YD/T 637-1993Communication with the DC - DC conversion equipment (English PDF)
通信用直流-直流交换设备
YD/T 637 | Evolution and historical versions
| Std ID | Title | Status |
|---|---|---|
| YD/T 637-2024 | DC-DC conversion equipment for telecommunication | Valid |
| YD/T 637-2006 | DC-DC Conversion Equiopment for Telecommunication | Obsolete |
| YD/T 637-1993 | Communication with the DC - DC conversion equipment | Obsolete |
YD/T 637-1993 is obsolete. It has been replaced by YD/T 637-2006. This page sells the obsolete edition, for projects and contracts that still cite it.
This is a limited preview
Buy now to download the full PDF
Need quotation for your management?
Get a formal quotation for YD/T 637-1993 in 30 minutes.
Issued by
Ministry of Posts and Telecommunications
Level / Type
National · Recommended
Issue date
August 17, 1993
Implementation date
February 1, 1994
Scope
YD/T 637-1993 is the English-translated version of 通信用直流-直流交换设备.
YD/T 637-1993 is the Chinese industry standard "Communication with the DC - DC conversion equipment". It was issued on August 17, 1993 by the Ministry of Posts and Telecommunications, and took effect on February 1, 1994. It is obsolete: it has been replaced by YD/T 637-2006.
Found what you need?
Document preview — YD/T 637-1993
National Standard of the People's Republic of China
Issued by: Ministry of Posts and Telecommunications
Contents
- Document data
1 Document data
Sector: Telecom (industry standard).
Issuing body: Ministry of Posts and Telecommunications.
Date of issue: 1993-08-17.
Date of implementation: 1994-02-01.
Status: obsolete, replaced by YD/T 637-2006.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — all pages — is available in the English PDF.
How to Download YD/T 637-1993
- 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
YD/T 1114-2026 — Halogen-free flame retardant optical fibre cable
YD/T 1181.1-2026 — Characteristics of non-metal reinforcement used for optical fiber cables - Part 1: Glass fiber reinforced plastic rods
YD/T 1181.3-2026 — Characteristics of non-metal reinforcement for optical fiber cables - Part 3: aramid fiber reinforced plastic rods
Secure payment via Stripe
Payments accepted
YD/T 637-1993
$369.00