GB/T 7623-1987Automatic answering equipment and/or parallel automatic calling equipment on the general switched telephone network, including procedures for disabling of echocontrol devices for both manually and automatically est (English PDF)
This is a limited preview
Buy now to download the full PDF (7 pages)
Need quotation for your management?
Get a formal quotation for GB/T 7623-1987 in 30 minutes.
Issued by
National Bureau of Standards
Level / Type
National · Recommended
Issue date
April 3, 1987
Implementation date
November 1, 1987
Scope
GB/T 7623-1987 (Automatic answering equipment and/or parallel automatic calling equipment on the general switched telephone network, including procedures for disabling of echocontrol devices for both manually and automatically est) is available as an English-translated PDF.
GB/T 7623-1987 — This standard specifies the automatic answering device and (or) parallel automatic calling equipment to establish a data connection.
Found what you need?
Document preview — GB/T 7623-1987
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 specifies the automatic answering device and (or) parallel automatic calling equipment to establish a data connection.
Document data
International classification (ICS): 33.040.60.
Chinese classification (CCS): M32.
Estimated length of the Chinese original: 10,121 words.
Adopted international standard: CCITT V.25-1984, MOD.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 7 pages — is available in the English PDF.
Referenced standards
How to Download GB/T 7623-1987
- 1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
- 2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
- 3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
- 4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.
Related Standards
GB/T 38198-2026 — Format requirements for panchromatic and multispectral data products from land observation satellites
GB/T 19203-2026 — Determination of calcium, magnesium and sulphur content in compound fertilizers
GB/T 38725.3-2026 — Spoolable reinforced plastic pipe — Part 3: Steel reinforced thermoplastic coiled pipe
Secure payment via Stripe
Payments accepted
GB/T 7623-1987
$135.00