GB/T 7620-1987300 bits per second duplex modem standardized for use in the general switched telephone network (English PDF)
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Issued by
National Bureau of Standards
Level / Type
National · Recommended
Issue date
April 3, 1987
Implementation date
November 1, 1987
Scope
GB/T 7620-1987 (300 bits per second duplex modem standardized for use in the general switched telephone network) is available as an English-translated PDF.
GB/T 7620-1987 — This standard uses a CCITT CCITT Recommendation V. 21 (1984) "Standardization in the general switched telephone network using 300 bit/s full-duplex modem. "
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Document preview — GB/T 7620-1987
National Standard of the People's Republic of China
- ICS
- 33.040.60
- Classification
- M 32
Issued by: National Bureau of Standards
Contents
- What this standard covers1
- Document data2
What this standard covers
This standard uses a CCITT CCITT Recommendation V. 21 (1984) "Standardization in the general switched telephone network using 300 bit/s full-duplex modem. "
Document data
International classification (ICS): 33.040.60.
Chinese classification (CCS): M32.
Estimated length of the Chinese original: 5,585 words.
Adopted international standard: CCITT V.21-1984, MOD.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 4 pages — is available in the English PDF.
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