UNITED STATES DEPARTMENT OF AGRICULTURE
Rural Electrification Administration
BULLETIN 1751H-405
SUBJECT: Digital Transmission Systems
TO: REA Telephone Borrowers
REA Telephone Staff
EFFECTIVE DATE: Date of Approval
EXPIRATION DATE: Seven years from the effective date
OFFICE OF PRIMARY INTEREST: Transmission Branch, Telecommunications Standards Division
PREVIOUS INSTRUCTIONS: This Bulletin replaces the following Bulletin and Telecommunications Engineering and Construction Manual (TE&CM) Sections:
Bulletin 1751H-405, Digital Span Lines
TE&CM Section 954, Digital Terminals & Multiplexers
TE&CM Section 958, Digital Cross-Connect & Drop & Insert Systems
FILING INSTRUCTIONS: Discard the following Bulletin and TE&CM Sections and replace with this Bulletin:
Bulletin 1751H-405, Digital Span Lines
TE&CM Section 954, Digital Terminals & Multiplexers
TE&CM Section 958, Digital Cross-Connect & Drop & Insert Systems
Also file along with 7 CFR 1751 and on REANET.
PURPOSE: To provide information on digital transmission systems, including a description of system components and basic guidelines for the design of transmission systems. The document assumes the reader is familiar with the topics of basic telephony and digital transmission. All information in this bulletin is advisory.
Wally Beyer 5/5/94
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Administrator Date