Transition Networks SGPAT1013-105 User manual

SGPAT10xx-x05
Stand-alone Gigabit Ethernet PoE+ Media Converter
10/100/1000Base-T PoE+ PSE to 1000Base-X
User Guide
33719 Rev. C

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Contents
1. Introduction and Product Description .........................................................................................................4
SGPAT Family Portrait..............................................................................................................................................5
Port Locations and Layouts .....................................................................................................................................6
Specifications ..........................................................................................................................................................7
Power Consumption................................................................................................................................................7
Features ..................................................................................................................................................................8
Hardware Features..................................................................................................................................................9
Dimensions .......................................................................................................................................................... 10
6-Position DIP Switch ........................................................................................................................................... 11
6-Position DIP Switch Model Summary ............................................................................................................... 12
Status LEDs........................................................................................................................................................... 13
PSE Status LED Error Indicators............................................................................................................................ 13
2. Installation...............................................................................................................................................14
Safety Warnings and Cautions ............................................................................................................................. 14
Unpacking ............................................................................................................................................................ 15
Mounting Options................................................................................................................................................ 15
Desktop ............................................................................................................................................................ 15
Wall Mount....................................................................................................................................................... 15
DIN Rail............................................................................................................................................................. 15
Cabling ................................................................................................................................................................. 16
Installing Copper Cable..................................................................................................................................... 16
Installing Fiber Cable ........................................................................................................................................ 16
Powering .............................................................................................................................................................. 17
Power Connection............................................................................................................................................ 17
3. Product Features ......................................................................................................................................18
Auto-Negotiation ................................................................................................................................................. 18
Full-Duplex Network ............................................................................................................................................ 18
Half-Duplex Network (512-Bit Rule) .................................................................................................................... 18
AutoCross™ .......................................................................................................................................................... 18
Automatic Link Restoration.................................................................................................................................. 18
Remote Fault Detect (RFD) .................................................................................................................................. 19
Auto Power Reset (APR)....................................................................................................................................... 19
Active Link Pass Through (ALPT) .......................................................................................................................... 19
Energy Efficient Ethernet (EEE) ............................................................................................................................ 20
3-Port and 4-Port Operation (Redundant Fiber mode, Revertive mode, Port Isolation)..................................... 21
3-Port Model (SGPAT1040-205)........................................................................................................................ 21
3-Port Switch Mode.......................................................................................................................................... 21
3-Port Redundant Fiber Mode ......................................................................................................................... 21
4-Port Model (SGPAT1040-305)........................................................................................................................ 22
4-Port Switch Mode.......................................................................................................................................... 22
4-Port Redundant Fiber Mode ......................................................................................................................... 22
4-Port Dual-Converter Mode............................................................................................................................ 24
4. CLI Commands .........................................................................................................................................25
Connecting to the CONSOLE Port..................................................................................................................... 25
Terminal Emulator Settings.................................................................................................................................. 25
Command Summary ............................................................................................................................................ 25

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CLI Commands for Setting Advanced Features .................................................................................................... 27
Active Link Pass Through (ALPT) (a Command)................................................................................................ 27
CLI DIP Switch Override (c Command) ............................................................................................................. 28
Dual (2x) Converter Mode (d Command)......................................................................................................... 29
TP Energy Efficient Ethernet (EEE) Advertisement Mode (e Command) ......................................................... 30
Flow Control (f Command) ............................................................................................................................... 31
Get PSE Status Report (g Command)................................................................................................................ 32
Port Isolation Mode (I Command).................................................................................................................... 33
PSE Port Legacy Detect Mode (l Command) .................................................................................................... 34
Complete Configuration Status Report (m Command) .................................................................................... 35
Auto Negotiation (AN) enable for TP ports or AN disable with port forced mode (n Command) ................... 36
ALPT PD Power Reset (p Command) ................................................................................................................ 37
SFP Port Redundancy Mode (r Command)....................................................................................................... 38
SFP Port Mode (s Command) ........................................................................................................................... 40
Temperature of Converter (t Command).......................................................................................................... 42
Reset to Factory Defaults (x Command)........................................................................................................... 42
Messages.............................................................................................................................................................. 42
5. Troubleshooting .......................................................................................................................................43
Record System and Device Information............................................................................................................... 44
6. Power Supply Features and Specifications.................................................................................................45
Power Supply Specifications ................................................................................................................................ 45
Power Supply Dimensions.................................................................................................................................... 46
7. Service, Warranty, and Compliance Information........................................................................................47
Declaration of Conformity ................................................................................................................................... 47
Contact Us............................................................................................................................................................ 48
Record of Revisions .............................................................................................................................................. 48

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1. Introduction and Product Description
The SGPAT10xx-105 connects two different types of network segments (Fiber and Copper), while injecting PoE+
power through its copper RJ-45 copper port(s) (up to two supported).
The SGPAT10xx-105 is a 10/100/1000Base-T to 1000Base-SX/LX Gigabit Ethernet Media Converter, which easily
and affordably facilitates the connection between to differently cabled network segments, while also injecting
PoE+ power through the copper RJ-45 port.
PoE allows for the transmission of power over the same copper cables used to transmit data. PoE+ media
converters are Power Sourcing Equipment (PSE). The SGPAT media converter combines data received over a
fiber optic link with 56VDC input power to provide power and data to a Powered Device (PD) over twisted pair
cabling while complying with the IEEE802.3at PoE+ standard, which is also backwards compatible with the
IEEE802.3af PoE standard.
The converter is available in 2-port, 3-port, and 4-port versions and includes PD signature sensing and power
monitoring features. Active Link Pass Through (ALPT) is supported, which is an automatically activated version of
Link Pass Through (LPT) that allows the converter to detect the loss of Receive (Rx) signals on either fiber or
copper port and propagate the failure to the end devices, preventing the media converter from isolating those
link failures. During a Link Pass Through event, the Auto Power Reset feature will re-set the power to the end PD
device, ensuring it is ready to go when the LPT event is corrected.
Ordering Information / Configurations
SGPAT1013-105
10/100/1000Base-T PoE+ RJ-45 [100 m/328 ft.] to 1000Base-SX
850nm multimode (SC) [62.5/125um: 220m / 722 ft.]
[50/125um:550m / 1804 ft.] Link Budget: 8.5dB
SGPAT1039-105
10/100/1000Base-T PoE+ RJ-45 [100 m/328 ft.] to 1000Base-SX
850nm multimode (LC) [62.5/125um: 220m / 722 ft.]
[50/125um:550m / 1804 ft.] Link Budget: 8.0dB
SGPAT1040-105
10/100/1000Base-T PoE+ RJ-45 [100 m/328 ft.] to
100/1000Base-X Open SFP Slot
SGPAT1040-205
(1) 10/100/1000Base-T PoE+ RJ-45 [100 m/328 ft.] to (2)
100/1000Base-X Open SFP Slot
SGPAT1040-305
(2) 10/100/1000Base-T PoE+ RJ-45 [100 m/328 ft.] to (2)
100/1000Base-X Open SFP Slot
Power Supply Included: To order the corresponding country specific power supply, add the extension to the end
of the SKU (e.g., SGPAT1013-105-NA = North America; -LA = Latin America).

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Optional Accessories (sold separately)
SFP Modules
See the Transition Networks SFP page for our full line of SFP transceivers.
WMBL
Wall Mount Bracket 4” (102mm)
WMVD
DIN Rail Mount Bracket 5” (127mm)
CABLE-CCC-06
Console Cable - Cisco DB9 to RJ-45 Console Cable, Blue, 6 ft.
SGPAT Family Portrait

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Port Locations and Layouts
Port layouts and locations vary by model number as shown below.

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Specifications
The SGPAT10xx-0x5 was designed to meet the specifications below.
Standards
IEEE 802.3-2012, IEEE 802.at PSE-PoE+, IEEE 802.3U, IEEE 802.3ab, IEEE 802.3z,
IEEE 802.3x, IEEE 802.3az
Max Packet Size
10240 bytes
Max MAC Addresses
8k
Shared buffer memory
1Mbit
Dimensions
3.25” (82mm) W x 4.8” (122mm) D x 1.0” (25mm) L
Power Source
External AC/DC 56VDC power adapter
Power Consumption
56VDC, 1.17A, 65.5W (assumes both PoE ports are delivering the full 30W).
See Power Consumption table below.
Operating Temp.
0 to +45 deg. C (0 to +113 deg. F)
Storage Temp.
-40 to +85 deg. C (-40 to +185 deg. F)
Operating Humidity
5% to 95% (non-condensing)
Altitude
0-10,000 feet
Weight
2lbs. (0.90kg) SGPAT with packaging
Weight
1.55 lbs. (0.7 Kg.) SGPAT
Compliance
EN55022 Class A, EN55024, CE Mark, Power Supply is UL listed
Immunity Compliance
EN55024-2010
Safety Compliance
SGPAT: N/A. External AC-DC supply: CE mark, UL Listed.
Power Consumption
The table below shows SGPAT power consumption. The table shows SFP models (SGPAT1040-x05) loaded with
one or two TN-SFP-SXD (1000Base-SX) SFPs.
Model
Converter Power
PoE Power
SGPAT1013-105
43[email protected] (2.3W)
[email protected] (30W)
SGPAT1039-105
43[email protected] (2.3W)
[email protected] (30W)
SGPAT1040-105
43[email protected] (2.3W)
[email protected] (30W)
SGPAT1040-205
60[email protected] (3.4W)
537mA@55.8V (30W)
SGPAT1040-305
80[email protected] (4.5W)
1.07A@55.8V (60W)

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Features
 Wall mount, DIN Rail, or table top installation
 External AC/DC power supply included with country-specific power cord
 2-port 10/100/1000 copper to fiber media conversion with 802.3at PoE+ on the copper port
 Supports full 30 watts of power to each twisted pair port
 Various fiber versions available supporting fixed SC, fixed LC, and open SFP slots
 3-port version offers (1) RJ-45 PoE+ port and (2) open SFP slots, device can be configured as a 3-port
switch or as a 2-port media converter with redundant fiber links
 4-port version offers (2) RJ-45 PoE+ ports and (2) open SFP slots, device can be configured as a 4-port
switch (with or without redundant fiber) or as two independent PoE+ media converters
 SFP slots can support 100Base-FX, 1000Base-X, or SGMII based (MSA compliant) SFP modules
 Supports Auto-Negotiation, AutoCross, and Active Link Pass Through (ALPT), Auto Power Reset (APR)
integrated with ALPT, and Auto Link Restore
 Jumbo frame support
 LED indicators for power status; per port link, duplex, and activity status; and PoE status
 Twisted pair ports support IEEE 802.3az Energy Efficient Ethernet for power saving
 DIP switch control of basic feature configuration
 Command Line Interface (CLI) control of advanced configuration via RJ-45 serial port
 SFP Auto Speed Sensing (in 100/1000 mode) for each port
 Selectable SGMII mode for each fiber port
 Multiport SGPAT versions provide 3-port or 4-port switch mode or provide redundant fiber links with a
switchover (failover) time of less than 50 milliseconds
 Revertive or Non-Revertive when in Redundant fiber mode
 Switch mode or 2-Converter mode
 Data speeds: TP @ 10/100/1000Mbs; SFP @100FX/1000X/SGMII; Fixed optic @ 1000X.
 10/100/1000BaseT Twisted Pair Port: RJ45Connector; Automatic MDI/MDI-X selection; CAT5 UTP Cable
specification.

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Hardware Features
Full bandwidth 1000Mbps switching, non-blocking
4-Port version (SGPAT1040-305) allows enabling 2-Converter mode (two media converter mode)
 Ports 1 and 3 are one converter
 Ports 2 and 4 are another converter
 Each converter is totally isolated from the other both for data and functions (for example LPT
triggering on port 1 will only affect port 3 not port 4)
Active Link-Pass-Through (ALPT)
 Active LPT only operational in specific modes or ports counts; see DIP switch description for details
Interfaces:
 10/100/1000Mbs TP interface
 100FX/1000X/SGMII - SFP versions
 1000X –Fixed optic versions
 Full duplex ONLY on fiber ports
DIP switches to control SFP mode, Fiber redundancy on 2xSFP version, 2-Converter mode on 4xPort version
Jumbo frame support –10K bytes maximum
TP ports support IEEE 802.3az Energy Efficient Ethernet for power saving
DC option:
 2-Pin barrel: 52-57VDC
 Must use the provided external AC-DC adapter or you must ensure that the alternate power source
meets the IEEE 802.3at isolation requirements
IEEE 802.3at (Power Over Ethernet) PSE
 Provides full 30W of power to each TP port
 Units with LPT capability when enabled will auto-power-reset the POE power when LPT triggers
Temperature rating: 0 to +45 deg. C
RJ-45 serial port for CLI (Command Line Interface), use Cisco blue cable. Console port: RS-232 RJ-45 serial port
115200 baud.

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Dimensions
SGPAT dimensions are provided below in inches.

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6-Position DIP Switch
A 6-Position DIP Switch is provided for basic SGPAT configuration.
The DIP switch default is all in the UP position. The DIP switch default setting is valid
until CLI DIP Switch Override is Enabled (which is disabled by default).
See CLI DIP Switch Override (c Command) on page 28 for more information.
The DIP Switch settings are shown and described below.
Switch 1 Port 3: Up=100/1000 or Down=SGMII
Applies to these versions:
SGPAT1040-105
SGPAT1040-205
SGPAT1040-305
Switch 2 Port 4: Up=100/1000 or Down=SGMII
Applies to these versions:
SGPAT1040-205
SGPAT1040-305
Switch 3 ALPT: Up=Disabled or Down=Enabled
Applies to these versions:
SGPAT1013-105
SGPAT1039-105
SGPAT1040-105
SGPAT1040-205 with DIP Switch 4 down (Redundant mode enabled)
SGPAT1040-305 with DIP Switch 6 down (2-Converter mode enabled)
Switch 4 Redundant mode: Up-Normal or Down=Redundant
Applies to these versions:
SGPAT1040-205
SGPAT1040-305 with DIP Switch 6 Up (2-Converter mode disabled)
Switch 5 Revertive mode: Up=Revertive or Down=Non-revertive
Applies to these versions:
SGPAT1040-205
SGPAT1040-305 with DIP Switch 6 Up (2-Converter mode disabled)
Switch 6 2-Converter mode: Up=Disabled or Down=Enabled
Applies to this version:
SGPAT1040-305

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6-Position DIP Switch Model Summary
The DIP switch default is all in the UP position. The DIP switch default setting is valid until CLI DIP Switch Override
is Enabled (it is disabled by default). The DIP Switch functions are summarized by model number below.
Model
Description
SGPAT1013-105
DIP SW 1: Reserved
DIP SW 2: Reserved
DIP SW 3: ALPT: UP=Disabled, DOWN=Enabled
DIP SW 4: Reserved
DIP SW 5: Reserved
DIP SW 6: Reserved
SGPAT1039-105
DIP SW 1: Reserved
DIP SW 2: Reserved
DIP SW 3: ALPT: UP=Disabled, DOWN=Enabled
DIP SW 4: Reserved
DIP SW 5: Reserved
DIP SW 6: Reserved
SGPAT1040-105
DIP SW 1: Port 2 100/1000 or SGMII mode: UP=100/1000, DOWN=SGMII
DIP SW 2: Reserved
DIP SW 3: ALPT: UP=Disabled, DOWN=Enabled
DIP SW 4: Reserved
DIP SW 5: Reserved
DIP SW 6: Reserved
SGPAT1040-205
DIP SW 1: Port 2 100/1000 or SGMII mode: UP=100/1000, DOWN=SGMII
DIP SW 2: Port 3 100/1000 or SGMII mode: UP=100/1000, DOWN=SGMII
DIP SW 3: ALPT: UP=Disabled, DOWN=Enabled*
DIP SW 4: Redundant mode: UP=Normal, DOWN=Redundant
DIP SW 5: Revertive mode: UP=Revertive, DOWN=Non-Revertive (See Note 1)
DIP SW 6: Reserved
SGPAT1040-305
DIP SW 1: Port 3 100/1000 or SGMII mode: UP=100/1000, DOWN=SGMII
DIP SW 2: Port 4 100/1000 or SGMII mode: UP=100/1000, DOWN=SGMII
DIP SW 3: ALPT: UP=Disabled, DOWN=Enabled (See Note 3)
DIP SW 4: Redundant mode: UP=Normal, DOWN=Redundant (See Note 2)
DIP SW 5: Revertive mode: UP=Revertive, DOWN=Non-Revertive (See Note 1)
DIP SW 6: 2-Converter mode: UP=Disabled, DOWN=Enabled
Note 1: Available only when Redundant mode is active or enabled.
Note 2: Available only when 2-Converter mode is not active or disabled.
Note 3: Available only when 2-Converter mode is active or enabled.

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Status LEDs
The SGPAT front panel Status LEDs are shown and described below.
PWR: On = Power being applied to converter
PoE+:Off = No PD detected
On (green) = Power Applied
On (yellow) = Detected Fault
On (yellow Blink) = PoE Classification Fault
TP – Left LED per Port: On (Yellow) = Half Duplex Link
Blink (Yellow) = Half Duplex Activity
On (Green) = Full Duplex Link
Blink (Green) = Full Duplex Activity
TP – Right LED per port: Off = 10Mbps
Yellow = 100Mbps
Green = 1000Mbps
Fiber L/A – per port: 100FX/1000X mode:
On (Yellow) = Link
Blink (Yellow) = Activity
On (Green) = Link
Blink (Green) = Activity
SGMII Mode:
On (Green) = Link
Blink (Green) = Activity
PSE Status LED Error Indicators
1 Blink Yellow = Measured Resistance Signature (Rsig) too Low. End device signature resistance is too low (300
ohm to 15K ohm detected).
2 Blink Yellow = Measured Rsig to High. End device signature resistance is too high (33K ohm to 500K ohm
detected).
4 Blink Yellow = Measured Capacitance (Cpd) too High.
5 Blink Yellow = PD Over Current Condition. Power overload fault.
6 Blink Yellow = PD Other error (Power or Time Out error).

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2. Installation
Safety Warnings and Cautions
WARNING: Visible and invisible laser radiation when open. Do not stare into the beam or view the beam directly
with optical instruments. Failure to observe this warning could result in an eye injury or blindness.
WARNING: Use of controls, adjustments or the performance of procedures other than those specified herein
may result in hazardous radiation exposure.
Copper based media ports, e.g., Twisted Pair (TP) Ethernet, USB, RS232, RS422, RS485, DS1, DS3, Video Coax,
etc., are intended to be connected to intra-building (inside plant) link segments that are not subject to lightening
transients or power faults.
Copper based media ports, e.g., Twisted Pair (TP) Ethernet, USB, RS232, RS422, RS485, DS1, DS3, Video Coax,
etc., are NOT to be connected to inter-building (outside plant) link segments that are subject to lightening
transients or power faults.
Warning Class 1 laser product.
Warning Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into
beams or view directly with optical instruments.
Warning Use of controls, adjustments, or performing procedures other than those specified may result in
hazardous radiation exposure.
Laser safety standards:
• Class 1 LASER PRODUCT (IEC 60825-1 2001-01)
• Class I LASER PRODUCT (complies with 21 CFR 1040.10 and 1040.11 except for deviations pursuant to Laser
Notice 50, dated July 26, 2001)
All fiber-optic ports have been tested and comply with the Class 1 limits of IEC 60825-1 and Class I limits of 21
CFR 1040.10.
Waarschuwing Klasse-1 laser produkt.
Varoitus Luokan 1 lasertuote.
Attention Produit laser de classe 1.
Warnung Laserprodukt der Klasse 1.
Avvertenza Prodotto laser di Classe 1.
Advarsel Laserprodukt av klasse 1.
Aviso Produto laser de classe 1.
¡Advertencia! Producto láser Clase I.
Varning! Laserprodukt av klass 1.
Aviso Produto a laser de classe 1.
Advarsel Klasse 1 laserprodukt.

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Unpacking
Verify that you have received the following items. Contact your sales representative if any item is missing.
Please save the packaging for possible future use.
□ One SGPAT10xx-x05 PoE+ Converter
□ One Cisco blue cable
□ One Documentation Postcard
□ Four Rubber Feet
□ Power Supply (option – sold separately)
Mounting Options
The SGPAT can be installed by wall mounting, DIN Rail, or table top installation.
Desktop
Remove the supplied four Rubber Feet from the adhesive-backed card and install on the bottom of the SGPAT.
Wall Mount
Use the option kit WMBL (4” Wall Mount Bracket) to mount the SGPAT on a wall. See the related manual for
mounting specs and instructions.
DIN Rail
Use the option kit WMVD (5” DIN Rail Mount Bracket) to mount the SGPAT on a DIN Rail. See the related manual
for mounting specs and instructions.

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Cabling
Perform all configuration and cabling before powering the SGPAT.
Installing Copper Cable
1. Locate an Ethernet 10/100/1000Base-TX compliant copper cable with male RJ-45 connectors installed at both
ends.
2. Connect the RJ-45 connector at one end of the cable to the SGPAT’s Ethernet 10/100/1000Base-RJ-45 port.
3. Connect the RJ-45 connector at the other end of the cable to the Ethernet 10/100/1000Base-RJ-45 port on
the other device (IP camera, VOIP phone, WAP, etc.).
Note: The AutoCross feature allows the use of either straight-through or crossover configuration cables.
Installing Fiber Cable
1. Locate a 1000Base-X compliant fiber cable with male, two-stranded TX to RX connectors installed at both
ends.
2. Connect the fiber cables to the media converter’s 1000Base-X fiber port as described below:
• Connect the male TX cable connector to the female TX connector.
• Connect the male RX cable connector to the female RX connector.
3. Connect the fiber cables to the 1000Base-X fiber port on the other device (another media converter, hub, etc.)
as described below:
• Connect the male TX cable connector to the female RX connector.
• Connect the male RX cable connector to the female TX connector.

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Powering
You must either a) use the provided external AC-DC adapter or b) ensure that the alternate power source meets
the IEEE 802.3at isolation requirements. Perform all configuration and cabling before powering the SGPAT.
Power Connection
Use the supplied AC power adapter to power the SGPAT standalone converter. To connect power to the SGPAT:
1. Connect the barrel connector on the power adapter cord to the power connector on the media converter
56VDC INPUT as shown below.
2. Plug the power adapter AC plug into AC power.
3. Verify that the SGPAT has powered UP - the power LED on the front panel is lit.

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3. Product Features
The 3-Port model (SGPAT1040-205) provides redundancy / revertive mode operation.
The 4-Port model (SGPAT1040-305) acts like two different converters: a) 4-port switch mode, or b) acts like two
media converters in one device.
Applications include a) SGPAT Connected to IP Camera (PD); b) SGPAT Connected to PoE Splitter; and c) Link Pass
Through.
Auto-Negotiation
The Auto-Negotiation feature allows the SGPAT10xx to automatically configure itself to achieve the best
possible mode of operation over a link. The media converter broadcasts its speed (100 Mb/s, or 1000 Mb/s) and
duplex capabilities (full or half) to the other devices and negotiates the best mode of operation. Auto-
Negotiation allows quick and easy installation because the optimal link is established automatically. No user
intervention is required to determine the best mode of operation.
A scenario where the media converter is linked to a non-negotiating device is a case where you may want to
disable Auto-Negotiation. In this instance, the mode of operation will drop to the lowest common denominator
between the two devices (e.g. 100 Mb/s, half-duplex). Disabling this feature lets you to force the connection to
the best mode of operation.
Note: The SGPAT10xx-13x supports 1000 Mbps fiber Auto-Negotiation.
Full-Duplex Network
In a full-duplex network, maximum cable lengths are determined by the type of cables that are used.
See the cable specifications for the different SGPAT models. The 512-Bit Rule does not apply in a full-duplex
network.
Half-Duplex Network (512-Bit Rule)
In a half-duplex network, the maximum cable lengths are determined by the round trip delay limitations of each
Fast Ethernet collision domain. (A collision domain is the longest path between any two terminal devices, e.g. a
terminal, switch, or router.) The 512-Bit Rule determines the maximum length of cable permitted by calculating
the round-trip delay in bit-times (BT) of a particular collision domain. If the result is less than or equal to 512 BT,
the path is good. For more information on the 512-Bit Rule, see the white paper titled “Collision Domains” on
the Transition Networks website at: https://www.transition.com.
AutoCross™
The AutoCross feature allows either straight-through (MDI) or crossover (MDI-X) cables to be used when
connecting to devices such as hubs, transceivers, or network interface cards (NICs). AutoCross determines the
characteristics of the cable connection and automatically configures the unit to link up, regardless of the cable
configuration.
Automatic Link Restoration
The SGPAT will automatically restore the link between networked devices after a fault condition has been
corrected. In contrast, products from competitors generally require the user to power down, then power up the
converters after a fault condition has been corrected.

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Remote Fault Detect (RFD)
The RFD feature applies to 1000Mbps operation only. Remote Fault Detect (RFD) is a troubleshooting feature
found on Gig Ethernet copper-to-fiber media converters. By enabling RFD on the remotely located media
converter, the status of the fiber link will be monitored and any link failures will be reported back to the local
converter. If the remote converter loses its fiber RX signal, RFD will force the converter to shut down its fiber TX
port. If Link Pass Though is enabled on both ends, then the copper ports will also be shut down to notify both
end devices of the link failure. (With Remote Fault Detect enabled, if the converter only loses an RX Fiber signal,
LPT will still notify both linked devices.)
Auto Power Reset (APR)
During an Active Link Pass Through event, the Auto Power Reset feature will re-set the power to the end PD
device, ensuring it is ready to go when the LPT event is corrected. When a fiber port loses link, the PoE power
will be cycled on the copper (TP) port.
Auto Power Reset requires both Dual Converter mode and ALPT mode to be enabled. Also, there are timers that
must complete before a first ALPT event can trigger a power-reset and also before subsequent ALPT events can
trigger subsequent power resets. The timers prevent link flapping on devices where the link goes up and down
during the boot process.
Active Link Pass Through (ALPT)
Active Link Pass Through (ALPT) is supported, which is an automatically activated version of Link Pass Through
(LPT) that allows the converter to detect the loss of Receive (Rx) signals on either fiber or copper port and
propagate the failure to the end devices, preventing the media converter from isolating those link failures.
During an ALPT event, the Auto Power Reset feature will re-set the power to the end PD device, ensuring it is
ready to go when the ALPT event is corrected.
Note: ALPT is only operational in specific modes or ports counts; see DIP switch description for details).
Link Pass-Through is a troubleshooting feature that allows the media converter to monitor both the fiber and
copper RX ports for loss of signal. With the loss of RX signal on one media port, the converter will automatically
disable the TX signal of the other media port, thus “passing through” the link loss. With LPT, the end device
automatically notified of link loss; this helps prevent loss of valuable data unknowingly transmitted over invalid
link.
Active LPT is a form of LPT that requires the links to become Active before LPT becomes Active. ALPT has two
states: Diagnostic and Active. The media converter enters the Diagnostic state when either of the following
conditions is met:
 Upon power-up of the converter.
 Upon removing the converter’s SFP module (if equipped).
In the Diagnostic state, the link for each of the media converter’s ports can come up independently of each
other, just like a converter that has no LPT functionality, or a converter that has LPT is disabled. The Diagnostic
state is helpful during first power up, before all links of a circuit are connected, as it allows the installer to see
each link turn on as the cables are plugged in. It’s also helpful for finding the location of a fault, if one exists.
The media converter remains in the Diagnostic state until the link status for both of the media converter’s ports
are up, simultaneously.

Transition Networks SGPAT10xx-x05 PoE+ Converter User Guide
33719 Rev. C https://www.transition.com Page 20 of 49
After that condition is met, ALPT enters the Active state. It remains in the Active state until the converter is
either powered down, or its SFP module is removed. In the Active state, Active LPT works as shown below (the
same as when regular LPT is enabled).
Energy Efficient Ethernet (EEE)
The SGPAT twisted pair ports support IEEE 802.3az Energy Efficient Ethernet for power saving. Energy efficient
Ethernet can significantly reduce the power consumption of the device over a period of time especially when
there is a large amount of idle signals on the copper port. IEEE standard 802.3az which implements a Low Power
Idle mode on copper interfaces with internal PHYs. SGPAT TP Ports have the EEE Low Power Idle mode enabled.
Note that the Link LED remains lit when in low power mode.
The amount of delay experienced while waiting for the copper interfaces to wake up and come out of low power
idle mode is determined by the speed of the port:
Delay = ASSERT TIME + WAKE TIME
For 1000 Base, delay = 0 + 17us = 17us. For 100 Base, delay = 0 + 30us = 30us.
EEE Low Power Idle mode requires the copper port to advertise via the auto negotiation registers the ability to
support EEE for both 1000Base-T and 100Base-T. Both local and remote ports must indicate they can support
low power idle mode before the port can initiate a low power idle state.
During Auto –Negotiation the Port EEE capabilities are exchanged using the next page process to establish the
speed and duplex information. Timer information with regards to tx_idle, assert and wake cycles are set in
SGPAT registers by the CPU. When a port egress queue remains empty for a specific period of time set by the
EEE TX_IDLE Timer register, then a low power state can be entered. The default setting for the TX_IDLE is 2
milliseconds.
After the TX_IDLE time the PHY will start the assert timer. The Assert timer will require the SGPAT to wait until
the assert timer is zero before a wake up request can be processed. Currently the default Assert timer is set to 0,
giving the PHY the ability to immediately start processing a request to leave the low power idle state. The PHY
then enters low power idle mode. This mode is defined by a 22.35 millisecond quiet period followed by a 210
microsecond refresh pulse. Then once a port sends a packet and the egress queue is no longer empty a wake up