1、 TIA STANDARD ANSI/TIA/EIA-561-1990 Approved: March 20, 1990 Reaffirmed: December 10, 1998 Reaffirmed: May 20, 2003 Simple 8-Position Non-Synchronous Interface Between Data Terminal Equipment and Data Circuit-Terminating Equipment Employing Serial Binary Data Interchange TIA-561 OCTOBER 1990 TELECOM
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8、2-RF2, formulated under the cognizance of the TIA TR-30.2 Subcommittee on DTE-DCE Interfaces and Protocols.) This Document was reaffirmed by the American National Standards Institute (ANSI) on May 20, 2003 and by the TIA. Published by TELECOMMUNICATIONS INDUSTRY ASSOCIATION 1990 Standards and Techno
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24、704 U.S.A. or call U.S.A. and Canada 1-800-854-7179, International (303) 397-7956 Copyright Electronic Industries Alliance Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. EIX/TIA-SGl CONTENTS i . SCOPE i 1.1 GENERAL 1 1.2 CON
25、NECTION . i 1.3 BITSEQUENCES i 1.4 DATA SIGNALING RATES . i 2 . INTERFACE MECHANICAL CHARACTERISTICS 2 2.1 POINT OF INTERFACE 2 2.2 INTERFACE CONNECTOR . 2 2.3 CONNECTOR CONTACT ASSIGNMENTS 7 3.1 GENERAL 8 3.2 CLASSIFICATION OF CIRCUITS . 8 3.3 SIGNAL CHARACTERISTICS, GENERAL 9 3.4 DEFINITIONS OF IN
26、TERCHANGE CIRCUITS 9 . 1.5 NON-SYNCHRONOUSCOMMUNICATION . 1 3 . FUNCTIONAL DESCRIPTIONS OF THE INTERCHANGE CIRCUITS 8 LIST OF FIGURES Figure 2.1 . 2 Figure 2.2 . 3 Figure 2.3 . 3 Figure 2.4 . 4 Figure 2.5 . 5 Figure 2.6 . 6 Figure 2.7 . 7 Figure 3.1 . 8 Copyright Electronic Industries Alliance Provi
27、ded by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,- STD-EIA TIA-5bL-ENGL 1970 M 3234b00 Ob14570 121 EIA/TIA-561 Page i SECTION ONE 1. SCOPE 1.1 GENERAL This Standard is applicable to the interconnection of data terminating equipment (D
28、TE) and data circuit-terminating equipment (DCE) employing serial binary data interchange where a minimal number of control and information circuits are required. It defines: Section i - Scope Section 2 - Interface Mechanical Characteristics Section 3 - Functional Description of the Interchange Circ
29、uits The electrical characteristics applicable to this interface can be found in AMERICAN NATIONAL STANDARD ANSI/EIA/TIA-562. 1.2 CONNECTION When used in conjunction with the above mentioned electrical characteristics standard, this Standard applies where equipment on one side of the DTE/DCE interfa
30、ce is intended for connection directly to the other side without additional technical considerations. 1.3 BIT SEQUENCES This Standard applies to data communication systems where data is bit serialieed by the DTE and the DCE and places no restrictions on the arrangement or the sequence of bits. 1.4 D
31、ATA SIGNALING RATES This Standard is applicable for use at data signaling rates at or below 38.4 kbitfs. Equipments complying with this Standard, however, need not operate over this entire signaling range. They may be designed to operate over a more narrow range as appropriate for the specific appli
32、cation. 1.5 NON-SYNCHRONOUS COMMUNICATION This Standard applies to non-synchronous serial binary data communication systems. 1.6 CLASSES OF SERVICE This Standard applies to duplex switched, non-switched, dedicated, leased or private line service, either two-wire or four-wire. Copyright Electronic In
33、dustries Alliance Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-EIA/TIAdBl Page 2 SECTION TWO 2. MTEBXACE MECHANICAL CHARACTERISTICS a.1 POINT OF INTERFACE The interface between the DTE and the DOE is located at a pluggable c
34、onnector signal interface point between the two equipments (see Figure 2.1). An hin-*0a Pig in these cases the ON condition on Circuit 125 may be in response to these predefmed ringing signals. The operation of this circuit shall not be disabled by an OFF condition on Circuit 108/2 (DTE Ready). The
35、DTE may decline to answer a call by not placing an ON condition on Circuit 108/2 in response to 125 cycling. Copyright Electronic Industries Alliance Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STDSEIA TIA-SbL-ENGL 1970 323
36、4b00 ObL9bO1 837 m EIA/TIA-561 Page 12 Circuit ISS-Ready for Receiving Direction: To the DCE This circuit is used to control the transfer of data on Circuit 104 (Received Data) when an intermediate function such as error control is being used in the DCE. The ON condition on Circuit 133 indicates tha
37、t the DTE is capable of receiving data. The OFF condition indicates that the DTE is not capable of receiving data and causes the DCE, or the intermediate function, to retain the data. In some DCEs the OFF condition on Circuit 133 niay also cause a signal to be transmitted to the distant DCE causing
38、an OFF condition to be placed on Circuit 106 (Clear to Send) extending the flow control to the distant DTE. . Copyright Electronic Industries Alliance Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Copyright Electronic Industries Alliance Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
