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diff --git a/doc/rfc/rfc1696.txt b/doc/rfc/rfc1696.txt new file mode 100644 index 0000000..83b73e0 --- /dev/null +++ b/doc/rfc/rfc1696.txt @@ -0,0 +1,1739 @@ + + + + + + +Network Working Group J. Barnes +Request for Comments: 1696 Xylogics, Inc. +Category: Standards Track L. Brown + Motorola + R. Royston + US Robotics, Inc. + S. Waldbusser + Carnegie Mellon University + August 1994 + + + Modem Management Information Base (MIB) using SMIv2 + +Status 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 Contents + + 1 Introduction ................................................. 1 + 2 The SNMPv2 Network Management Framework ...................... 2 + 2.1 Object Definitions ......................................... 2 + 3 Definitions .................................................. 2 + 4 Acknowledgements ............................................. 30 + 5. Security Considerations ..................................... 30 + 6. Authors' Addresses .......................................... 31 + +1. Introduction + + This memo defines a portion of the Management Information Base (MIB) + for use with network management protocols in the Internet community. + In particular, it describes managed objects used for managing dial-up + modems and similar dial-up devices. This MIB module provides a set + of objects that are the minimum necessary to provide the ability to + monitor and control those devices, and is consistent with the SNMP + framework and existing SNMP standards. + + + + + + + + + + + +Barnes, Brown, Royston & Waldbusser [Page 1] + +RFC 1696 Modem MIB August 1994 + + +2. The SNMPv2 Network Management Framework + + The SNMPv2 Network Management Framework consists of four major + components. They are: + + o RFC 1442 which defines the SMI, the mechanisms used for + describing and naming objects for the purpose of management. + + o STD 17, RFC 1213 defines MIB-II, the core set of managed objects + for the Internet suite of protocols. + + o RFC 1445 which defines the administrative and other + architectural aspects of the framework. + + o RFC 1448 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. Definitions + +Modem-MIB DEFINITIONS ::= BEGIN + + +IMPORTS + MODULE-IDENTITY, OBJECT-TYPE, OBJECT-IDENTITY, + Counter32, Integer32 FROM SNMPv2-SMI + DisplayString FROM SNMPv2-TC + MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF + mib-2 FROM RFC1213-MIB; + + +mdmMIB MODULE-IDENTITY + LAST-UPDATED "9406120000Z" + ORGANIZATION "IETF Modem Management Working Group" + + + +Barnes, Brown, Royston & Waldbusser [Page 2] + +RFC 1696 Modem MIB August 1994 + + + CONTACT-INFO + " Steven Waldbusser + Postal: Carnegie Mellon University + 5000 Forbes Ave + Pittsburgh, PA, 15213 + US + + Tel: +1 412 268 6628 + Fax: +1 412 268 4987 + E-mail: waldbusser@cmu.edu" + DESCRIPTION + "The MIB module for management of dial-up modems." + ::= { mdmMIB 1 } + +mdmMib OBJECT IDENTIFIER ::= { mib-2 38 } + +mdmMIBObjects OBJECT IDENTIFIER ::= { mdmMIB 1 } + + +-- conformance information + +mdmConformance OBJECT IDENTIFIER ::= { mdmMIB 2 } + +mdmCompliances OBJECT IDENTIFIER ::= { mdmConformance 1 } +mdmGroups OBJECT IDENTIFIER ::= { mdmConformance 2 } + +-- units of conformance + +mdmIDGroup OBJECT-GROUP + OBJECTS { mdmIDManufacturerOID, mdmIDProductDetails } + STATUS current + DESCRIPTION + "A collection of objects that identify the manufacturer and + model information for a modem." + ::= { mdmGroups 1 } + +mdmLineInterfaceGroup OBJECT-GROUP + OBJECTS { mdmLineCarrierLossTime, + mdmLineState, mdmLineCapabilitiesID, + mdmLineCapabilitiesEnableRequested, + mdmLineCapabilitiesEnableGranted } + STATUS current + DESCRIPTION + "A collection of objects that describe the configuration and + state of the modem's line interface." + ::= { mdmGroups 2 } + +mdmDTEInterfaceGroup OBJECT-GROUP + + + +Barnes, Brown, Royston & Waldbusser [Page 3] + +RFC 1696 Modem MIB August 1994 + + + OBJECTS { mdmDTEActionDTROnToOff, mdmDTEActionDTROffToOn, + mdmDTESyncTimingSource, mdmDTESyncAsyncMode, + mdmDTEInactivityTimeout } + STATUS current + DESCRIPTION + "A collection of objects that describe the configuration and + state of the modem's DTE interface." + ::= { mdmGroups 3 } + +mdmCallControlGroup OBJECT-GROUP + OBJECTS { mdmCCRingsBeforeAnswer, + mdmCCCallSetUpFailTimer, mdmCCResultCodeEnable, + mdmCCEscapeAction, mdmCCCallDuration, + mdmCCConnectionFailReason, mdmCCStoredDialString } + STATUS current + DESCRIPTION + "A collection of objects that describe the configuration of + call control capabilities on the modem and the status of + calls placed with this modem." + ::= { mdmGroups 4 } + +mdmErrorControlGroup OBJECT-GROUP + OBJECTS { mdmECErrorControlUsed } + STATUS current + DESCRIPTION + "A collection of objects that describe the configuration and + state of error control on a modem." + ::= { mdmGroups 5 } + +mdmDataCompressionGroup OBJECT-GROUP + OBJECTS { mdmDCCompressionTypeUsed } + STATUS current + DESCRIPTION + "A collection of objects that describe the configuration and + state of data compression on a modem." + ::= { mdmGroups 6 } + +mdmSignalConvertorGroup OBJECT-GROUP +OBJECTS { mdmSCCurrentLineReceiveRate, mdmSCCurrentLineTransmitRate, + mdmSCInitialLineReceiveRate, mdmSCInitialLineTransmitRate, + mdmSCModulationSchemeUsed } + STATUS current + DESCRIPTION + "A collection of objects that describe the configuration and + state of error control on a modem." + ::= { mdmGroups 7 } + +mdmStatisticsGroup OBJECT-GROUP + + + +Barnes, Brown, Royston & Waldbusser [Page 4] + +RFC 1696 Modem MIB August 1994 + + + OBJECTS { mdmStatsRingNoAnswers, + mdmStatsIncomingConnectionFailures, + mdmStatsIncomingConnectionCompletions, + mdmStatsFailedDialAttempts, + mdmStatsOutgoingConnectionFailures, + mdmStatsOutgoingConnectionCompletions, + mdmStatsRetrains, + mdmStats2400OrLessConnections, mdmStats2400To14400Connections, + mdmStatsGreaterThan14400Connections, + mdmStatsErrorControlledConnections, + mdmStatsCompressedConnections, + mdmStatsCompressionEfficiency, + mdmStatsSentOctets, mdmStatsReceivedOctets, + mdmStatsSentDataFrames, mdmStatsReceivedDataFrames, + mdmStatsResentFrames, mdmStatsErrorFrames } + STATUS current + DESCRIPTION + "A collection of objects that describe the state of calls on + this modem." + ::= { mdmGroups 8 } + +mdmNumber OBJECT-TYPE + SYNTAX Integer32 + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "The number of modem rows in the modem table. This value + defines the maximum value of the mdmIndex object." + ::= { mdmMIBObjects 1 } + +-- The modem ID table. + +mdmIDTable OBJECT-TYPE + SYNTAX SEQUENCE OF MdmIDEntry + MAX-ACCESS not-accessible + STATUS current + DESCRIPTION + "The base table for the modems managed by this MIB. The + mdmLineTable, mdmDTEInterfaceTable, mdmCallControlTable, and + mdmStatsTable all augment the rows defined in this table." + ::= { mdmMIBObjects 2 } + +mdmIDEntry OBJECT-TYPE + SYNTAX MdmIDEntry + MAX-ACCESS not-accessible + STATUS current + DESCRIPTION + "Entries in this table are created only by the agent. One + + + +Barnes, Brown, Royston & Waldbusser [Page 5] + +RFC 1696 Modem MIB August 1994 + + + entry exists for each modem managed by the agent." + INDEX { mdmIndex } + ::= { mdmIDTable 1 } + +MdmIDEntry ::= SEQUENCE { + mdmIndex Integer32, + mdmIDManufacturerOID OBJECT IDENTIFIER, + mdmIDProductDetails DisplayString +} + +mdmIndex OBJECT-TYPE + SYNTAX Integer32 (1..65535) + MAX-ACCESS not-accessible + STATUS current + DESCRIPTION + "A unique number for each modem that ranges from 1 to + mdmNumber. The value must remain constant at least from one + re-initialization of the network management agent to the + next." + ::= { mdmIDEntry 1 } + +mdmIDManufacturerOID OBJECT-TYPE + SYNTAX OBJECT IDENTIFIER + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "This value is intended to identify the manufacturer, model, + and version of this modem. This may be used to identify the + existance of enterprise-specific functions and behaviours." + REFERENCE + "V.58 attribute manufacturerID subfield ManufacturerOI" + ::= { mdmIDEntry 2 } + +mdmIDProductDetails OBJECT-TYPE + SYNTAX DisplayString (SIZE (0..79)) + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "A textual description of this device, including the + manufacturer's name, modem model name, hardware revision, + firmware revision, and optionally, its serial number. The + exact format of this description is defined by the vendor. + This description may only contain characters from the NVT + ASCII character set." + REFERENCE + "V.58 attribute manufacturerID subfield productDetails" + ::= { mdmIDEntry 3 } + + + + +Barnes, Brown, Royston & Waldbusser [Page 6] + +RFC 1696 Modem MIB August 1994 + + +-- The modem Line Interface Table + +mdmLineTable OBJECT-TYPE + SYNTAX SEQUENCE OF MdmLineEntry + MAX-ACCESS not-accessible + STATUS current + DESCRIPTION + "The modem Line Table augments the modem ID table." + ::= { mdmMIBObjects 3 } + +mdmLineEntry OBJECT-TYPE + SYNTAX MdmLineEntry + MAX-ACCESS not-accessible + STATUS current + DESCRIPTION + "Entries in this table are created only by the agent. One + entry exists for each modem managed by the agent." + AUGMENTS { mdmIDEntry } + ::= { mdmLineTable 1 } + +MdmLineEntry ::= SEQUENCE { + mdmLineCarrierLossTime Integer32, + mdmLineState INTEGER +} + +mdmLineCarrierLossTime OBJECT-TYPE + SYNTAX Integer32 (1..255) + MAX-ACCESS read-write + STATUS current + DESCRIPTION + "Duration in 10ths of a second the modem waits after loss of + carrier before hanging up. If this value is set to `255', + the modem will not hang up upon loss of carrier. This + allows the modem to distinguish between a momentary lapse in + line quality and a true disconnect and can be useful to tune + the tolerance of the modem to lines of poor quality." + REFERENCE "V.58 lineSignalFailDisconnectTimer" + ::= { mdmLineEntry 1 } + +mdmLineState OBJECT-TYPE + SYNTAX INTEGER { + unknown(1), + onHook(2), + offHook(3), -- and not connected + connected(4), + busiedOut(5), + reset(6) + } + + + +Barnes, Brown, Royston & Waldbusser [Page 7] + +RFC 1696 Modem MIB August 1994 + + + MAX-ACCESS read-write + STATUS current + DESCRIPTION + "Allows the inspection and alteration of the state of the + modem. Management commands may change the state to `on- + hook', `busied-out', or `reset' from any state. No other + alterations are permitted from the management protocol. + When this object is set to reset, the modem shall be reset + and the value will change to the modem's new, implementation + dependent state." + ::= { mdmLineEntry 2 } + +mdmLineCapabilitiesTable OBJECT-TYPE + SYNTAX SEQUENCE OF MdmLineCapabilitiesEntry + MAX-ACCESS not-accessible + STATUS current + DESCRIPTION + "A list of protocol capabilities for this modem." + ::= { mdmMIBObjects 4 } + +mdmLineCapabilitiesEntry OBJECT-TYPE + SYNTAX MdmLineCapabilitiesEntry + MAX-ACCESS not-accessible + STATUS current + DESCRIPTION + "A listing of the protocol(s) that this modem is capable of. + Entries in this table are created only by the agent. One + entry exists for each protocol that the modem is capable of, + regardless of whether that protocol is enabled or not. + + This table is useful for providing an inventory of the + capabilities on a modem, and allowing the manager to enable + or disable capabilities from the menu of available + possibilities. Row creation is not required to enable or + disable capabilities." + INDEX { mdmIndex, mdmLineCapabilitiesIndex } + ::= { mdmLineCapabilitiesTable 1 } + +MdmLineCapabilitiesEntry ::= SEQUENCE { + mdmLineCapabilitiesIndex Integer32, + mdmLineCapabilitiesID OBJECT IDENTIFIER, + mdmLineCapabilitiesEnableRequested INTEGER, + mdmLineCapabilitiesEnableGranted INTEGER +} + +mdmLineCapabilitiesIndex OBJECT-TYPE + SYNTAX Integer32 + MAX-ACCESS not-accessible + + + +Barnes, Brown, Royston & Waldbusser [Page 8] + +RFC 1696 Modem MIB August 1994 + + + STATUS current + DESCRIPTION + "A unique index for this capabilities entry." + ::= { mdmLineCapabilitiesEntry 1 } + +mdmLineCapabilitiesID OBJECT-TYPE + SYNTAX OBJECT IDENTIFIER + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "An identifier for this capability. Standard protocol + capabilities will have identifiers registered in this + document or other companion standards documents. + Proprietary protocol capabilities will be registered by + their respective organization. All capabilities, standard + or vendor-specific, shall be registered in this table." + ::= { mdmLineCapabilitiesEntry 2 } + +mdmLineCapabilitiesEnableRequested OBJECT-TYPE + SYNTAX INTEGER { + disabled(1), + optional(2), + preferred(3) + } + MAX-ACCESS read-write + STATUS current + DESCRIPTION + "The requested configuration of this capability. If this + value is 'disabled(1)', this is a request to disable this + protocol. If this value is 'preferred(3)', this is a + request to enable this protocol, and to prefer it in any + negotiation over other appropriate protocols that have a + value of 'optional(2)'." + DEFVAL { preferred } + ::= { mdmLineCapabilitiesEntry 3 } + +mdmLineCapabilitiesEnableGranted OBJECT-TYPE + SYNTAX INTEGER { + disabled(1), + optional(2), + preferred(3) + } + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "The actual configuration of this capability. The agent + shall attempt to set this as close as possible to the + associated mdmLineCapabilitiesEnableRequested value. The + + + +Barnes, Brown, Royston & Waldbusser [Page 9] + +RFC 1696 Modem MIB August 1994 + + + agent shall make this determination in an implementation- + specific manner that may take into account the configuration + of other capabilities or other considerations. The modem + will choose in an implementation-specific manner between + multiple mutually-exclusive capabilities that each have the + same (non-disabled) value. However, the modem must prefer + all capabilities with a value of 'preferred(3)' over all + capabilities with a value of 'optional(2)'. + + In other words, if there are one or more mutually-exclusive + capabilities (e.g. V.32 and V.32bis) that are set to + `preferred', the agent must choose one in an + implementation-specific manner. Otherwise, if there are one + or more mutually-exclusive capabilities that are set to + `optional', the agent must choose one in an implementation- + specific manner." + ::= { mdmLineCapabilitiesEntry 4 } + +mdmLineCapabilities OBJECT IDENTIFIER ::= { mdmMIBObjects 5 } + +mdmLineCapabilitiesV21 OBJECT-IDENTITY + STATUS current + DESCRIPTION + "ITU V.21" + ::= { mdmLineCapabilities 1 } + +mdmLineCapabilitiesV22 OBJECT-IDENTITY + STATUS current + DESCRIPTION + "ITU V.22" + ::= { mdmLineCapabilities 2 } + +mdmLineCapabilitiesV22bis OBJECT-IDENTITY + STATUS current + DESCRIPTION + "ITU V.22bis" + ::= { mdmLineCapabilities 3 } + +mdmLineCapabilitiesV23CC OBJECT-IDENTITY + STATUS current + DESCRIPTION + "ITU V.23CC" + ::= { mdmLineCapabilities 4 } + +mdmLineCapabilitiesV23SC OBJECT-IDENTITY + STATUS current + DESCRIPTION + "ITU V.23SC" + + + +Barnes, Brown, Royston & Waldbusser [Page 10] + +RFC 1696 Modem MIB August 1994 + + + ::= { mdmLineCapabilities 5 } + +mdmLineCapabilitiesV25bis OBJECT-IDENTITY + STATUS current + DESCRIPTION + "ITU V.25bis" + ::= { mdmLineCapabilities 6 } + +mdmLineCapabilitiesV26bis OBJECT-IDENTITY + STATUS current + DESCRIPTION + "ITU V.26bis" + ::= { mdmLineCapabilities 7 } + +mdmLineCapabilitiesV26ter OBJECT-IDENTITY + STATUS current + DESCRIPTION + "ITU V.26ter" + ::= { mdmLineCapabilities 8 } + +mdmLineCapabilitiesV27ter OBJECT-IDENTITY + STATUS current + DESCRIPTION + "ITU V.27ter" + ::= { mdmLineCapabilities 9 } + +mdmLineCapabilitiesV32 OBJECT-IDENTITY + STATUS current + DESCRIPTION + "ITU V.32" + ::= { mdmLineCapabilities 10 } + +mdmLineCapabilitiesV32bis OBJECT-IDENTITY + STATUS current + DESCRIPTION + "ITU V.32bis" + ::= { mdmLineCapabilities 11 } + +mdmLineCapabilitiesV32terbo OBJECT-IDENTITY + STATUS current + DESCRIPTION + "ITU V.32terbo" + ::= { mdmLineCapabilities 12 } + +mdmLineCapabilitiesVFC OBJECT-IDENTITY + STATUS current + DESCRIPTION + "ITU V.FC" + + + +Barnes, Brown, Royston & Waldbusser [Page 11] + +RFC 1696 Modem MIB August 1994 + + + ::= { mdmLineCapabilities 13 } + +mdmLineCapabilitiesV34 OBJECT-IDENTITY + STATUS current + DESCRIPTION + "ITU V.34" + ::= { mdmLineCapabilities 14 } + +mdmLineCapabilitiesV42 OBJECT-IDENTITY + STATUS current + DESCRIPTION + "ITU V.42" + ::= { mdmLineCapabilities 15 } + +mdmLineCapabilitiesV42bis OBJECT-IDENTITY + STATUS current + DESCRIPTION + "ITU V.42bis" + ::= { mdmLineCapabilities 16 } + +mdmLineCapabilitiesMNP1 OBJECT-IDENTITY + STATUS current + DESCRIPTION + "MNP1" + ::= { mdmLineCapabilities 17 } + +mdmLineCapabilitiesMNP2 OBJECT-IDENTITY + STATUS current + DESCRIPTION + "MNP2" + ::= { mdmLineCapabilities 18 } + +mdmLineCapabilitiesMNP3 OBJECT-IDENTITY + STATUS current + DESCRIPTION + "MNP3" + ::= { mdmLineCapabilities 19 } + +mdmLineCapabilitiesMNP4 OBJECT-IDENTITY + STATUS current + DESCRIPTION + "MNP4" + ::= { mdmLineCapabilities 20 } + +mdmLineCapabilitiesMNP5 OBJECT-IDENTITY + STATUS current + DESCRIPTION + "MNP5" + + + +Barnes, Brown, Royston & Waldbusser [Page 12] + +RFC 1696 Modem MIB August 1994 + + + ::= { mdmLineCapabilities 21 } + +mdmLineCapabilitiesMNP6 OBJECT-IDENTITY + STATUS current + DESCRIPTION + "MNP6" + ::= { mdmLineCapabilities 22 } + +mdmLineCapabilitiesMNP7 OBJECT-IDENTITY + STATUS current + DESCRIPTION + "MNP7" + ::= { mdmLineCapabilities 23 } + +mdmLineCapabilitiesMNP8 OBJECT-IDENTITY + STATUS current + DESCRIPTION + "MNP8" + ::= { mdmLineCapabilities 24 } + +mdmLineCapabilitiesMNP9 OBJECT-IDENTITY + STATUS current + DESCRIPTION + "MNP9" + ::= { mdmLineCapabilities 25 } + +mdmLineCapabilitiesMNP10 OBJECT-IDENTITY + STATUS current + DESCRIPTION + "MNP10" + ::= { mdmLineCapabilities 26 } + +mdmLineCapabilitiesV29 OBJECT-IDENTITY + STATUS current + DESCRIPTION + "ITU V.29" + ::= { mdmLineCapabilities 27 } + +mdmLineCapabilitiesV33 OBJECT-IDENTITY + STATUS current + DESCRIPTION + "ITU V.33" + ::= { mdmLineCapabilities 28 } + +mdmLineCapabilitiesBell208 OBJECT-IDENTITY + STATUS current + DESCRIPTION + "Bell 208" + + + +Barnes, Brown, Royston & Waldbusser [Page 13] + +RFC 1696 Modem MIB August 1994 + + + ::= { mdmLineCapabilities 29 } + + +-- DTE Interface Table + +mdmDTEInterfaceTable OBJECT-TYPE + SYNTAX SEQUENCE OF MdmDTEInterfaceEntry + MAX-ACCESS not-accessible + STATUS current + DESCRIPTION + "The modem DTE Interface Table augments the modem ID table." + ::= { mdmMIBObjects 6 } + +mdmDTEInterfaceEntry OBJECT-TYPE + SYNTAX MdmDTEInterfaceEntry + MAX-ACCESS not-accessible + STATUS current + DESCRIPTION + "Entries in this table are created only by the agent. One + entry exists for each modem managed by the agent." + AUGMENTS { mdmIDEntry } + ::= { mdmDTEInterfaceTable 1 } + +MdmDTEInterfaceEntry ::= SEQUENCE { + mdmDTEActionDTROnToOff INTEGER, + mdmDTEActionDTROffToOn INTEGER, + mdmDTESyncTimingSource INTEGER, + mdmDTESyncAsyncMode INTEGER, + mdmDTEInactivityTimeout Integer32 +} + +mdmDTEActionDTROnToOff OBJECT-TYPE + SYNTAX INTEGER { + ignore(1), + escapeToCommandMode(2), + disconnectCall(3), + resetModem(4) + } + MAX-ACCESS read-write + STATUS current + DESCRIPTION + "Defines the action the modem will take when DTR drops. + + If the value is set to ignore(1), the modem takes no action + when DTR drops. Typically, mdmDTEActionDTROffToOn would + also be set to ignore(1) if this object is set to ignore(1). + + If the value is escapeToCommandMode(2), the modem remains + + + +Barnes, Brown, Royston & Waldbusser [Page 14] + +RFC 1696 Modem MIB August 1994 + + + connected and enters command mode. If the value is + disconnectCall(3), the current call (if any) is terminated + and the modem will not auto-answer while DTR is off. If the + value is resetModem(4), the current call (if any) is + terminated and the modem is reset." + DEFVAL { disconnectCall } + ::= { mdmDTEInterfaceEntry 1 } + +mdmDTEActionDTROffToOn OBJECT-TYPE + SYNTAX INTEGER { + ignore(1), + enableDial(2), + autoAnswerEnable(3), + establishConnection(4) + } + MAX-ACCESS read-write + STATUS current + DESCRIPTION + "Defines the action the modem will take when DTR is raised. + + If the value is set to ignore(1), the modem takes no action + when DTR is raised. Typically, mdmDTEActionDTROnToOff would + also be set to ignore(1) if this object is set to ignore(1). + + If the value is set to enableDial(2), the modem prepares to + dial an outgoing call. If the value is set to + autoAnswerEnable(3), the modem will be configured to answer + any incoming call. If the value is set to + establishConnection(4), the modem dials an implementation + specific number. + + Immediately after any reset or power-on of the modem, if the + DTR is high, the action specified here will be executed." + DEFVAL { autoAnswerEnable } + ::= { mdmDTEInterfaceEntry 2 } + +mdmDTESyncTimingSource OBJECT-TYPE + SYNTAX INTEGER { + internal(1), + external(2), + loopback(3), + network(4) + } + MAX-ACCESS read-write + STATUS current + DESCRIPTION + "The clock source for synchronous transmissions. If set to + internal(1), the modem is the clock source and sends the + + + +Barnes, Brown, Royston & Waldbusser [Page 15] + +RFC 1696 Modem MIB August 1994 + + + clock signals to the DTE. If set to external(2), the + transmit clock signals are provided by the DTE. If + loopback(3), the modem receiver clock is used for the + transmit clock. If network(4), the clock signals are + supplied by the DCE interface. + + If the modem is not in synchronous mode, setting this object + will have no effect on the current operations of the modem." + REFERENCE "V.58 transmitClockSource" + DEFVAL { internal } + ::= { mdmDTEInterfaceEntry 3 } + +mdmDTESyncAsyncMode OBJECT-TYPE + SYNTAX INTEGER { + async(1), + sync(2), + syncAfterDial(3) + } + MAX-ACCESS read-write + STATUS current + DESCRIPTION + "The operational mode of the modem. If the value is + syncAfterDial(3), the modem will accept commands in + asynchronous mode and change to synchronous mode to pass + data after a dial sequence has been executed." + DEFVAL { async } + ::= { mdmDTEInterfaceEntry 4 } + +mdmDTEInactivityTimeout OBJECT-TYPE + SYNTAX Integer32 (0..65535) + MAX-ACCESS read-write + STATUS current + DESCRIPTION + "The amount of idle time in minutes that the modem will wait + before disconnecting a connection. When a call is connected + and no data is transferred (continuous marking condition) on + both circuits 103 and 104 for the specified time, the DCE + disconnects the call. If the value is 0, no idle disconnect + will occur. This function applies to asynchronous dial + operations only and is intended for administrative control + over idle connections." + REFERENCE "V.58 inactivityTimerSelect" + DEFVAL { 0 } + ::= { mdmDTEInterfaceEntry 5 } + + +-- The Call Control Table + + + + +Barnes, Brown, Royston & Waldbusser [Page 16] + +RFC 1696 Modem MIB August 1994 + + +mdmCallControlTable OBJECT-TYPE + SYNTAX SEQUENCE OF MdmCallControlEntry + MAX-ACCESS not-accessible + STATUS current + DESCRIPTION + "The modem Call Control Table augments the modem ID table." + ::= { mdmMIBObjects 7 } + +mdmCallControlEntry OBJECT-TYPE + SYNTAX MdmCallControlEntry + MAX-ACCESS not-accessible + STATUS current + DESCRIPTION + "Entries in this table are created only by the agent. One + entry exists for each modem managed by the agent." + AUGMENTS { mdmIDEntry } + ::= { mdmCallControlTable 1 } + +MdmCallControlEntry ::= SEQUENCE { + mdmCCRingsBeforeAnswer Integer32, + mdmCCCallSetUpFailTimer Integer32, + mdmCCResultCodeEnable INTEGER, + mdmCCEscapeAction INTEGER, + mdmCCCallDuration Integer32, + mdmCCConnectionFailReason INTEGER +} + +mdmCCRingsBeforeAnswer OBJECT-TYPE + SYNTAX Integer32 + MAX-ACCESS read-write + STATUS current + DESCRIPTION + "Determines which ring the modem will wait to answer the + phone on. If this value is `0', the modem will not go + offhook and answer a call when a ring signal is detected." + REFERENCE "V.58 ringsBeforeAnswer" + DEFVAL { 1 } + ::= { mdmCallControlEntry 1 } + +mdmCCCallSetUpFailTimer OBJECT-TYPE + SYNTAX Integer32 (0..255) + MAX-ACCESS read-write + STATUS current + DESCRIPTION + "This parameter specifies the amount of time, in seconds, + that the modem shall allow between either answering a call + (automatically or manually) or completion of dialing, and + establishment of a connection with the remote modem. If no + + + +Barnes, Brown, Royston & Waldbusser [Page 17] + +RFC 1696 Modem MIB August 1994 + + + connection is established during this time, the modem + disconnects from the line and returns a result code + indicating the cause of the disconnection. In TIA-602, this + is controlled by the value in the S7 register." + REFERENCE "V.58 callSetUpFailTimer" + DEFVAL { 30 } + ::= { mdmCallControlEntry 2 } + +mdmCCResultCodeEnable OBJECT-TYPE + SYNTAX INTEGER { + disabled(1), + numericEnabled(2), + verboseEnabled(3) + } + MAX-ACCESS read-write + STATUS current + DESCRIPTION + "When disabled, the DCE shall issue no 'result codes' of any + kind to the DTE either in response to unsolicited events + (eg. ring signal), or commands. In TIA-602, this is + controlled by the ATQ command. When numericEnabled, the DCE + shall issue result codes in numeric form. When + verboseEnabled, the DCE shall issue result codes in a + verbose, textual form." + REFERENCE "V.58 responseModeSelect" + DEFVAL { verboseEnabled } + ::= { mdmCallControlEntry 3 } + +mdmCCEscapeAction OBJECT-TYPE + SYNTAX INTEGER { + ignoreEscape(1), + hangUp(2), + enterCommandMode(3) + } + MAX-ACCESS read-write + STATUS current + DESCRIPTION + "The modem's action upon successfully recognizing the + 'escape to command mode' character sequence." + DEFVAL { ignoreEscape } + ::= { mdmCallControlEntry 4 } + +-- Call status portion of the call control table + +mdmCCCallDuration OBJECT-TYPE + SYNTAX Integer32 + MAX-ACCESS read-only + STATUS current + + + +Barnes, Brown, Royston & Waldbusser [Page 18] + +RFC 1696 Modem MIB August 1994 + + + DESCRIPTION + "Present or last completed connection time in seconds. If + there have been no previous connections, this value should + be -1." + ::= { mdmCallControlEntry 5 } + + +mdmCCConnectionFailReason OBJECT-TYPE + SYNTAX INTEGER { + -- General + unknown(1), + other(2), + managementCommand(3), + inactivityTimeout(4), + mnpIncompatibility(5), + protocolError(6), + -- DCE + powerLoss(10), + equipmentFailure(11), + -- DTE Interface + dtrDrop(20), + -- Line Interface + noDialTone(30), + lineBusy(31), + noAnswer(32), + voiceDetected(33), + -- Signal Converter + carrierLost(40), + trainingFailed(41), + faxDetected(42) + } + MAX-ACCESS read-only + STATUS current + DESCRIPTION + + "Indicates the reason that the last connection or attempt + failed. The meaning of each reason code is explained below. + + unknown: + This code means the failure reason is unknown or + there has been no previous call. + + other: + This code used when no other code is applicable. + Additional vendor information may be available + elsewhere. + + managementCommand: + + + +Barnes, Brown, Royston & Waldbusser [Page 19] + +RFC 1696 Modem MIB August 1994 + + + A management command terminated the call. These + commands include escaping to command mode, initiating + dialing, restoring lines, and disconnecting. + + inactivityTimeout: + The call was terminated because it was inactive for + at the minimum duration specified. + + mnpIncompatibility: + The modems are unable to resolve MNP protocol + differences. + + protocolError: + An error occured in one of protocol in use. Further + information is required to determine in which + protocol the error occurred, and the exact nature of + the error. + + powerLoss: + The modem lost power and disconnected the call. + + equipmentFailure: + The modem equipment failed. + + dtrDrop: + DTR has been turned off while the modem is to + disconnect on DTR drop. (Ref: V.58 cct108TurnedOff) + + noDialTone: + If the modem is to monitor for call progress tones, + but the modem has failed to detect dial tone while + attempting to dial a number. + + lineBusy: + Busy signal is detected while busy signal detection + is enabled, or while the 'W' or '@' dial modifier is + used. (Ref: V.58 engagedTone) + + noAnswer: + The call was not answered. + + voiceDetected: + A voice was detected on the call. + + carrierLost: + Indicates that the modem has disconnected due to + detection of loss of carrier. In TIA-602, the S10 + register determines the time that loss of carrier + + + +Barnes, Brown, Royston & Waldbusser [Page 20] + +RFC 1696 Modem MIB August 1994 + + + must be detected before the modem disconnects. + + trainingFailed: + Indicates that the modems did not successfully train + and reach data mode on the previous connection. + + faxDetected: + A fax was detected on the call." + REFERENCE "V.58 callCleared" + ::= { mdmCallControlEntry 6 } + +-- The Stored Dial String table + +mdmCCStoredDialStringTable OBJECT-TYPE + SYNTAX SEQUENCE OF MdmCCStoredDialStringEntry + MAX-ACCESS not-accessible + STATUS current + DESCRIPTION + "The table of stored dial strings." + REFERENCE "V.58 telephoneNumbers" + ::= { mdmMIBObjects 8 } + +mdmCCStoredDialStringEntry OBJECT-TYPE + SYNTAX MdmCCStoredDialStringEntry + MAX-ACCESS not-accessible + STATUS current + DESCRIPTION + "A stored dial string." + INDEX { mdmIndex, mdmCCStoredDialStringIndex } + ::= { mdmCCStoredDialStringTable 1 } + +MdmCCStoredDialStringEntry ::= SEQUENCE { + mdmCCStoredDialStringIndex Integer32, + mdmCCStoredDialString DisplayString +} + +mdmCCStoredDialStringIndex OBJECT-TYPE + SYNTAX Integer32 (0..65535) + MAX-ACCESS not-accessible + STATUS current + DESCRIPTION + "The unique index of a particular dial string." + ::= { mdmCCStoredDialStringEntry 1 } + +mdmCCStoredDialString OBJECT-TYPE + SYNTAX DisplayString (SIZE(0..64)) + MAX-ACCESS read-write + STATUS current + + + +Barnes, Brown, Royston & Waldbusser [Page 21] + +RFC 1696 Modem MIB August 1994 + + + DESCRIPTION + "A dial string stored in the modem." + ::= { mdmCCStoredDialStringEntry 2 } + +-- The modem Error Correcting Group + +mdmECTable OBJECT-TYPE + SYNTAX SEQUENCE OF MdmECEntry + MAX-ACCESS not-accessible + STATUS current + DESCRIPTION + "The modem error correcting table augments the modem ID + table." + ::= { mdmMIBObjects 9 } + +mdmECEntry OBJECT-TYPE + SYNTAX MdmECEntry + MAX-ACCESS not-accessible + STATUS current + DESCRIPTION + "Entries in this table are created only by the agent. One + entry exists for each modem managed by the agent." + AUGMENTS { mdmIDEntry } + ::= { mdmECTable 1 } + +MdmECEntry ::= SEQUENCE { + mdmECErrorControlUsed OBJECT IDENTIFIER +} + +mdmECErrorControlUsed OBJECT-TYPE + SYNTAX OBJECT IDENTIFIER + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "Indicates the error control method used during the current + or previous call. This shall be one of the values for error + control protocols registered in the capabilities table for + this modem. If no error control protocol is in use, this + object shall have the value '{0 0}'." + REFERENCE "V.58 errorControlActive" + ::= { mdmECEntry 1 } + +-- The modem Data Compression Group + +mdmDCTable OBJECT-TYPE + SYNTAX SEQUENCE OF MdmDCEntry + MAX-ACCESS not-accessible + STATUS current + + + +Barnes, Brown, Royston & Waldbusser [Page 22] + +RFC 1696 Modem MIB August 1994 + + + DESCRIPTION + "The modem data compression table augments the modem ID + table." + ::= { mdmMIBObjects 10 } + +mdmDCEntry OBJECT-TYPE + SYNTAX MdmDCEntry + MAX-ACCESS not-accessible + STATUS current + DESCRIPTION + "Entries in this table are created only by the agent. One + entry exists for each modem managed by the agent." + AUGMENTS { mdmIDEntry } + ::= { mdmDCTable 1 } + +MdmDCEntry ::= SEQUENCE { + mdmDCCompressionTypeUsed OBJECT IDENTIFIER +} + +mdmDCCompressionTypeUsed OBJECT-TYPE + SYNTAX OBJECT IDENTIFIER + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "Indicates the data compression method used during the + current or previous call. This shall be one of the values + for compression protocols registered in the capabilities + table for this modem. If no compression protocol is in use, + this object shall have the value '{0 0}'." + ::= { mdmDCEntry 1 } + +-- The modem Signal Convertor Group + +mdmSCTable OBJECT-TYPE + SYNTAX SEQUENCE OF MdmSCEntry + MAX-ACCESS not-accessible + STATUS current + DESCRIPTION + "The modem signal convertor table augments the modem ID + table." + ::= { mdmMIBObjects 11 } + +mdmSCEntry OBJECT-TYPE + SYNTAX MdmSCEntry + MAX-ACCESS not-accessible + STATUS current + DESCRIPTION + "Entries in this table are created only by the agent. One + + + +Barnes, Brown, Royston & Waldbusser [Page 23] + +RFC 1696 Modem MIB August 1994 + + + entry exists for each modem managed by the agent." + AUGMENTS { mdmIDEntry } + ::= { mdmSCTable 1 } + +MdmSCEntry ::= SEQUENCE { + mdmSCCurrentLineTransmitRate Integer32, + mdmSCCurrentLineReceiveRate Integer32, + mdmSCInitialLineTransmitRate Integer32, + mdmSCInitialLineReceiveRate Integer32, + mdmSCModulationSchemeUsed OBJECT IDENTIFIER +} + +mdmSCCurrentLineTransmitRate OBJECT-TYPE + SYNTAX Integer32 + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "The current link transmit rate of a connection, or the last + link transmit rate of the last connection in bits per + second." + REFERENCE "V.58 transmissionSignallingRateActive" + ::= { mdmSCEntry 1 } + +mdmSCCurrentLineReceiveRate OBJECT-TYPE + SYNTAX Integer32 + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "The current link receive rate of a connection, or the last + link receive rate of the last connection in bits per + second." + REFERENCE "V.58 transmissionSignallingRateActive" + ::= { mdmSCEntry 2 } + +mdmSCInitialLineTransmitRate OBJECT-TYPE + SYNTAX Integer32 + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "The initial link transmit rate of the current connection, + or the initial link transmit rate of the last connection in + bits per second." + ::= { mdmSCEntry 3 } + +mdmSCInitialLineReceiveRate OBJECT-TYPE + SYNTAX Integer32 + MAX-ACCESS read-only + STATUS current + + + +Barnes, Brown, Royston & Waldbusser [Page 24] + +RFC 1696 Modem MIB August 1994 + + + DESCRIPTION + "The initial link receive rate of the current connection, or + the initial link receive rate of the last connection in bits + per second." + ::= { mdmSCEntry 4 } + +mdmSCModulationSchemeUsed OBJECT-TYPE + SYNTAX OBJECT IDENTIFIER + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "The modulation scheme of the current or previous call. + This shall be one of the values for modulation protocols + registered in the capabilities table for this modem." + REFERENCE "V.58 gstnModulationSchemeActive" + ::= { mdmSCEntry 5 } + +-- The Modem Statistics Table + +mdmStatsTable OBJECT-TYPE + SYNTAX SEQUENCE OF MdmStatsEntry + MAX-ACCESS not-accessible + STATUS current + DESCRIPTION + "The modem statistics Table augments the modem ID table." + ::= { mdmMIBObjects 12 } + +mdmStatsEntry OBJECT-TYPE + SYNTAX MdmStatsEntry + MAX-ACCESS not-accessible + STATUS current + DESCRIPTION + "Entries in this table are created only by the agent. One + entry exists for each modem managed by the agent." + AUGMENTS { mdmIDEntry } + ::= { mdmStatsTable 1 } + +MdmStatsEntry ::= SEQUENCE { + mdmStatsRingNoAnswers Counter32, + mdmStatsIncomingConnectionFailures Counter32, + mdmStatsIncomingConnectionCompletions Counter32, + mdmStatsFailedDialAttempts Counter32, + mdmStatsOutgoingConnectionFailures Counter32, + mdmStatsOutgoingConnectionCompletions Counter32, + mdmStatsRetrains Counter32, + mdmStats2400OrLessConnections Counter32, + mdmStats2400To14400Connections Counter32, + mdmStatsGreaterThan14400Connections Counter32, + + + +Barnes, Brown, Royston & Waldbusser [Page 25] + +RFC 1696 Modem MIB August 1994 + + + mdmStatsErrorControlledConnections Counter32, + mdmStatsCompressedConnections Counter32, + mdmStatsCompressionEfficiency Integer32, + mdmStatsSentOctets Counter32, + mdmStatsReceivedOctets Counter32, + mdmStatsSentDataFrames Counter32, + mdmStatsReceivedDataFrames Counter32, + mdmStatsResentFrames Counter32, + mdmStatsErrorFrames Counter32 +} + +mdmStatsRingNoAnswers OBJECT-TYPE + SYNTAX Counter32 + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "The number of events in which ringing was detected but the + call was not answered." + ::= { mdmStatsEntry 1 } + +mdmStatsIncomingConnectionFailures OBJECT-TYPE + SYNTAX Counter32 + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "The number of incoming connection requests that this modem + answered in which it could not train with the other DCE." + ::= { mdmStatsEntry 2 } + +mdmStatsIncomingConnectionCompletions OBJECT-TYPE + SYNTAX Counter32 + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "The number of incoming connection requests that this modem + answered and successfully trained with the other DCE." + ::= { mdmStatsEntry 3 } + +mdmStatsFailedDialAttempts OBJECT-TYPE + SYNTAX Counter32 + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "The number of call attempts that failed because the modem + didn't go off hook, or there was no dialtone." + ::= { mdmStatsEntry 4 } + +mdmStatsOutgoingConnectionFailures OBJECT-TYPE + + + +Barnes, Brown, Royston & Waldbusser [Page 26] + +RFC 1696 Modem MIB August 1994 + + + SYNTAX Counter32 + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "The number of outgoing calls from this modem which + sucessfully went off hook and dialed, in which it could not + train with the other DCE." + ::= { mdmStatsEntry 5 } + +mdmStatsOutgoingConnectionCompletions OBJECT-TYPE + SYNTAX Counter32 + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "The number of outgoing calls from this modem which resulted + in successfully training with the other DCE." + ::= { mdmStatsEntry 6 } + +mdmStatsRetrains OBJECT-TYPE + SYNTAX Counter32 + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "The number of retrains experienced on connections on this + line." + ::= { mdmStatsEntry 7 } + + +-- Utilization counters + +mdmStats2400OrLessConnections OBJECT-TYPE + SYNTAX Counter32 + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "The number of connections initially established at a + modulation speed of 2400 bits per second or less." + ::= { mdmStatsEntry 8 } + + +mdmStats2400To14400Connections OBJECT-TYPE + SYNTAX Counter32 + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "The number of connections initially established at a + modulation speed of greater than 2400 bits per second and + less than 14400 bits per second." + + + +Barnes, Brown, Royston & Waldbusser [Page 27] + +RFC 1696 Modem MIB August 1994 + + + ::= { mdmStatsEntry 9 } + +mdmStatsGreaterThan14400Connections OBJECT-TYPE + SYNTAX Counter32 + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "The number of connections initially established at a + modulation speed of greater than 14400 bits per second." + ::= { mdmStatsEntry 10 } + +mdmStatsErrorControlledConnections OBJECT-TYPE + SYNTAX Counter32 + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "The number of established connections using an error + control protocol." + ::= { mdmStatsEntry 11 } + +mdmStatsCompressedConnections OBJECT-TYPE + SYNTAX Counter32 + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "The number of established connections using a compression + protocol." + ::= { mdmStatsEntry 12 } + +mdmStatsCompressionEfficiency OBJECT-TYPE + SYNTAX Integer32 (0..65535) + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "The number of bytes transferred into the compression + encoder divided by the number of bytes transferred out of + the encoder, multiplied by 100 for either the current or + last call. If a data compression protocol is not in use, + this value shall be `100'." + REFERENCE "V.58 compressionEfficiency" + ::= { mdmStatsEntry 13 } + +mdmStatsSentOctets OBJECT-TYPE + SYNTAX Counter32 + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "The number of octets presented to the modem by the DTE." + + + +Barnes, Brown, Royston & Waldbusser [Page 28] + +RFC 1696 Modem MIB August 1994 + + + ::= { mdmStatsEntry 14 } + +mdmStatsReceivedOctets OBJECT-TYPE + SYNTAX Counter32 + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "The number of octets presented to the DTE by the modem." + ::= { mdmStatsEntry 15 } + +mdmStatsSentDataFrames OBJECT-TYPE + SYNTAX Counter32 + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "The number of data frames sent on the line interface. If + there is no frame-oriented protocol in use on the line + interface, this counter shall not increment." + ::= { mdmStatsEntry 16 } + +mdmStatsReceivedDataFrames OBJECT-TYPE + SYNTAX Counter32 + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "The number of data frames received on the line interface. + If there is no frame-oriented protocol in use on the line + interface, this counter shall not increment." + ::= { mdmStatsEntry 17 } + +mdmStatsResentFrames OBJECT-TYPE + SYNTAX Counter32 + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "The number of times this modem retransmits frames on the + line interface. If there is no frame-oriented protocol in + use on the line interface, this counter shall not + increment." + ::= { mdmStatsEntry 18 } + +mdmStatsErrorFrames OBJECT-TYPE + SYNTAX Counter32 + MAX-ACCESS read-only + STATUS current + DESCRIPTION + "The number of block errors received on the link. If there + is no frame-oriented protocol in use on the line interface, + + + +Barnes, Brown, Royston & Waldbusser [Page 29] + +RFC 1696 Modem MIB August 1994 + + + this counter shall not increment." + ::= { mdmStatsEntry 19 } + + +-- compliance statements + +mdmCompliance MODULE-COMPLIANCE + STATUS current + DESCRIPTION + "The compliance statement for SNMPv2 entities which + implement the modem MIB." + + MODULE -- this module + MANDATORY-GROUPS { mdmIDGroup, mdmLineInterfaceGroup, + mdmDTEInterfaceGroup, mdmCallControlGroup, + mdmSignalConvertorGroup, mdmStatisticsGroup } + + GROUP mdmErrorControlGroup + DESCRIPTION + "This group is mandatory only for those modems that + implement an error correction protocol." + + GROUP mdmDataCompressionGroup + DESCRIPTION + "This group is mandatory only for those modems that + implement a data compression protocol." + ::= { mdmCompliances 1 } + + +END + +4. Acknowledgements + + This document was produced by the Modem Management Working group. + + In addition, the authors gratefully acknowledge the comments of Tom + Holodnik and Mark S. Lewis. + +5. Security Considerations + + Security issues are not discussed in this memo. + + + + + + + + + + +Barnes, Brown, Royston & Waldbusser [Page 30] + +RFC 1696 Modem MIB August 1994 + + +6. Authors' Addresses + + Jim Barnes + Xylogics, Inc. + 53 Third Avenue + Burlington, MA 01803 + USA + + Phone: 617-272-8140 + Fax: 617-272-2618 + EMail: barnes@xylogics.com + + + Les Brown + Motorola + + Phone: 416-507-7200 + EMail: brown_l@msm.cdx.mot.com + + + Rick Royston + US Robotics, Inc. + 8100 N. McCormick Boulevard + Skokie, IL 60076-2999 + USA + + Phone: 708-933-5430 + Fax: 708-982-1348 + EMail: rroyston@usr.com + + + Steven Waldbusser + Carnegie Mellon University + Computing and Communications + Cyert Hall 130 + 5000 Forbes Avenue + Pittsburgh, PA 15213-3890 + USA + + Phone: 412-268-6628 + Fax: 412-268-4987 + EMail: swol@andrew.cmu.edu + + + + + + + + + +Barnes, Brown, Royston & Waldbusser [Page 31] + |