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+RS-232-MIB DEFINITIONS ::= BEGIN
+
+IMPORTS
+    MODULE-IDENTITY, OBJECT-TYPE, transmission,
+    Counter32, Integer32
+        FROM SNMPv2-SMI
+    InterfaceIndex
+        FROM IF-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.
+                     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,
+        rs232PortType
+            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 }
+
+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'
+        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
+
+    }
+
+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."
+    ::= { 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 current
+    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 }
+
+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 current
+    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
+    DESCRIPTION
+        "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.
+
+           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."
+    ::= { 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 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."
+    ::= { 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 }
+
+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) }
+    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 }
+
+-- 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,
+              rs232SyncPortMinFlags }
+    STATUS  current
+    DESCRIPTION
+            "A collection of objects providing information
+             applicable to synchronous RS-232-like interfaces
+             running SDLC."
+    ::= { rs232Groups 4 }
+
+END