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DRAFT STANDARD
Network Working Group                                         B. StewartRequest for Comments: 1659                                  Xyplex, Inc.Obsoletes:1317                                                July 1994Category: Standards TrackDefinitions of Managed Objects for RS-232-like Hardware Devicesusing SMIv2Status of this Memo   This document specifies an Internet standards track protocol for the   Internet community, and requests discussion and suggestions for   improvements.  Please refer to the current edition of the "Internet   Official Protocol Standards" (STD 1) for the standardization state   and status of this protocol.  Distribution of this memo is unlimited.Table of Contents1. Introduction ................................................12. The SNMPv2 Network Management Framework .....................12.1 Object Definitions .........................................23. Overview ....................................................23.1 Relationship to Interface MIB ..............................34. Definitions .................................................35. Acknowledgements ............................................206. References ..................................................207. Security Considerations .....................................218. Author's Address ............................................211.  Introduction   This memo defines an extension to the Management Information Base   (MIB) for use with network management protocols in the Internet   community.  In particular, it defines objects for the management of   RS-232-like devices.2.  The SNMPv2 Network Management Framework   The SNMPv2 Network Management Framework consists of four major   components.  They are:      oRFC 1442 [1] which defines the SMI, the mechanisms used for           describing and naming objects for the purpose of management.      o    STD 17,RFC 1213 [2] defines MIB-II, the core set of managed           objects for the Internet suite of protocols.Stewart                                                         [Page 1]

RFC 1659                    RS-232-like MIB                    July 1994      oRFC 1445 [3] which defines the administrative and other           architectural aspects of the framework.      oRFC 1448 [4] which defines the protocol used for network           access to managed objects.   The Framework permits new objects to be defined for the purpose of   experimentation and evaluation.2.1.  Object Definitions   Managed objects are accessed via a virtual information store, termed   the Management Information Base or MIB.  Objects in the MIB are   defined using the subset of Abstract Syntax Notation One (ASN.1)   defined in the SMI.  In particular, each object object type is named   by an OBJECT IDENTIFIER, an administratively assigned name.  The   object type together with an object instance serves to uniquely   identify a specific instantiation of the object.  For human   convenience, we often use a textual string, termed the descriptor, to   refer to the object type.3.  Overview   The RS-232-like Hardware Device MIB applies to interface ports that   might logically support the Interface MIB, a Transmission MIB, or the   Character MIB.  The most common example is an RS-232 port with modem   signals.   The RS-232-like Hardware Device MIB is mandatory for all systems that   have such a hardware port supporting services managed through some   other MIB.   The MIB includes multiple similar types of hardware, and as a result   contains objects not applicable to all of those types.  The   compliance definitions herein thus have a general group for all   implementations, and separate groups for the different types of   ports, such as asynchronous and synchronous.   The RS-232-like Hardware Port MIB includes RS-232, RS-422, RS-423,   V.35, and other asynchronous or synchronous, serial physical links   with a similar set of control signals.   The MIB contains objects that relate to physical layer connections.   Such connections may provide interesting hardware signals (other than   for basic data transfer), such as RNG and DCD.  Hardware ports also   have such attributes as speed and bits per character.Stewart                                                         [Page 2]

RFC 1659                    RS-232-like MIB                    July 1994   The MIB comprises one base object and four tables, detailed in the   following sections.  The tables contain objects for all ports,   asynchronous ports, and input and output control signals.3.1.  Relationship to Interface MIB   The RS-232-like MIB is one of many MIBs designed for layered use as   described in the Interface MIB [5].  In most implementations where it   is present, it will be in the lowest interface sublayer, that is, the   RS-232-like MIB represents the physical layer, providing service to   higher layers such as the Character MIB [6] or PPP MIB [7].   The Interface MIB's ifTestTable and ifRcvAddressTable are not   relevant to the RS-232-like MIB.   The RS-232-like MIB is relevant for ifType values rs232(33), v35(45),   and perhaps others.   The RS-232-like MIB requires the conformance groups ifGeneralGroup,   and ifFixedLengthGroup.   The value of ifSpeed is the same as rs232PortOutSpeed.   Usefulness of error counters in this MIB depends on the octet   counters in ifFixedLengthGroup.4.  Definitions   RS-232-MIB DEFINITIONS ::= BEGIN   IMPORTS       MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE,       Counter32, Integer32           FROM SNMPv2-SMI       InterfaceIndex           FROM IF-MIB       transmission           FROMRFC1213-MIB       MODULE-COMPLIANCE, OBJECT-GROUP           FROM SNMPv2-CONF;   rs232 MODULE-IDENTITY       LAST-UPDATED "9405261700Z"       ORGANIZATION "IETF Character MIB Working Group"       CONTACT-INFO               "        Bob Stewart                Postal: Xyplex, Inc.Stewart                                                         [Page 3]

RFC 1659                    RS-232-like MIB                    July 1994                        295 Foster Street                        Littleton, MA 01460                   Tel: 508-952-4816                   Fax: 508-952-4887                E-mail: rlstewart@eng.xyplex.com"       DESCRIPTION               "The MIB module for RS-232-like hardware devices."       ::= { transmission 33 }   -- Generic RS-232-like information   rs232Number OBJECT-TYPE       SYNTAX Integer32       MAX-ACCESS read-only       STATUS current       DESCRIPTION           "The number of ports (regardless of their current           state) in the RS-232-like general port table."       ::= { rs232 1 }   -- RS-232-like General Port Table   rs232PortTable OBJECT-TYPE       SYNTAX SEQUENCE OF Rs232PortEntry       MAX-ACCESS not-accessible       STATUS current       DESCRIPTION           "A list of port entries.  The number of entries is           given by the value of rs232Number."       ::= { rs232 2 }   rs232PortEntry OBJECT-TYPE       SYNTAX Rs232PortEntry       MAX-ACCESS not-accessible       STATUS current       DESCRIPTION           "Status and parameter values for a port."       INDEX { rs232PortIndex }       ::= { rs232PortTable 1 }   Rs232PortEntry ::=       SEQUENCE {           rs232PortIndex               InterfaceIndex,           rs232PortTypeStewart                                                         [Page 4]

RFC 1659                    RS-232-like MIB                    July 1994               INTEGER,           rs232PortInSigNumber               Integer32,           rs232PortOutSigNumber               Integer32,           rs232PortInSpeed               Integer32,           rs232PortOutSpeed               Integer32,           rs232PortInFlowType               INTEGER,           rs232PortOutFlowType               INTEGER       }   rs232PortIndex OBJECT-TYPE       SYNTAX InterfaceIndex       MAX-ACCESS read-only       STATUS current       DESCRIPTION           "The value of ifIndex for the port.  By convention           and if possible, hardware port numbers map directly           to external connectors.  The value for each port must           remain constant at least from one re-initialization           of the network management agent to the next."       ::= { rs232PortEntry 1 }   rs232PortType OBJECT-TYPE       SYNTAX INTEGER { other(1), rs232(2), rs422(3),                        rs423(4), v35(5), x21(6) }       MAX-ACCESS read-only       STATUS current       DESCRIPTION           "The port's hardware type."       ::= { rs232PortEntry 2 }   rs232PortInSigNumber OBJECT-TYPE       SYNTAX Integer32       MAX-ACCESS read-only       STATUS current       DESCRIPTION           "The number of input signals for the port in the           input signal table (rs232PortInSigTable).  The table           contains entries only for those signals the software           can detect and that are useful to observe."       ::= { rs232PortEntry 3 }Stewart                                                         [Page 5]

RFC 1659                    RS-232-like MIB                    July 1994   rs232PortOutSigNumber OBJECT-TYPE       SYNTAX Integer32       MAX-ACCESS read-only       STATUS current       DESCRIPTION           "The number of output signals for the port in the           output signal table (rs232PortOutSigTable).  The           table contains entries only for those signals the           software can assert and that are useful to observe."       ::= { rs232PortEntry 4 }   rs232PortInSpeed OBJECT-TYPE       SYNTAX Integer32       MAX-ACCESS read-write       STATUS current       DESCRIPTION           "The port's input speed in bits per second.  Note that           non-standard values, such as 9612, are probably not allowed           on most implementations."       ::= { rs232PortEntry 5 }   rs232PortOutSpeed OBJECT-TYPE       SYNTAX Integer32       MAX-ACCESS read-write       STATUS current       DESCRIPTION           "The port's output speed in bits per second.  Note that           non-standard values, such as 9612, are probably not allowed           on most implementations."       ::= { rs232PortEntry 6 }   rs232PortInFlowType OBJECT-TYPE       SYNTAX INTEGER { none(1), ctsRts(2), dsrDtr(3) }       MAX-ACCESS read-write       STATUS current       DESCRIPTION           "The port's type of input flow control.  'none'           indicates no flow control at this level.           'ctsRts' and 'dsrDtr' indicate use of the indicated           hardware signals."       ::= { rs232PortEntry 7 }   rs232PortOutFlowType OBJECT-TYPE       SYNTAX INTEGER { none(1), ctsRts(2), dsrDtr(3) }       MAX-ACCESS read-write       STATUS current       DESCRIPTION           "The port's type of output flow control.  'none'Stewart                                                         [Page 6]

RFC 1659                    RS-232-like MIB                    July 1994           indicates no flow control at this level.           'ctsRts' and 'dsrDtr' indicate use of the indicated           hardware signals."       ::= { rs232PortEntry 8 }   -- RS-232-like Asynchronous Port Table   rs232AsyncPortTable OBJECT-TYPE       SYNTAX SEQUENCE OF Rs232AsyncPortEntry       MAX-ACCESS not-accessible       STATUS current       DESCRIPTION           "A list of asynchronous port entries.  Entries need           not exist for synchronous ports."       ::= { rs232 3 }   rs232AsyncPortEntry OBJECT-TYPE       SYNTAX Rs232AsyncPortEntry       MAX-ACCESS not-accessible       STATUS current       DESCRIPTION           "Status and parameter values for an asynchronous           port."       INDEX { rs232AsyncPortIndex }       ::= { rs232AsyncPortTable 1 }   Rs232AsyncPortEntry ::=       SEQUENCE {           rs232AsyncPortIndex               InterfaceIndex,           rs232AsyncPortBits               INTEGER,           rs232AsyncPortStopBits               INTEGER,           rs232AsyncPortParity               INTEGER,           rs232AsyncPortAutobaud               INTEGER,           rs232AsyncPortParityErrs               Counter32,           rs232AsyncPortFramingErrs               Counter32,           rs232AsyncPortOverrunErrs               Counter32       }Stewart                                                         [Page 7]

RFC 1659                    RS-232-like MIB                    July 1994   rs232AsyncPortIndex OBJECT-TYPE       SYNTAX InterfaceIndex       MAX-ACCESS read-only       STATUS current       DESCRIPTION           "A unique value for each port.  Its value is the           same as rs232PortIndex for the port."       ::= { rs232AsyncPortEntry 1 }   rs232AsyncPortBits OBJECT-TYPE       SYNTAX INTEGER (5..8)       MAX-ACCESS read-write       STATUS current       DESCRIPTION           "The port's number of bits in a character."       ::= { rs232AsyncPortEntry 2 }   rs232AsyncPortStopBits OBJECT-TYPE       SYNTAX INTEGER { one(1), two(2),                        oneAndHalf(3), dynamic(4) }       MAX-ACCESS read-write       STATUS current       DESCRIPTION           "The port's number of stop bits."       ::= { rs232AsyncPortEntry 3 }   rs232AsyncPortParity OBJECT-TYPE       SYNTAX INTEGER { none(1), odd(2), even(3),                        mark(4), space(5) }       MAX-ACCESS read-write       STATUS current       DESCRIPTION           "The port's sense of a character parity bit."       ::= { rs232AsyncPortEntry 4 }   rs232AsyncPortAutobaud OBJECT-TYPE       SYNTAX INTEGER { enabled(1), disabled(2) }       MAX-ACCESS read-write       STATUS current       DESCRIPTION           "A control for the port's ability to automatically           sense input speed.           When rs232PortAutoBaud is 'enabled', a port may           autobaud to values different from the set values for           speed, parity, and character size.  As a result a           network management system may temporarily observe           values different from what was previously set."Stewart                                                         [Page 8]

RFC 1659                    RS-232-like MIB                    July 1994       ::= { rs232AsyncPortEntry 5 }   rs232AsyncPortParityErrs OBJECT-TYPE       SYNTAX Counter32       MAX-ACCESS read-only       STATUS current       DESCRIPTION           "Total number of characters with a parity error,           input from the port since system re-initialization           and while the port state was 'up' or 'test'."       ::= { rs232AsyncPortEntry 6 }   rs232AsyncPortFramingErrs OBJECT-TYPE       SYNTAX Counter32       MAX-ACCESS read-only       STATUS current       DESCRIPTION           "Total number of characters with a framing error,           input from the port since system re-initialization           and while the port state was 'up' or 'test'."       ::= { rs232AsyncPortEntry 7 }   rs232AsyncPortOverrunErrs OBJECT-TYPE       SYNTAX Counter32       MAX-ACCESS read-only       STATUS current       DESCRIPTION           "Total number of characters with an overrun error,           input from the port since system re-initialization           and while the port state was 'up' or 'test'."       ::= { rs232AsyncPortEntry 8 }   -- RS-232-like Synchronous Port Table   rs232SyncPortTable OBJECT-TYPE       SYNTAX SEQUENCE OF Rs232SyncPortEntry       MAX-ACCESS not-accessible       STATUS current       DESCRIPTION           "A list of asynchronous port entries.  Entries need           not exist for synchronous ports."       ::= { rs232 4 }   rs232SyncPortEntry OBJECT-TYPE       SYNTAX Rs232SyncPortEntry       MAX-ACCESS not-accessible       STATUS currentStewart                                                         [Page 9]

RFC 1659                    RS-232-like MIB                    July 1994       DESCRIPTION           "Status and parameter values for a synchronous           port."       INDEX { rs232SyncPortIndex }       ::= { rs232SyncPortTable 1 }   Rs232SyncPortEntry ::=       SEQUENCE {           rs232SyncPortIndex               InterfaceIndex,           rs232SyncPortClockSource               INTEGER,           rs232SyncPortFrameCheckErrs               Counter32,           rs232SyncPortTransmitUnderrunErrs               Counter32,           rs232SyncPortReceiveOverrunErrs               Counter32,           rs232SyncPortInterruptedFrames               Counter32,           rs232SyncPortAbortedFrames               Counter32,           rs232SyncPortRole               INTEGER,           rs232SyncPortEncoding               INTEGER,           rs232SyncPortRTSControl               INTEGER,           rs232SyncPortRTSCTSDelay               Integer32,           rs232SyncPortMode               INTEGER,           rs232SyncPortIdlePattern               INTEGER,           rs232SyncPortMinFlags               Integer32       }   rs232SyncPortIndex OBJECT-TYPE       SYNTAX InterfaceIndex       MAX-ACCESS read-only       STATUS current       DESCRIPTION           "A unique value for each port.  Its value is the           same as rs232PortIndex for the port."       ::= { rs232SyncPortEntry 1 }Stewart                                                        [Page 10]

RFC 1659                    RS-232-like MIB                    July 1994   rs232SyncPortClockSource OBJECT-TYPE       SYNTAX INTEGER { internal(1), external(2), split(3) }       MAX-ACCESS read-write       STATUS current       DESCRIPTION           "Source of the port's bit rate clock. 'split' means           the tranmit clock is internal and the receive clock           is external."       ::= { rs232SyncPortEntry 2 }   rs232SyncPortFrameCheckErrs OBJECT-TYPE       SYNTAX Counter32       MAX-ACCESS read-only       STATUS current       DESCRIPTION           "Total number of frames with an invalid frame check           sequence, input from the port since system           re-initialization and while the port state was 'up'           or 'test'."       ::= { rs232SyncPortEntry 3 }   rs232SyncPortTransmitUnderrunErrs OBJECT-TYPE       SYNTAX Counter32       MAX-ACCESS read-only       STATUS current       DESCRIPTION           "Total number of frames that failed to be           transmitted on the port since system           re-initialization and while the port state was 'up'           or 'test' because data was not available to the           transmitter in time."       ::= { rs232SyncPortEntry 4 }   rs232SyncPortReceiveOverrunErrs OBJECT-TYPE       SYNTAX Counter32       MAX-ACCESS read-only       STATUS current       DESCRIPTION           "Total number of frames that failed to be received           on the port since system re-initialization and while           the port state was 'up' or 'test' because the           receiver did not accept the data in time."       ::= { rs232SyncPortEntry 5 }   rs232SyncPortInterruptedFrames OBJECT-TYPE       SYNTAX Counter32       MAX-ACCESS read-only       STATUS currentStewart                                                        [Page 11]

RFC 1659                    RS-232-like MIB                    July 1994       DESCRIPTION           "Total number of frames that failed to be received           or transmitted on the port due to loss of modem           signals since system re-initialization and while the           port state was 'up' or 'test'."       ::= { rs232SyncPortEntry 6 }   rs232SyncPortAbortedFrames OBJECT-TYPE       SYNTAX Counter32       MAX-ACCESS read-only       STATUS current       DESCRIPTION           "Number of frames aborted on the port due to           receiving an abort sequence since system           re-initialization and while the port state was 'up'           or 'test'."       ::= { rs232SyncPortEntry 7 }   rs232SyncPortRole OBJECT-TYPE       SYNTAX INTEGER  { dte(1), dce(2) }       MAX-ACCESS read-write       STATUS current       DESCRIPTION           "The role the device is playing that is using this port.              dte    means the device is performing the role of                     data terminal equipment              dce    means the device is performing the role of                     data circuit-terminating equipment."       DEFVAL { dce }       ::= { rs232SyncPortEntry 8 }   rs232SyncPortEncoding OBJECT-TYPE       SYNTAX INTEGER  { nrz(1), nrzi(2) }       MAX-ACCESS read-write       STATUS current       DESCRIPTION           "The bit stream encoding technique that is in effect            for this port.              nrz    for Non-Return to Zero encoding              nrzi   for Non-Return to Zero Inverted encoding."       DEFVAL { nrz }       ::= { rs232SyncPortEntry 9 }   rs232SyncPortRTSControl OBJECT-TYPE       SYNTAX INTEGER  { controlled(1), constant(2) }       MAX-ACCESS read-write       STATUS current       DESCRIPTIONStewart                                                        [Page 12]

RFC 1659                    RS-232-like MIB                    July 1994           "The method used to control the Request To Send (RTS)            signal.              controlled  when the DTE is asserts RTS each time                          data needs to be transmitted and drops                          RTS at some point after data                          transmission begins.                          If rs232SyncPortRole is 'dte', the                          RTS is an output signal. The device                          will issue a RTS and wait for a CTS                          from the DCE before starting to                          transmit.                          If rs232SyncPortRole is 'dce', the                          RTS is an input signal. The device                          will issue a CTS only after having                          received RTS and waiting the                          rs232SyncPortRTSCTSDelay interval.              constant    when the DTE constantly asserts RTS."       DEFVAL { constant }       ::= { rs232SyncPortEntry 10 }   rs232SyncPortRTSCTSDelay OBJECT-TYPE       SYNTAX Integer32       MAX-ACCESS read-write       STATUS current       DESCRIPTION           "The interval (in milliseconds) that the DCE must wait            after it sees RTS asserted before asserting CTS.  This            object exists in support of older synchronous devices            that cannot recognize CTS within a certain interval            after it asserts RTS."       DEFVAL { 0 }       ::= { rs232SyncPortEntry 11 }   rs232SyncPortMode OBJECT-TYPE       SYNTAX INTEGER  { fdx(1), hdx(2), simplex-receive(3),                         simplex-send(4) }       MAX-ACCESS read-write       STATUS current       DESCRIPTION           "The mode of operation of the port with respect to the            direction and simultaneity of data transfer.Stewart                                                        [Page 13]

RFC 1659                    RS-232-like MIB                    July 1994              fdx              when frames on the data link can be                               transmitted and received at the same                               time              hdx              when frames can either be received                               from the data link or transmitted                               onto the data link but not at the                               same time.              simplex-receive  when frames can only be received on                               this data link.              simplex-send     when frames can only be sent on this                               data link."       DEFVAL { fdx }       ::= { rs232SyncPortEntry 12 }   rs232SyncPortIdlePattern OBJECT-TYPE       SYNTAX INTEGER  { mark(1), space(2) }       MAX-ACCESS read-write       STATUS current       DESCRIPTION           "The bit pattern used to indicate an idle line."       DEFVAL { space }       ::= { rs232SyncPortEntry 13 }   rs232SyncPortMinFlags OBJECT-TYPE       SYNTAX Integer32       MAX-ACCESS read-write       STATUS current       DESCRIPTION           "The minimum number of flag patterns this port needs in            order to recognize the end of one frame and the start            of the next.  Plausible values are 1 and 2."       DEFVAL { 2 }       ::= { rs232SyncPortEntry 14 }   -- Input Signal Table   rs232InSigTable OBJECT-TYPE       SYNTAX SEQUENCE OF Rs232InSigEntry       MAX-ACCESS not-accessible       STATUS current       DESCRIPTION           "A list of port input control signal entries           implemented and visible to the software on the port,           and useful to monitor."Stewart                                                        [Page 14]

RFC 1659                    RS-232-like MIB                    July 1994       ::= { rs232 5 }   rs232InSigEntry OBJECT-TYPE       SYNTAX Rs232InSigEntry       MAX-ACCESS not-accessible       STATUS current       DESCRIPTION           "Input control signal status for a hardware port."       INDEX { rs232InSigPortIndex, rs232InSigName }       ::= { rs232InSigTable 1 }   Rs232InSigEntry ::=       SEQUENCE {           rs232InSigPortIndex               InterfaceIndex,           rs232InSigName               INTEGER,           rs232InSigState               INTEGER,           rs232InSigChanges               Counter32       }   rs232InSigPortIndex OBJECT-TYPE       SYNTAX InterfaceIndex       MAX-ACCESS read-only       STATUS current       DESCRIPTION           "The value of rs232PortIndex for the port to which           this entry belongs."       ::= { rs232InSigEntry 1 }   rs232InSigName OBJECT-TYPE       SYNTAX INTEGER { rts(1), cts(2), dsr(3), dtr(4), ri(5),                        dcd(6), sq(7), srs(8), srts(9),                        scts(10), sdcd(11) }       MAX-ACCESS read-only       STATUS current       DESCRIPTION           "Identification of a hardware signal, as follows:               rts    Request to Send               cts    Clear to Send               dsr    Data Set Ready               dtr    Data Terminal Ready               ri     Ring Indicator               dcd    Received Line Signal Detector               sq     Signal Quality DetectorStewart                                                        [Page 15]

RFC 1659                    RS-232-like MIB                    July 1994               srs    Data Signaling Rate Selector               srts   Secondary Request to Send               scts   Secondary Clear to Send               sdcd   Secondary Received Line Signal Detector           "       REFERENCE           "EIA Standard RS-232-C, August 1969."       ::= { rs232InSigEntry 2 }   rs232InSigState OBJECT-TYPE       SYNTAX INTEGER { none(1), on(2), off(3) }       MAX-ACCESS read-only       STATUS current       DESCRIPTION           "The current signal state."       ::= { rs232InSigEntry 3 }   rs232InSigChanges OBJECT-TYPE       SYNTAX Counter32       MAX-ACCESS read-only       STATUS current       DESCRIPTION           "The number of times the signal has changed from           'on' to 'off' or from 'off' to 'on'."       ::= { rs232InSigEntry 4 }   -- Output Signal Table   rs232OutSigTable OBJECT-TYPE       SYNTAX SEQUENCE OF Rs232OutSigEntry       MAX-ACCESS not-accessible       STATUS current       DESCRIPTION           "A list of port output control signal entries           implemented and visible to the software on the port,           and useful to monitor."       ::= { rs232 6 }   rs232OutSigEntry OBJECT-TYPE       SYNTAX Rs232OutSigEntry       MAX-ACCESS not-accessible       STATUS current       DESCRIPTION           "Output control signal status for a hardware port."       INDEX { rs232OutSigPortIndex, rs232OutSigName }       ::= { rs232OutSigTable 1 }Stewart                                                        [Page 16]

RFC 1659                    RS-232-like MIB                    July 1994   Rs232OutSigEntry ::=       SEQUENCE {           rs232OutSigPortIndex               InterfaceIndex,           rs232OutSigName               INTEGER,           rs232OutSigState               INTEGER,           rs232OutSigChanges               Counter32       }   rs232OutSigPortIndex OBJECT-TYPE       SYNTAX InterfaceIndex       MAX-ACCESS read-only       STATUS current       DESCRIPTION           "The value of rs232PortIndex for the port to which           this entry belongs."       ::= { rs232OutSigEntry 1 }   rs232OutSigName OBJECT-TYPE       SYNTAX INTEGER { rts(1), cts(2), dsr(3), dtr(4), ri(5),                        dcd(6), sq(7), srs(8), srts(9),                        scts(10), sdcd(11) }       MAX-ACCESS read-only       STATUS current       DESCRIPTION           "Identification of a hardware signal, as follows:               rts    Request to Send               cts    Clear to Send               dsr    Data Set Ready               dtr    Data Terminal Ready               ri     Ring Indicator               dcd    Received Line Signal Detector               sq     Signal Quality Detector               srs    Data Signaling Rate Selector               srts   Secondary Request to Send               scts   Secondary Clear to Send               sdcd   Secondary Received Line Signal Detector           "       REFERENCE           "EIA Standard RS-232-C, August 1969."       ::= { rs232OutSigEntry 2 }   rs232OutSigState OBJECT-TYPE       SYNTAX INTEGER { none(1), on(2), off(3) }Stewart                                                        [Page 17]

RFC 1659                    RS-232-like MIB                    July 1994       MAX-ACCESS read-only       STATUS current       DESCRIPTION           "The current signal state."       ::= { rs232OutSigEntry 3 }   rs232OutSigChanges OBJECT-TYPE       SYNTAX Counter32       MAX-ACCESS read-only       STATUS current       DESCRIPTION           "The number of times the signal has changed from           'on' to 'off' or from 'off' to 'on'."       ::= { rs232OutSigEntry 4 }   -- conformance information   rs232Conformance OBJECT IDENTIFIER ::= { rs232 7 }   rs232Groups      OBJECT IDENTIFIER ::= { rs232Conformance 1 }   rs232Compliances OBJECT IDENTIFIER ::= { rs232Conformance 2 }   -- compliance statements   rs232Compliance MODULE-COMPLIANCE       STATUS  current       DESCRIPTION               "The compliance statement for SNMPv2 entities               which have RS-232-like hardware interfaces."       MODULE  -- this module           MANDATORY-GROUPS { rs232Group }           GROUP   rs232AsyncGroup           DESCRIPTION               "The Asynch group is mandatory only for those                SNMPv2 entities which have asynchronous                interfaces Rs-232-like."           GROUP   rs232SyncGroup           DESCRIPTION               "The Synch group is mandatory only for those                SNMPv2 entities which have synchronous                interfaces Rs-232-like."       ::= { rs232Compliances 1 }Stewart                                                        [Page 18]

RFC 1659                    RS-232-like MIB                    July 1994   -- units of conformance   rs232Group    OBJECT-GROUP       OBJECTS { rs232Number, rs232PortIndex, rs232PortType,                 rs232PortInSigNumber, rs232PortOutSigNumber,                 rs232PortInSpeed, rs232PortOutSpeed,                 rs232PortInFlowType, rs232PortOutFlowType,                 rs232InSigPortIndex, rs232InSigName,                 rs232InSigState, rs232InSigChanges,                 rs232OutSigPortIndex, rs232OutSigName,                 rs232OutSigState, rs232OutSigChanges }       STATUS  current       DESCRIPTION               "A collection of objects providing information                applicable to all RS-232-like interfaces."       ::= { rs232Groups 1 }   rs232AsyncGroup OBJECT-GROUP       OBJECTS { rs232AsyncPortIndex, rs232AsyncPortBits,                 rs232AsyncPortStopBits, rs232AsyncPortParity,                 rs232AsyncPortAutobaud, rs232AsyncPortParityErrs,                 rs232AsyncPortFramingErrs, rs232AsyncPortOverrunErrs }       STATUS  current       DESCRIPTION               "A collection of objects providing information                applicable to asynchronous RS-232-like interfaces."       ::= { rs232Groups 2 }   rs232SyncGroup OBJECT-GROUP       OBJECTS { rs232SyncPortIndex, rs232SyncPortClockSource,                 rs232SyncPortFrameCheckErrs,                 rs232SyncPortTransmitUnderrunErrs,                 rs232SyncPortReceiveOverrunErrs,                 rs232SyncPortInterruptedFrames,                 rs232SyncPortAbortedFrames }       STATUS  current       DESCRIPTION               "A collection of objects providing information                applicable to synchronous RS-232-like interfaces."       ::= { rs232Groups 3 }   rs232SyncSDLCGroup OBJECT-GROUP       OBJECTS { rs232SyncPortRole,                 rs232SyncPortEncoding,                 rs232SyncPortRTSControl,                 rs232SyncPortRTSCTSDelay,                 rs232SyncPortMode,                 rs232SyncPortIdlePattern,Stewart                                                        [Page 19]

RFC 1659                    RS-232-like MIB                    July 1994                 rs232SyncPortMinFlags }       STATUS  current       DESCRIPTION               "A collection of objects providing information                applicable to synchronous RS-232-like interfaces                running SDLC."       ::= { rs232Groups 4 }   END5.  Acknowledgements   This memo was produced by the IETF Character MIB Working Group.6.  References   [1] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Structure       of Management Information for version 2 of the Simple Network       Management Protocol (SNMPv2)",RFC 1442, SNMP Research,Inc.,       Hughes LAN Systems, Dover Beach Consulting, Inc., Carnegie Mellon       University, April 1993.   [2] McCloghrie, K., and M. Rose, Editors, "Management Information       Base for Network Management of TCP/IP-based internets: MIB-II",       STD 17,RFC 1213, Hughes LAN Systems, Performance Systems       International, March 1991.   [3] Galvin, J., and K. McCloghrie, "Administrative Model for version       2 of the Simple Network Management Protocol (SNMPv2)",RFC 1445,       Trusted Information Systems, Hughes LAN Systems, April 1993.   [4] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Protocol       Operations for version 2 of the Simple Network Management       Protocol (SNMPv2)",RFC 1448, SNMP Research,Inc., Hughes LAN       Systems, Dover Beach Consulting, Inc., Carnegie Mellon       University, April 1993.   [5] McCloghrie, K., and F. Kastenholz, "Evolution of the Interfaces       Group of MIB-II",RFC 1573, Hughes LAN Systems, FTP Software,       January 1994.   [6] Stewart, B., "Definitions of Managed Objects for Character Stream       Devices using SMIv2",RFC 1658, Xyplex, Inc., July 1994.   [7] Kastenholz, F., "The Definitions of Managed Objects for the Link       Control Protocol of the Point-to-Point Protocol",RFC 1471, FTP       Software, Inc., June 1993.Stewart                                                        [Page 20]

RFC 1659                    RS-232-like MIB                    July 19947.  Security Considerations   Security issues are not discussed in this memo.8.  Author's Address   Bob Stewart   Xyplex, Inc.   295 Foster Street   Littleton, MA 01460   Phone: 508-952-4816   Fax: 508-952-4887   EMail: rlstewart@eng.xyplex.comStewart                                                        [Page 21]

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