ALC-MIB DEFINITIONS ::= BEGIN

	IMPORTS
		OBJECT-TYPE							FROM RFC-1212
		Counter, enterprises				FROM RFC1155-SMI
		DisplayString						FROM RFC1213-MIB
		rs232PortIndex						FROM RS-232-MIB
		TRAP-TYPE							FROM RFC-1215;


--	alcMIB MODULE-IDENTITY
--		LAST-UPDATED "9712230000Z"
--		ORGANIZATION "Northrop Grumman-Canada, Ltd."
--		CONTACT-INFO
--			"		Fulko K. Hew
--
--			Postal:	Northrop Grumman-Canada, Ltd.
--					777 Walkers Line
--					Burlington, Ontario
--					Canada
--					L7N 2G1
--
--			Tel:	+1 905 333 6000
--			Fax:	+1 905 333 6050
--
--			E-mail:	fulko@ngcan.com"
--		DESCRIPTION
--			"The MIB module to describe ALC Lines and Stations."

	ngcan			OBJECT IDENTIFIER ::= { enterprises 1978 }	-- Northrop Grumman-Canada, Ltd.
	tiger			OBJECT IDENTIFIER ::= { ngcan 2 }			-- Tiger (Network Access Device)

	alcMIB			OBJECT IDENTIFIER ::= { tiger 10 }

	alcLine			OBJECT IDENTIFIER ::= { alcMIB 1 }
	alcTraps		OBJECT IDENTIFIER ::= { alcMIB 2 }

	alcLineTraps	OBJECT IDENTIFIER ::= { alcTraps 1 }
	alcCuTraps		OBJECT IDENTIFIER ::= { alcTraps 2 }

	NonNegativeInteger ::= INTEGER (0..2147483647)

		-- InterfaceIndex contains the semantics of ifIndex and
		-- should be used for any objects defined on other mib
		-- modules that need these semantics.

	InterfaceIndex ::= INTEGER

		-- A unique value, greater than zero, for each interface
		-- or interface sub-layer in the managed system.  It is
		-- recommended that values are assigned contiguously
		-- starting from 1.  The value for each interface sub-
		-- layer must remain constant at least from one re-
		-- initialization of the entity's network management
		-- system to the next re-initialization."

	--
	-- ALC Line Configuration Parameters
	--

	alcNumLines OBJECT-TYPE
		SYNTAX		NonNegativeInteger
		ACCESS		read-only
		STATUS		mandatory
		DESCRIPTION
			"Number of lines/CU's in the table."
	::= { alcLine 1 }

	alcLineTable OBJECT-TYPE
		SYNTAX		SEQUENCE OF AlcLineEntry
		ACCESS		not-accessible
		STATUS		mandatory
		DESCRIPTION
			"A list of line table entries.  The number of entries
			is given by the value of alcNumLines."
		::= { alcLine 2 }

	alcLineEntry OBJECT-TYPE
		SYNTAX		AlcLineEntry
		ACCESS		not-accessible
		STATUS		mandatory
		DESCRIPTION
			"An entry containing information applicable to a particular ALC line."
		INDEX		{ alcLineIfIndex }
		::= { alcLineTable 1 }

	AlcLineEntry ::= SEQUENCE {
		alcLineIfIndex				InterfaceIndex,
		alcNumCuConfiged			NonNegativeInteger,
		alcLineStationType			INTEGER,
		alcDuplexOptions			INTEGER,
		alcT3MinCycleTime			INTEGER,
		alcT6SegmentedMsgTimer		INTEGER,
		alcN5LiveDeadRatio			INTEGER,
		alcSegmentOption			INTEGER,
		alcReassembleOption			INTEGER,
		alcWildIAPoll				INTEGER,
		alcNumOfIdles				INTEGER,
		alcInterMsgSync				INTEGER,
		alcNIA						INTEGER,

		-- Line Statistics
		--
		-- use ifOutUcastPkts, ifOutOctets, ifInUcastPkts,
		--  ifInOctets for char and pkt counters
		--

		alcTxOverlengthFrames		Counter,
		alcRxOverlengthFrames		Counter,
		alcInvalidAddresses			Counter,
		alcRxT2Expireds				Counter,
		alcDroppedMsgs				Counter,

		-- Line Trap Thresholds/Controls

		alcRxOverlengthFramesThres	NonNegativeInteger,
		alcInvalidAddressThres		NonNegativeInteger,
		alcRxT2ExpiredThres			NonNegativeInteger,

		alcTrapReason				INTEGER,
		alcErrData					OCTET STRING
		}

	alcLineIfIndex OBJECT-TYPE
		SYNTAX		InterfaceIndex
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"The line identifier."
		::= { alcLineEntry 1 }

	alcLineStationType OBJECT-TYPE
		SYNTAX		INTEGER {
			primary					(1),
			secondaryPointtopoint	(2),
			secondaryMultidrop		(3)
			}
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"Defines the mode of operation for this line:
				Primary:				We poll terminals,
				SecondaryPointtopoint:	They poll us, we are the only device on the line,
				SecondaryMultidrop:		They poll us, we are sharing the line."
			::= { alcLineEntry 2 }

	alcNumCuConfiged OBJECT-TYPE
		SYNTAX		NonNegativeInteger
		ACCESS		read-only
		STATUS		mandatory
		DESCRIPTION
			"The number of CUs configured on this line.
			This count is incremented by one each time the a new CU is
			added to an underlying structure."
			::= { alcLineEntry 3 }

	alcDuplexOptions OBJECT-TYPE
		SYNTAX		INTEGER {
			none			(1),
			poll-immediate	(2)
			}
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"An option that defines how the protocol should handle polling:

			poll-immediate:	don't wait for pad characters before sending the poll.
			none:			as soon as the CCC is received, start sending the next poll."
			::= { alcLineEntry 4 }

	alcT3MinCycleTime OBJECT-TYPE
		SYNTAX		INTEGER (0..1000)
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"time for a complete poll cycle.
			(0..1000 millisec) (PRIMARY only)
			This timer will delay the next live polling cycle if
			the total polling time per cycle is less than this.
			(default: 100).
			UNITS: milliseconds"
		DEFVAL		{ 100 }
		::= { alcLineEntry 5 }

	alcT6SegmentedMsgTimer OBJECT-TYPE
		SYNTAX		INTEGER (1..100)
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"(1..xx seconds) Segmented message timer.
			UNITS: tenths of a second"
		::= { alcLineEntry 6 }

	alcN5LiveDeadRatio OBJECT-TYPE
		SYNTAX		INTEGER (1..100)
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"polling ratio (1..xxx) (PRIMARY)
			Number of live-site poll sequences before one dead site poll.
			(default: 25).
			UNITS: polls"
		DEFVAL { 25 }
		::= { alcLineEntry 7 }

	alcSegmentOption OBJECT-TYPE
		SYNTAX		INTEGER {
			disabled	(1),
			enabled		(2)
			}
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"This option allows outgoing messages to be split into multiple
			segments of 'n' characters according to internal rules."
		::= { alcLineEntry 8 }

	alcReassembleOption OBJECT-TYPE
		SYNTAX		INTEGER {
			disabled	(1),
			enabled		(2)
			}
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"This option allows incoming messages to be reassembled
			into multiple a single message."
		::= { alcLineEntry 9 }

	alcWildIAPoll OBJECT-TYPE
		SYNTAX		INTEGER {
			disabled	(1),
			enabled		(2)
			}
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"Wild card IA polling option enabled/disabled (SECONDARY).
			Do we accept any IA when we are polled ?
			(default: disabled)."
		DEFVAL		{ disabled }
		::= { alcLineEntry 10 }

	alcNumOfIdles OBJECT-TYPE
		SYNTAX		INTEGER (1..4)
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"GA response with the number of idle pad character specified.  
(SECONDARY)"
		::= { alcLineEntry 11 }

	alcInterMsgSync OBJECT-TYPE
		SYNTAX		INTEGER {
			disabled	(1),
			enabled		(2)
			}
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"add S1, S2 between concatenated messages for Tx (SECONDARY)"
		::= { alcLineEntry 12 }

	alcNIA OBJECT-TYPE
		SYNTAX		INTEGER (1..64)
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"Next Interchange Address in the GA response
			(default = 0x37) (SECONDARY)"
		DEFVAL { 55 }
		::= { alcLineEntry 13 }

	--
	-- Line Statistics
	--

	alcTxOverlengthFrames OBJECT-TYPE
		SYNTAX		Counter
		ACCESS		read-only
		STATUS		mandatory
		DESCRIPTION
			"A count of the number of overlength frames sent."
		::= { alcLineEntry 14 }

	alcRxOverlengthFrames OBJECT-TYPE
		SYNTAX		Counter
		ACCESS		read-only
		STATUS		mandatory
		DESCRIPTION
			"A count of the number of overlength messages received.
			Where the size of any segment exceeded alcCuN1MaxMsgSize.
			This is considered a garbled segment/message.
			Note: a bad CCC was received is held in the RS232-like MIB."
		::= { alcLineEntry 15 }

	alcInvalidAddresses OBJECT-TYPE
		SYNTAX		Counter
		ACCESS		read-only
		STATUS		mandatory
		DESCRIPTION
			"A count of the number of times a Bad IA was received.
			This is considered a garbled message."
		::= { alcLineEntry 16 }

	alcRxT2Expireds OBJECT-TYPE
		SYNTAX		Counter
		ACCESS		read-only
		STATUS		mandatory
		DESCRIPTION
			"A count of the number of times the T2 timer was exceeded.
			Probably indicating a concatenated message sequence was too long.
			This is considered a garbled message."
		::= { alcLineEntry 17 }

	alcDroppedMsgs OBJECT-TYPE
		SYNTAX		Counter
		ACCESS		read-only
		STATUS		mandatory
		DESCRIPTION
			"A count of the number of messages dropped due to the line
			(eg. RS232 signals) being down."
		::= { alcLineEntry 18 }

	--
	-- Trap Controls
	--
	-- when these thresholds are exceeded a trap is generated,
	-- it is up to the management station to reset the count in order to
	-- let another trap occur.
	-- If the number is > 0, it means the trap is enabled.

	alcRxOverlengthFramesThres OBJECT-TYPE
		SYNTAX		NonNegativeInteger
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"The value of alcRxOverlengthFrames at which a alcRxOverlengthFramesTrap is generated.
			(Overlength single message segments.)
			UNITS: errors"
		::= { alcLineEntry 19 }

	alcInvalidAddressThres OBJECT-TYPE
		SYNTAX		NonNegativeInteger
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"The value of alcInvalidAddress at which a alcInvalidAddressTrap is generated.
			UNITS: errors"
		::= { alcLineEntry 20 }

	alcRxT2ExpiredThres OBJECT-TYPE
		SYNTAX		NonNegativeInteger
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"The value of alcRxT2Expired at which a alcRxT2ExpiredTrap is generated.
			(Overlength concatenated messages.)
			UNITS: errors"
		::= { alcLineEntry 21 }

	alcTrapReason OBJECT-TYPE
		SYNTAX		INTEGER {
			none					(1),
			rx-overlength-frames	(2),
			invalid-address			(3),
			rx-T2-expired			(4)
			}
		ACCESS		read-only
		STATUS		mandatory
		DESCRIPTION
			"The reason that the alcLineError trap was generated.

			rx-overlength-frames	- number of 'received data segments that exceeded N1' exceeded its threshold.
									  (overlength single message segments)
			invalid-address			- number of 'invalid addresses received' exceeded its threshold.
			rx-T2-expired			- number of 'received messages that exceeded T2 timer'exceeded its threshold.
									  (overlength concatenated messages)"
		DEFVAL		{ none }
		::= { alcLineEntry 23 }

	alcErrData OBJECT-TYPE
		SYNTAX		OCTET STRING
		ACCESS		read-only
		STATUS		mandatory
		DESCRIPTION
			"An octet string containing as much of the error packet as possible.
			As a minimum, it must contain the address or as much as was delivered.
			It is desirable to include all information up to the PDU."
	::= { alcLineEntry 24 }

	--
	-- Traps
	--
	-- This section defines the well-known notifications sent by ALC Line agents.
	-- These are sent when the corresponding threshold is exceeded.

	alcLineError TRAP-TYPE
		ENTERPRISE		alcLineTraps
		VARIABLES		{ alcLineIfIndex, alcTrapReason, rs232PortIndex }
		DESCRIPTION
			"This trap signifies that one of the thresholds has been exceeded.
			refer to 'alcTrapReason' for the actual cause."
	::= 1

	--
	-- ALC Station (CU)
	--

	alcCuTable OBJECT-TYPE
		SYNTAX		SEQUENCE OF AlcCuEntry
		ACCESS		not-accessible
		STATUS		mandatory
		DESCRIPTION
			"A list of Cu table entries.  The number of entries
			is given by the value of alcNumCuConfiged."
		::= { alcLine 3 }

	alcCuEntry OBJECT-TYPE
		SYNTAX		AlcCuEntry
		ACCESS		not-accessible
		STATUS		mandatory
		DESCRIPTION
			"An entry containing information applicable to a particular ALC line."
		INDEX		{ alcCuIfIndex, alcCuIA }
		::= { alcCuTable 1 }

	AlcCuEntry ::= SEQUENCE {
		alcCuIfIndex				INTEGER,
		alcCuDescr					DisplayString,
		alcCuIA						INTEGER,
		alcCuStatus					INTEGER,
		alcCuPollCmd				INTEGER,
		alcCuOutQueueMsgSize		INTEGER,
		alcCuOutQueueCharSize		INTEGER,
		alcCuN1MaxMsgSize			INTEGER,
		alcCuT1PollRspTimer			INTEGER,
		alcCuT2MaxRxTimer			INTEGER,
		alcCuT4NoPollTime			INTEGER,
		alcCuC1UpCounter			INTEGER,
		alcCuC2DownCounter			INTEGER,
		alcCuN2MaxMsgPerPoll		INTEGER,
		alcCuMaxCharPerPoll			INTEGER,
		alcCuN3PollsTillAlive		INTEGER,
		alcCuN4PollsTillDead		INTEGER,
		alcCuIAResetOption			INTEGER,
		alcCuIAValidationOption		INTEGER,
		alcCuRxCCCOption			DisplayString,
		alcCuMaxFrame				INTEGER,
		alcCuSvcMsgHeader			DisplayString,
		alcCuSvcMsgIndex			INTEGER,
		alcCuSvcMsgTrailer			DisplayString,

		-- ALC Cu Statistics

		alcCuStatusChanges			Counter,
		alcCuRxFrames				Counter,
		alcCuTxFrames				Counter,
		alcCuRxChars				Counter,
		alcCuTxChars				Counter,

		-- ALC Cu Trap Thresholds/Controls

		alcCuStatusTrapControl		INTEGER,
		alcCuDropped				Counter
		}

	alcCuIfIndex OBJECT-TYPE
		SYNTAX		INTEGER (1..100)
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"The line interface identifier that can be used to locate this IA."
		::= { alcCuEntry 1 }

	alcCuDescr OBJECT-TYPE
		SYNTAX		DisplayString (SIZE (0..255))
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"Name of this control unit."
		::= { alcCuEntry 2 }

	alcCuIA OBJECT-TYPE
		SYNTAX		INTEGER (1..100)
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"this control units IA"
		::= { alcCuEntry 3 }

	alcCuStatus OBJECT-TYPE
		SYNTAX		INTEGER {
			disabled		(1),
			enabledUp		(2),
			enabledDown		(3)
			}
		ACCESS		read-only
		STATUS		mandatory
		DESCRIPTION
			"What is this control units current status.
				enabledUp:		responding to polls,
				enabledDown:	not responding to polls."
		::= { alcCuEntry 4 }

	alcCuPollCmd OBJECT-TYPE
		SYNTAX		INTEGER {
			enable		(1),
			disable		(2),
			cascade		(3)
			}
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"  Mode		Function
			Primary		Should we be polling this CU?
						enabled		- polling & forwarding data,
						disabled	- not polling & not forwarding.
						cascade		- not polling but forwarding.
			Secondary	Should we respond to polls?
						enabled		- answer poll.
						disabled	- don't answer poll."
		::= { alcCuEntry 5 }

	alcCuOutQueueMsgSize OBJECT-TYPE
		SYNTAX		INTEGER (1..100)
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"(1..100 messages)  default=xx
			Defines the size of the queue (in messages) that holds
			outgoing messages (Port bound).
			UNITS: messages"
		::= { alcCuEntry 6 }

	alcCuOutQueueCharSize OBJECT-TYPE
		SYNTAX		INTEGER (1..10000)
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"(1..xx characters)  default=xx
			Defines the size of the queue (in characters) that holds
			outgoing messages (Port bound).
			UNITS: characters"
		::= { alcCuEntry 7 }

	alcCuN1MaxMsgSize OBJECT-TYPE
		SYNTAX		INTEGER (1..10000)
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"(1..xx characters) default=960
			Maximum length of a single message.
			UNITS: characters"
		DEFVAL		{ 1920 }
		::= { alcCuEntry 8 }

	alcCuT1PollRspTimer OBJECT-TYPE
		SYNTAX		INTEGER (1..10000)
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"Poll response timeout (default = 200 millisec) (PRIMARY)
			No response to a poll was received before this timeout.
			UNITS: milliseconds"
		DEFVAL		{ 200 }
		::= { alcCuEntry 9 }

	alcCuT2MaxRxTimer OBJECT-TYPE
		SYNTAX		INTEGER (1..65)
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"(1..65 seconds)  default=5 (PRIMARY)
			Timeout to ensure that the received messages are not overlength.
			Typically started at: start of poll, or receipt of first character,
			stopped at receipt of end of message.
			This is the maximum Rx time for a CU (including concatenated messages)
			This is considered a garbled msg, if exceeded.
			UNITS: seconds"
		DEFVAL { 5 }
		::= { alcCuEntry 10 }

	alcCuT4NoPollTime OBJECT-TYPE
		SYNTAX		INTEGER (1..10000)
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"No polls received within this time.
			(default = 3000 millisecs) (SECONDARY)
			UNITS: milliseconds"
		DEFVAL		{ 3000 }
		::= { alcCuEntry 11 }

	alcCuC1UpCounter OBJECT-TYPE
		SYNTAX		INTEGER (1..100)
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"Number of answered DEAD polls to declare a CU up.
			(default=1) (PRIMARY only)
			Equivalent to the secondary variable: alcCuN3PollsTillAlive
			UNITS: polls"
		DEFVAL		{ 1 }
		::= { alcCuEntry 12 }

	alcCuC2DownCounter OBJECT-TYPE
		SYNTAX		INTEGER (1..100)
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"Number of missed LIVE polls to declare a CU down.
			(default=3) (PRIMARY only)
			Equivalent to the secondary variable: alcN4PollsTillDead.
			UNITS: polls"
		DEFVAL		{ 3 }
		::= { alcCuEntry 13 }

	alcCuN2MaxMsgPerPoll OBJECT-TYPE
		SYNTAX		INTEGER (1..100)
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"maximum number of messages which can be sent to the ACS per POLL.
			(SECONDARY - multidrop, default=10)
			UNITS: messages"
		DEFVAL { 10 }
		::= { alcCuEntry 14 }

	alcCuMaxCharPerPoll OBJECT-TYPE
		SYNTAX		INTEGER (1..10000)
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"maximum number of characters which can be sent to the ACS per POLL.
			(default=xx) (SECONDARY)
			UNITS: characters"
		::= { alcCuEntry 15 }

	alcCuN3PollsTillAlive OBJECT-TYPE
		SYNTAX		INTEGER (1..100)
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"number of consecutive POLL commands to declare the
			CU/circuit available. (SECONDARY)
			Equivalent to the primary variable: alcC1UpCounter.
			UNITS: polls"
		::= { alcCuEntry 16 }

	alcCuN4PollsTillDead OBJECT-TYPE
		SYNTAX		INTEGER (1..100)
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"number of consecutive polling time-outs to declare the CU unavailable. (SECONDARY)
			Equivalent to the primary variable: alcC2DownCounter.
			UNITS: polls"
		::= { alcCuEntry 17 }

	alcCuIAResetOption OBJECT-TYPE
		SYNTAX		INTEGER {
			disabled	(1),
			enabled		(2)
			}
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"IA reset message is sent when the IA comes alive. (PRIMARY)
			The message is sent to the polled IA."
		DEFVAL		{ disabled }
		::= { alcCuEntry 18 }

	alcCuIAValidationOption OBJECT-TYPE
		SYNTAX		INTEGER {
			none				(1),
			responding-stream	(2),
			garbled				(3)
			}
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"IA Validation: possibly two CUs responding to the same address (PRIMARY)
			This flag is used with respect to the pollers point of view.

				none	- the message is forwarded on the stream associated with the
						  polled address, (such as for a Cascaded CU, which may send
						  multiple IAs)
				responding-stream	- the message is forwarded on the stream associated
									  with the IA in the responding message,
				garbled		- if the message has an IA that does not match the polled IA,
							  it is counted as a garbled message (alcInvalidAddresses) and
							  is dropped, otherwise it is forwarded on the stream associated
							  with the polled address."
		DEFVAL		{ garbled }
		::= { alcCuEntry 19 }

	alcCuRxCCCOption OBJECT-TYPE
		SYNTAX		DisplayString (SIZE (0..64))
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"(PRIMARY)
			a) <null> entry means no is message sent
			b) default is preconfigured IA Resend message
				'<CMD1>=0x1F, <CMD2>=0x38,<EOMc>'
			c) user can enter their own 'please re-enter' message response.
				Message must be fully configured: '<IA><TA><CMD1><CMD2><text><EOMc>'"
		::= { alcCuEntry 20 }

	alcCuMaxFrame OBJECT-TYPE
		SYNTAX		INTEGER (0..100)
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"Number of messages allowed to be sent to a given CU before
			having to poll all the other CUs on the line (default: 0 = disabled)
			UNITS: messages"
		DEFVAL		{ 0 }
		::= { alcCuEntry 21 }

	alcCuSvcMsgHeader OBJECT-TYPE
		SYNTAX		DisplayString (SIZE (0..64))
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"The is is the header that is sent out whenever the protocol module
			determines the need to send a service message.  This prefix is in the
			native character set of the protocol.  If the value of alcCuSvcMsgIndex
			is non-zero, then the prefix will be sent followed by the appropriate message
			followed by the trailer.

			Typically this header will be:
				<IA><broadcast TA><CMD1><CMD2>
			If applicable, the header must include the column and row
			number where the message must appear."
		::= { alcCuEntry 22 }

	alcCuSvcMsgIndex OBJECT-TYPE
		SYNTAX		INTEGER (1..100)
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"This provides the index into the service message table: 'svcmsgTable'.
			If this index is non-zero, the protocol (when it determines a message is required)
			will send the alcCuSvcMsgHeader followed by the appropriate message from this
			row in the svcmsgTable, followed by the alcCuSvcMsgTrailer.

			Both the header and the trailer are in the native character set of the protocol.
			However it is the responsibility of the protocol module to translate the
			text of the actual message into the native character set before transmission."
		::= { alcCuEntry 23 }

	alcCuSvcMsgTrailer OBJECT-TYPE
		SYNTAX		DisplayString (SIZE (0..64))
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"This is the trailer sent whenever a service message is sent.
			It is in the native character set of the protocol.
			It is only used if the value of alcCuSvcMsgIndex is non-zero.
			It will typically be: <EOMc>"
		::= { alcCuEntry 24 }

	--
	-- Control Unit Statistics
	--

	alcCuStatusChanges OBJECT-TYPE
		SYNTAX		Counter
		ACCESS		read-only
		STATUS		mandatory
		DESCRIPTION
			"A count of the number of times:
			a) no response to a live poll was received (PRIMARY),
			b) CU had polling stopped due to T1 timeouts."
		::= { alcCuEntry 25 }

	alcCuRxFrames OBJECT-TYPE
		SYNTAX		Counter
		ACCESS		read-only
		STATUS		mandatory
		DESCRIPTION
			"A count of the number of frames received for this CU."
		::= { alcCuEntry 26 }

	alcCuTxFrames OBJECT-TYPE
		SYNTAX		Counter
		ACCESS		read-only
		STATUS		mandatory
		DESCRIPTION
			"A count of the number of frames sent to this CU."
		::= { alcCuEntry 27 }

	alcCuRxChars OBJECT-TYPE
		SYNTAX		Counter
		ACCESS		read-only
		STATUS		mandatory
		DESCRIPTION
			"A count of the number of characters received from the CU."
		::= { alcCuEntry 28 }

	alcCuTxChars OBJECT-TYPE
		SYNTAX		Counter
		ACCESS		read-only
		STATUS		mandatory
		DESCRIPTION
			"A count of the number of characters sent to the CU."
		::= { alcCuEntry 29 }

	alcCuStatusTrapControl OBJECT-TYPE
		SYNTAX		INTEGER {
			disabled	(1),
			enabled		(2)
			}
		ACCESS		read-write
		STATUS		mandatory
		DESCRIPTION
			"If enabled, it allows the system to generate alcCuState traps,
			when the CU's status (alcCuStatus) changes to enabled-up,
			and enabled-down respectively."
		DEFVAL		{ disabled }
		::= { alcCuEntry 30 }

	alcCuDropped OBJECT-TYPE
		SYNTAX		Counter
		ACCESS		read-only
		STATUS		mandatory
		DESCRIPTION
			"A count of the number of messages dropped due message sent
			which is not being acknowledged by the CU."
		::= { alcCuEntry 31 }

	--
	-- Traps
	--
	-- This section defines the well-known notifications sent by ALC Cu agents.
	-- These are sent when the corresponding threshold is exceeded

	alcCuState TRAP-TYPE
		ENTERPRISE		alcCuTraps
		VARIABLES		{ alcCuIfIndex, alcCuIA, alcCuStatus, rs232PortIndex }
		DESCRIPTION
			"A trap that indicates that the Cu has changed state.
			When alcCuStatus is:

			enabledUp	- the CU has exceeded the alcCuC1UpCounter and is now declared up.
			enabledDown	- the CU has exceeded the alcCuC2DownCounter and is now declared down."
		::= 1

	END