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