This object describes the Small Form-Factor Pluggable (SFP) cages and the transceivers hosted in them. The object definition is based on parts of {{bibref|SFF-8024}} and {{bibref|SFF-8472}}. This data model is extensible to support new SFP management protocol standards in the future. {{numentries}} This object describes a cage into which an SFP is inserted. This object can also describe an instance of Small Form Factor (SFF) units soldered on to the platform. The internal name used to identify the SFP Cage instance. The value {{true}} indicates the presence of a SFP in the SFP Cage instance. The value is always {{true}} for a SFF. Note: A value of 0x02 in {{param|SFF8024Identifier}} will also indicate the presence of an SFF. Ths identifier describes the type of SFP and the management protocol as per "Identifier Value" listed in {{bibref|SFF-8024|Table 4-1}}. This parameter indicates the management interface used by the SFP. Refer {{bibref|SFF-8024|Table 4-1}} and {{bibref|SFF-8472}}. SFF 8472 Unknown Mgmt Interface This value is applicable only when {{param|SFPPresent}} is {{true}}. The SFP Type is classified as one of: GPON, XGS-PON, Optical Ethernet, Copper Ethernet. If the SFP Type cannot be classified, the value is reported as "Unsupported". Unclassified SFP GPON SFP XG-PON SFP NG-PON2 SFP XGS-PON SFP EPON SFP MoCA SFP Optical Ethernet Electrical Ethernet The path to the SFP management object associated with this interface. This object describes the elements of a SFP that are exposed through the given Managment interface. {{numentries}} This object describes an SFP in a cage or the SFF present that can be managed as per SFF-8472 standard. The internal name used to identify this SFP instance. This object describes the Transceiver present in the SFP. The Transceiver object here models the electrical interface to the SFP from the host and the function that enables transmission and reception of electrical or optical signals over the link connected. The Transceiver object is agnostic of the underlying protocol used in the transmission. The connector value as per {{bibref|SFF-8024|Table 4-3}} indicates the external optical or electrical cable connector provided as the media interface. This field contains code for electronic or optical compatibility as per {{bibref|SFF-8472|Table 5-3}} and {{bibref|SFF-8024|Table 4-4}}. It corresponds to the values of DMM address 0xA0, bytes 3-10 and 36. The associated bit significant indicators (as identified in the above referenced tables) define the electronic or optical interfaces that are supported by the transceiver. At least one bit will be set in this field. This contains the code for high speed serial encoding algorithm as per {{bibref|SFF-8024|Table 4-2}}. This field contains the Nominal bit signaling rate, in units of {{units}} as per {{bibref|SFF-8472|Section 5-6}}. The bit rate includes those bits necessary to encode and delimit the signal as well as those bits carrying data information. A value of 0 indicates that the bit rate is not specified and must be determined from the transceiver technology. If the value is 255 (indicating 25.4GBd) then {{param|BRMax}} contains rate in units of 250MBd. The rate identifier byte as per {{bibref|SFF-8472|Table 5-6}} refers to several (optional) industry standard definitions of Rate_Select or Application_Select control behaviors, intended to manage transceiver optimization for multiple operating rates. The vendor name is a string contains ASCII characters that contain the full name of the corporation, a commonly accepted abbreviation of the name of the corporation, the SCSI company code for the corporation, or the stock exchange code for the corporation. At least one of VendorName or VendorOUT shall contain valid data. The vendor organizationally unique identifier field (vendor OUI) is a string that contains the IEEE Company Identifier for the vendor. An empty value indicates that the vendor OUI is unspecified. The vendor part number provided by Transceiver vendor is a string of maximum 16 ASCII characters. An empty string indicates that the vendor PN is unspecified. The vendor revision number provided by Transceiver vendor is a string of maximum 4 ASCII characters. An empty string indicates that the vendor revision is unspecified. This is the upper bit rate margin in units of 1%, within which the transceiver will still meet its specifications (BR, max) is specified in units of 1% above the nominal bit rate. A value of zero indicates that this field is not specified. However this field may contain the nominal bit rate in units of 250MBd if the value in {{param|BRNominal}} is 255. See {{bibref|SFF-8472|Section 8.4}} - Address 0xA0, Byte 66. This is the lower bit rate margin in units of {{units}}, within which the transceiver will still meet its specifications (BR, min) is specified in units of 1{{units}} below the nominal bit rate. A value of zero indicates that this field is not specified. However this field may also specify range of signaling rates specified in units of +/- 1{{units}} around the nominal signaling rate. See {{bibref|SFF-8472|Section 8.5}} - Address 0xA0, Byte 67. The serial number provided by the Transceiver vendor is a string of maximum 16 ASCII characters. An empty string indicates that the vendor SN is unspecified. The transceiver vendor date code. The format is YYMMDDLL where YY - year (00 = 2000), MM - month (01 = January), DD - day (01 to 31), LL - optional vendor lot code. This value specifies the link length in {{units}} that is supported by the transceiver while operating in compliance with the applicable standards using single mode fiber. The value is in units of kilometers. A value of 255 means that the transceiver supports a link length greater than 254 km. A value of zero means that the transceiver does not support single mode fiber or that the length information must be determined from the transceiver technology. This value specifies the link length that is supported by the transceiver while operating in compliance with the applicable standards using single-mode fiber. The value is in units of {{units}}. A value of 255 means that the transceiver supports a link length greater than 25.4 km. A value of zero means that the transceiver does not support single-mode fiber or that the length information must be determined from the transceiver technology. This value specifies link length that is supported by the transceiver while operating in compliance with applicable standards using 50 micron multimode OM2 [500MHz*km at 850nm,] fiber. The value is in units of {{units}}. A value of 255 means that the transceiver supports a link length greater than 2.54 km. A value of zero means that the transceiver does not support 50 micron multimode OM2 fiber or that the length information must be determined from the transceiver technology. This value specifies link length that is supported by the transceiver while operating in compliance with applicable standards using 62.5 micron multimode OM1 [200 MHz*km at 850nm, 500 MHz*km at 1310nm] fiber. The value is in units of {{units}} . A value of 255 means that the transceiver supports a link length greater than 2.54 km. A value of zero means that the transceiver does not support 62.5 micron multimode fiber or that the length information must be determined from the transceiver technology. This value specifies link length that is supported by the transceiver while operating in compliance with applicable standards using 50 micron multimode OM3 [2000 MHz*km] fiber. The value is in units of {{units}}. A value of 255 means that the transceiver supports a link length greater than 2.54 km. A value of zero means that the transceiver does not support 50 micron multimode OM3 fiber or that the length information must be determined from the transceiver technology. This value denotes the nominal transmitter output wavelength at room temperature measured in {{units}}. This field allows the user to read the laser wavelength directly, so it is not necessary to infer it from the transceiver “Code for Electronic Compatibility”. This also allows specification of wavelengths not covered in those fields, such as those used in coarse WDM systems. The value indicates which revision of SFF requirements the transceiver complies with. See {{bibref|SFF-8472|Table 8-8}}. A value of {{false}} identifies a conventional uncooled (or unspecified) laser implementation. A value of {{true}} identifies a cooled laser transmitter implementation. See {{bibref|SFF-8472|Table 8-3}}. A value of {{false}} identifies Power Level 1 (or unspecified) requirements. A value of {{true}} identifies Power Level 2 requirement. See {{bibref|SFF-8472|Table 8-3}}. A value of {{false}} identifies a conventional limiting (or unspecified) receiver output. A value of {{true}} identifies a linear receiver output. See {{bibref|SFF-8472|Table 8-3}}. A value of {{true}} indicates that the optional RATE_SELECT functionality is implemented. See {{bibref|SFF-8472|Table 8-3}}. A value of {{true}} indicates that the optional TX_DISABLE functionality is implemented. See {{bibref|SFF-8472|Table 8-3}}. A value of {{true}} indicates that the optional Tx Fault monitoring is implemented. See {{bibref|SFF-8472|Table 8-3}}. A value of {{true}} indicates that Loss of Signal implemented with signal inverted from standard definition in SFP MSA (called “Signal Detect”) as per {{bibref|SFF-8472|Table 8-3}}. A value of {{true}} indicates that this optional transceiver signal for Loss of signal is implemented. See {{bibref|SFF-8472|Table 8-3}}. A value of {{true}} indicates that Digital Diagnostic monitoring is implemented. See {{bibref|SFF-8472| Section 8-8}}. If set to {{true}}, received power monitoring, transmitted power monitoring, bias current monitoring, supply voltage monitoring and temperature monitoring are all implemented. A value of {{true}} indicates that transceiver is Internally calibrated. The transceiver directly reports calibrated values in units of current, power etc. A value of {{true}} indicates that transceiver is Externally calibrated. The reported values are A/D counts which must be converted to real world units using calibration values read using additional information from the SFP memory. This value indicates the Received power measurement type. If {{true}}, average received power is monitored. If {{false}}, OMA is monitored. A value of {{true}} indicates that Alarms/Warnings flags for monitored quantities are implemented in the transceiver. See {{bibref|SFF-8472|Table 8-6}}. A value of {{true}} indicates that Soft TX_DISABLE control and monitoring is implemented in the transceiver. See {{bibref|SFF-8472|Table 8-6}}. A value of {{true}} indicates that soft TX_FAULT monitoring is implemented in the transceiver. See {{bibref|SFF-8472|Table 8-6}}. A value of {{true}} indicates that soft RX_LOS is implemented in the transceiver. See {{bibref|SFF-8472|Table 8-6}}. A value of {{true}} indicates that this soft Rate Select and Control is implemented in the transceiver. See {{bibref|SFF-8472|Table 8-6}}. A value of {{true}} indicates that application rate select feature is implemented in the transceiver. See {{bibref|SFF-8472|Table 8-6}}. A value of {{true}} indicates that Soft Rate Select as per SFF-8431 is implemented in the transceiver. See {{bibref|SFF-8472|Table 8-6}}. A value of {{true}} indicates Power Level Operation control and status is implemented in transceiver. See {{bibref|SFF-8472|Table 10-1}}. A value of {{true}} enables selection of power level to transmit. See {{bibref|SFF-8472|Table 10-1}}. Each alarm and warning quantity has a corresponding high alarm, low alarm, high warning and low warning threshold. These factory preset values allows the determination of when a particular value is outside of “normal” limits as determined by the transceiver manufacturer. It is assumed that these values will vary with different technologies and different implementations and are vendor specific. The values here represent the values after any required calibration. See {{bibref|SFF-8472|Table 9-5}}. Temperature, measured in {{units}}, at which a high temperature alarm will be triggered. Temperature, measured in {{units}}, at which a high temperature warning will be triggered. Temperature, measured in {{units}}, below which a low temperature warning will be triggered. Temperature, measured in {{units}}, below which a low temperature alarm will be triggered. Voltage, measured in {{units}}, above which a high Vcc alarm will be triggered. Voltage, measured in {{units}}, above which a high Vcc warning will be triggered. Voltage, measured in {{units}}, below which a low Vcc warning will be triggered. Voltage, measured in {{units}}, below which a low Vcc alarm will be triggered. Tx Bias, current measured in {{units}}, above which a High Tx Bias alarm will be triggered. Tx Bias, current measured in {{units}}, above which a High Tx Bias warning will be triggered. Tx Bias, current measured in {{units}}, below which a Low Tx Bias warning will be triggered. Tx Bias, current measured in {{units}}, below which a Low Tx Bias alarm will be triggered. Tx Power, measured in {{units}}, above which a High Tx Power alarm will be triggered. Tx Power, measured in {{units}}, above which a High Tx Power warning will be triggered. Tx Power, measured in {{units}}, below which a Low Tx Power warning will be triggered. Tx Power, measured in {{units}}, below which a Low Tx Power alarm will be triggered. Rx Power, measured in {{units}}, above which a High Rx Power alarm will be triggered. Rx Power, measured in {{units}}, above which a High Rx Power warning will be triggered. Rx Power, measured in {{units}}, below which a Low Rx Power warning will be triggered. Rx Power, measured in {{units}}, below which a Low Rx Power alarm will be triggered. This object contains real time diagnostic and control values and status fields. See {{bibref|SFF-8472|Table 9-16}}. The CPE MUST reset the interface’s Stats parameters (unless otherwise stated in individual object or parameter descriptions) either when the interface becomes operationally down due to a previous administrative down (i.e. the interface’s Status parameter transitions to a down state after the interface is disabled) or when the interface becomes administratively up (i.e. the interface’s Enable parameter transitions from false to true). Administrative and operational interface status is discussed in [Section 4.2.2/TR-181i2]. Internally measured module temperature measured in {{units}}. See {{bibref|SFF-8472|Table 9-16}}. A value of -274 indicates that a good reading could not be obtained. Internally measured supply voltage in transceiver measured in {{units}}. See {{bibref|SFF-8472|Table 9-16}}. Internally measured TX Bias Current measured in {{units}}. See {{bibref|SFF-8472|Table 9-16}}. Measured TX output power measured in {{units}}. See {{bibref|SFF-8472|Table 9-16}}. Measured RX input power measured in {{units}}. See {{bibref|SFF-8472|Table 9-16}}. The digital state of the TX Disable Input Pin. Updated within 100ms of change on pin. See {{bibref|SFF-8472|Table 9-16}}. This optional status control bit allows software disable of laser. See {{bibref|SFF-8472|Table 9-16}}. Setting this flag {{true}} disables the laser. If Soft TX Disable is not implemented, the transceiver ignores the value of this bit. Default power up value is zero/low. An optional digital state of SFP input pin AS(1) per {{bibref|SFF-8079}} or RS(1) per {{bibref|SFF-8431}}. Updated within 100ms of change on pin. See 0xA2 Byte 118, Bit 3 for Soft RS(1) Select control information. See {{bibref|SFF-8472|Table 9-16}}. An optional digital state of SFP input pin AS(0) Rate_Select State [aka. “RS(0)”]. Updated within 100ms of change on pin. Note: This pin is also known as AS(0) in {{bibref|SFF-8079}} and RS(0) in {{bibref|SFF-8431}}. See {{bibref|SFF-8472|Table 9-16}}. Soft Rate_Select Select (aka. “RS(0)”). An optional Status or Control Bit. This flag allows software rate select control. Setting this flag {{true}} selects full bandwidth operation. This bit is logical OR with the hard Rate_Select, AS(0) or RS(0) pin value. Default at power up is logic zero/low. If Soft Rate Select is not implemented, the transceiver ignores the value of this bit. Note: Specific transceiver behaviors of this bit are identified in referenced documents. See {{bibref|SFF-8472|Table 9-16}}. An optional digital state of the TX Fault Output Pin. Updated within 100ms of change on pin. See {{bibref|SFF-8472|Table 9-16}}. An optional digital state of the RX_LOS Output Pin. Updated within 100ms of change on pin. An optional flag that indicates the transceiver has achieved power up and data is ready. The flag remains high until data is ready to be read at which time the device sets the bit low. The default value SHOULD be false. See {{bibref|SFF-8472|Table 9-16}}. This object contains the state of the SFP internal Diagnostic Alarms Flags {{bibref|SFF-8472|Table 9-17}}. Set to {{true}} when the internal temperature exceeds the high alarm level. Set to {{true}} when the internal temperature is below the low alarm level. Set to {{true}} when the internal supply voltage exceeds the high alarm level. Set to {{true}} when the internal supply voltage is below the low alarm level. Set to {{true}} when the TX Bias current exceeds the high alarm level. Set to {{true}} when the TX Bias current is below the low alarm level. Set to {{true}} when the TX output power exceeds the high alarm level. Set to {{true}} when the TX output power is below the low alarm level. Set to {{true}} when the Received Power exceeds the high alarm level. Set to {{true}} when the Received Power is below the low alarm level. This object contains the state of the SFP internal Diagnostic Warning Flags {{bibref|SFF-8472|Table 9-17}}. Warning flags indicate conditions outside the normally guaranteed bounds but not necessarily causes of immediate link failures. Certain warning flags may also be defined by the manufacturer as end-of-life indicators (such as for higher than expected bias currents in a constant power control loop). A flag is set for each warning that is active. Implementation is vendor specific. A SFP module has the ability to monitor and warn on a high or low readings for a number of situations. This ability is internal to the SFP and is part of the digital diagnostic interface common to many SFPs. The associated field changes from {{false}} to {{true}} to signal a warning and changes from {{true}} to {{false}} to indicate that the warning has cleared. It is recommended that detection of an asserted flag bit will be verified by a second read of the flag at least 100ms later. Set to {{true}} when the internal temperature exceeds the high warning level. Set to {{true}} when the internal temperature is below the low warning level. Set to {{true}} when the internal supply voltage exceeds the high warning level. Set to {{true}} when the internal supply voltage is below the low warning level. Set to {{true}} when the TX Bias current exceeds the high warning level. Set to {{true}} when the TX Bias current is below the low warning level. Set to {{true}} when the TX output power exceeds the high warning level. Set to {{true}} when the TX output power is below the low warning level. Set to {{true}} when the Received Power exceeds the high warning level. Set to {{true}} when the Received Power is below the low warning level.