DMSI PMF31855 User manual
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PMF31855
Stand-Alone Gigabit Ethernet
PoE Media Converter
DMSI Media Converter, Power Over Ethernet PoE,
10/100/1000Mbps, RJ45 to Duplex LC SFP,
850nm wavelength, 550 meter distance
www.dmsimfg.com
You can also nd the manual online at:
www.dmsimfg.com/PMF31855
www.dmsimfg.com
You can also nd the manual online at:
www.dmsimfg.com/PMF31855
CONTENT
Overview
Introduction
Cables
Specications
Packing List
Safety Precaution
Hardware Description
Front Panel
Back Panel
Bottom View
LED Indicators
DIP Switch
Fiber Port
Cabling
Network Connection
Installation
Troubleshooting
1
1
2-3
3
3
4
4
5
6
7-10
11
12
13
14-16
17
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OVERVIEW
INTRODUCTION
The PMF31855 media converter allows the user to connect ber
to copper to power PoE devices. Product features a UTP RJ45
port, and an SFP port loaded with SFP-MF855. The optical port
is customizable with the use of a swappable SFP for single or
multimode applications. Converter is auto sensing between 10, 100
and 1000mbps bandwidths, and each unit includes an AC power
cord for internal power, and PSE controller to output power into CAT
twisted pair cable to power devices. The converter has Powered
Device (PD) reset capability, the breakdown of the ber link can
disablePSEpoweroutputontheUTPportfor≈2secondsforthe
powered device to reset.
Please notify your sales representative immediately if any of the
items are missing or damaged.
CABLES
DMSI recommends using high quality, low loss bend insensitive
berpatchcordswithmediaconvertersolutions.Bendinsensitive
berprovidesauserfriendlysolutionforFTTDapplications,andis
very forgiving if bent in tight spaces. Recommend LC duplex to LC
duplex part numbers are:
Multimode:
For use with 62.5µm OM1: 3131002F2N9xxxM
For use with 50µm OM2/3: 3131002G2A9xxxM
Single-mode:
For use with SM OS2: 3131002Y2Y9xxxM
Replace xxx with required length in meters (three digits).
1
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OVERVIEW
SPECIFICATIONS
TechnicalSpecications
Standard Protocol
IEEE 802.3q
IEEE 802.3z 1000Base-TX/FX standard
IEEE 802.3 af Interface
Operation Mode Full /Half duplex mode
Connectors
UTP: RJ-45
Fiber connector: SFP
AC-inlet connector
RJ-45 Interface e transmission media adopts CAT5 twisted-pair with maximum
length of 100 meter (330 feet).
Fiber Interface e SFP ber interface is a duplex mode type which includes a pair
of optical transceivers: TX and RX.
Power Supply Interface e AC power supply is connected to AC input jack of media
converter through the attached AC power cable.
Environmental
Parameters
Work Temperature 0°C~50°C (32 °F ~ 122°F)
Storage Temperature -40°C~70°C (-40 °F ~ 158°F)
Humidity 5%~90% non-condensing
TP Cable Cat 5e, 6, 6A UTP or STP cable
Fiber Cable Multimode: 50/125, 62. 5/125, 100/140μm
Dimension 95mm(L) x 71.5mm(W) x25.4mm(H)
Warranty Lifetime
Mean Time
Between Failure 114,000 hours
TAA Compliant Ye s
2
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Connector type SFP
Fiber type Multimode
Wavelength 850nm
Max Distance 62.5µm: 224m
50µm: 550m
Min Tx PWR -11.0dBm
Max Tx PWR -6.0dBm
Sensitivity < -18dBm
Link Budget 7.0dBm
PACKING LIST
1 - 10/100/1000 PoE Media Conveter
1 - SFP-MF855
1 - QR Code Card (online access to PMF31855 manual)
1 - Power Supply
SAFETY PRECAUTION
Attention! If DC voltage is supplied by an external circuit, please
use a protection device on the power supply input.
OVERVIEW
SPECIFICATIONS
FiberTechnicalSpecications
3
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HARDWARE DESCRIPTION
FRONT PANEL
BACK PANEL
Power Supply Port
RJ-45 Port
LED Indicators
Duplex LC SFP
DIP Switch
4
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The larger top label on each converter, contains a serial number,
description, power information, and part number. The serial
number breakdown is provided by year, month, day, and a 4 digit
number.Serialnumberscan’trepeatastheyaretiedtospecic
dates.Thisformatcanbemodiedpercustomerrequirement.
HARDWARE DESCRIPTION
BOTTOM VIEW
Serial Number
20190306XXXX
Year Month Day Number MEDIA CONVERTER
Type: PoE 10/100/1000M 850nm SFP 1 *RJ45
Power: DC 52V 1.25A
PN: PMF31855
20190306XXXX
DMSI : 20633
Bottom view of media converter
5
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LED Indicators
There are six LED on the front view of PoE Gigabit SFP Converter;
eachofthemhasitsownspecicmeaningasshowninthetable
below.
LED Indicator Lamp Status Explanation
Fx/Act On Lit when FX connection is good.
O Blinks when FX data is transmitting.
Tx Link/ Act On Lit when TP connection is good.
O Blinks when TP data is transmitting.
FDX On Lit when TP connection is good.
O Blinks when TP data is transmitting.
Power On Lit when power is coming up.
1000 On Transfer rate of electric interface is 1000Mbps.
PoE On Lit when PoE is working.
HARDWARE DESCRIPTION
6
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HARDWARE DESCRIPTION
DIP Switch
TheDIPswitchisusedtocongureoperationmodeforLLF(Link
Loss Forwarding) and operation mode for UTP/Fiber port. The
default value of DIP switch is OFF.
2) Jumbo Frame
1) Stand-by Mode
7
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HARDWARE DESCRIPTION
DIP Switch
Jumbo frames can raise the eciency of Ethernet and network
processing in hosts by reducing the overhead, as seen in the
followingexamplewithTCPoverIPv4.Theprocessingeciencyof
the hosts can increase by the ratio of the payloads (approximately
6timesimprovementinthisexample).Whetherthisissignicant
depends on how packets are processed in the host. Hosts that use a
TCPooadenginewillreceivelessbenetthanhoststhatprocess
frames with their CPU.
Frame Type MTU Layer 1 Overhead Layer 2 Overhead
Standard 1500 Preamble
8 byte
IPG
12 byte
Frame Header
14 byte
FCS
4 byte
Jumbo 9000 Preamble
8 byte
IPG
12 byte
Frame Header
14 byte
FCS
4 byte
Layer 3 Overhead Layer 4 Overhead Payload Size Tot al
Transmitted Eciency
IPv4 Header
20 byte
TCP Header
20 byte 1460 byte 1538 byte 94.93%
IPv4 Header
20 byte
TCP Header
20 byte 8960 byte 1938 byte 99.14%
8
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