	Obsolete

GB/T 9540-1988 is obsolete. This page sells the obsolete edition, for projects and contracts that still cite it.

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Issued by

Ministry of Industry and Information Technology of the People's Republic of China

Level / Type

National · Recommended

Issue date

June 30, 1988

Implementation date

February 1, 1989

Scope

GB/T 9540-1988 is the English-translated version of 同步数据传输数据信号速率高于72千比特/秒使用60？108 kHz 基群电路的宽带调制解调器.

GB/T 9540-1988 is the Chinese national standard "Wideband modem for synchronous data transmission at a data signalling rate higher than 72 kbit/s using 60～108kHz group band circuits".

It was issued on June 30, 1988 by the Ministry of Industry and Information Technology of the People's Republic of China, and took effect on February 1, 1989. It is obsolete: it has been withdrawn (abolished on October 14, 2005).

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Document preview — GB/T 9540-1988

National Standard of the People's Republic of China

Issued by: Ministry of Industry and Information Technology of the People's Republic of China

Document data

1 Document data

Sector: National standard (Recommended).

Issuing body: Ministry of Industry and Information Technology of the People's Republic of China.

Date of issue: 1988-06-30.

Date of implementation: 1989-02-01.

Status: obsolete, withdrawn on 2005-10-14.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — all pages — is available in the English PDF.

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