Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Auto-answer circuit design for an Anderson Jacobson AD 342 modem /
Author Fleck, David C. ; Fleck., David C.
CORP Author Environmental Monitoring and Support Lab.-Cincinnati, Ohio.
Publisher Environmental Protection Agency, Office of Research and Development, Environmental Monitoring and Support Laboratory ; For sale by the National Technical Information Service,
Year Published 1978
Report Number EPA 600-4-78-026
Stock Number 22161
OCLC Number 04161402
ISBN pbk.
Subjects Modems.
Additional Subjects Coupling circuits ; Automatic control equipment ; Modems ; Data links ; Design ; Data transmission ; Couplers ; Answering circuits
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJAD  EPA 600/4-78-026 Region 3 Library/Philadelphia, PA 01/28/2000
EJBD ARCHIVE EPA 600-4-78-026 Headquarters Library/Washington,DC 11/13/2012
EJBD  EPA 600-4-78-026 c.1 Headquarters Library/Washington,DC 11/15/2012
ESAD  EPA 600-4-78-026 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-284 292 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation v, 17 p. : ill. ; 27 cm.
The report describes a circuit which connects a Western Electric Model 1001F Data Accessing Arrangement to an Anderson Jacobson Model AD 342 Modem. It automatically answers the phone and holds a data connection as long as a received carrier is present. It self resets upon loss of carrier, allowing further incoming calls to be answered. It also disconnects and resets if no carrier is received within ten seconds after answering. In addition, the circuit allows for easy origination of calls to other systems.
Issued May 1978.