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SMI-1110 Managed Media and Rate Converters

10/100/1000Base-T to 1000Base-X Conversion

10/100/1000 Managed Media Converter
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Perle’s advanced line of Managed Gigabit Rate Converting Media Converters, provides transparent and reliable 10/100/1000 ethernet to fiber connections. While providing an economical means of extending your existing copper based network connection, these media converters are SNMP manageable to enable complete control and status viewing of your fiber links.

Perle 10/100/1000 Managed Media Converters come standard with extensive cost and time saving features. In addition, a lifetime warranty and free worldwide technical support make Perle's Managed 10/100/1000 Ethernet Converters the smart choice for IT professionals.

SMI-1110 Managed Gigabit Rate Converting Media Converter Features

QOS ( Quality of Service )
  • Bandwidth Allocation via rate limiting
  • IEEE 802.1P tagged frame priority control
  • IEEE 802.1P priority tag remapping
  • IP TOS ( Type of Service ) priority for IPV4 Diffserv or IPV6 traffic class frames
  • Congestion Service Policy through WQF ( Weighted Fair Queuing ) or Strict Priority Queuing ( default )
VLAN Tagging
  • Default – Transparent to VLAN frames
  • Enable discarding of tagged frames
  • Enable discarding of untagged frames
  • Untag – Removes any existing tag
  • Insert Tag – Insert (if original frame is untagged) or replace (if original frame is tagged) the VLAN ID and priority with the configured default VLAN ID and priority tag.
  • Insert Double tag (Q in Q) – Append an additional tag using the configured default VLAN ID and priority.
Unknown Multicast Frame filtering When enabled, Multicast frames with an unknown destination address are not allowed to egress the port
Unknown Unicast Frame filtering When enabled, Unicast frames with an unknown destination address are not allowed to egress the port
Unidirectional Ethernet When enabled, provides the ability to restrict port to one-way traffic flow. Used in applications such as unidirectional video broadcasting as well as providing security for ethernet connections in accessible public areas.
Configuration Mode selection Select whether to use the on-board DIP switches or the management software for mode selection
Auto-MDIX Can manually set Auto or MDIX on the copper port via on-board strap or via the management software. Auto-MDIX (automatic medium-dependant interface crossover) detects the signaling on the copper ethernet interface to determine the type of cable connected (straight-through or crossover) and automatically configures the connection when enabled. The media converter can also correct for wires swapped within a pair. The media converter will adjust for up to 120ns of delay skew between the 1000Base-T pairs.
Converter Information
  • User configurable media converter converter name
  • User configurable fiber port name
  • User configurable copper port name
  • Copper Downshift status
  • Hardware revision number
  • Firmware version number
DIP switch settings View hardware DIP switch settings
Selectable Max Packet Size Set max packet size to 1522 / 2048 or 10,240 ( default )
10BaseT Extended Distance Normal/extended – default Normal. By configuring as “extended”, the 10baseT receiver sensitivity is increased providing the possibility of a 10BaseT connection greater than 100m.
Auto Copper downshift Automatically detects a 2-pair cable environment and downshifts operation of the link to 100 Mb/s. Configure the number of times ( 0-8 ) that the PHY will attempt to establish a successful Gigabit link before attempting to “downshift” as an auto-negotiating 10/100 device. Setting # of attempts to 0 ( default ) disables the feature.
Virtual Cable Test A test that enables the detection of potential copper cabling issues such as pair polarity pair swaps and excessive pair skew as well as any opens, shorts or any impedance mismatch. Will report the distance in the cable to the open or short.
Port Control Enable or disable individual fiber or copper port on the converter
Copper Port Status
  • Port Enabled (Yes/No)
  • Link Status (Up/Down)
  • Auto Negotiation Settings (Disabled, Complete or In Progress)
  • Resolved as crossover MDI or MDIX type
Fiber Port Status
  • Port Enabled (Yes/No)
  • Connector type (SC, LC, ST)
  • Link Status (Up/Down)
  • Far End Fault (OK, Failed)
  • Fiber Loopback mode (On/Off)
Control
  • Reset
  • Reset to factory default
  • Reset Statistical counters
  • Phy specific commands such write/read config, read dip switches
  • Update firmware
  • Fiber Loopback mode. (On/Off)
  • Virtual Cable Test. (On/Off)
  • Upload/download configuration
Detailed port statistics To assist in troubleshooting copper and fiber links, an extensive list of ingress and egress counters for both copper and fiber ports are available. These statistics can be viewed locally via the management module or from a central SNMP NMS on the network
Auto-Negotiation (802.3u) The media converter supports auto negotiation. The 1000Base-X fiber interface negotiates according to 802.3 clause 37. The 10/100/1000Base-T negotiates according to 802.3 clause 28 and 40. The 1000Base-X will link up with its partner after the highest common denominator (HCD) is reached and the copper has linked up with its partner. The 1000Base-X will continue to cycle through negotiation transmitting a remote fault of offline (provided this is enabled through the switch setting) until the copper is linked up and the HCDs match.

The media converter supports auto-negotiation of full duplex, half duplex, remote fault, full duplex pause, asymmetric pause and Auto MDI-X.
Smart Link Pass-Through When the Link Mode switch is placed into Smart Link Pass-Through mode, the copper ethernet port will reflect the state of the 1000Base-X media converter port. This feature can be used whether fiber auto-negotiation is enabled or disabled.
Fiber Fault Alert With Fiber Fault Alert the state of the 1000Base-X receiver is passed to the 1000Base-X transmitter. This provides fault notification to the partner device attached to the 1000Base-X interface of the media converter. If the 1000Base-X transmitter is off as a result of this fault it will be turned on periodically to allow the condition to clear should the partner device on the 1000Base-X be using a similar technique. This eliminates the possibility of lockouts that occur with some media converters. Applies only when fiber auto-negotiation is disabled.
Pause (IEEE 802.3xy) Pause signaling is an IEEE feature that temporarily suspends data transmission between two devices in the event that one of the devices becomes overwhelmed. The media converter supports pause negotiation on the 10/100/1000Base-T connection and 1000Base-X fiber connection.
Duplex Full and half duplex operation supported.
Jumbo Packets Transparent to jumbo packets up to 10KB.
Remote Loopback Capable of performing a loopback on the 1000Base-X fiber interface.

SMI-1110 Advanced Management Features

Enterprise and carrier-grade security is available through the support of strong authentication systems such as TACACS+, RADIUS and LDAP. Secure in-band access is assured via SNMPv3, SSH CLI and secure HTTPS Internet browser.

SNMP
  • Full read/write capabilities via central SNMP servers and PerleVIEW
  • Send SNMP traps ( up to 4 servers )
  • SNMPv3, V2C and V1
  • SNMPv3 – encryption and authentication for both management and trap support
  • RFC1213 MIB II
  • Proprietary MIB provided
Telnet / SSH CLI access In-band command line access via Telnet or SSH application
Internet Browser access
Console port CLI access Out-of-band command line access via Cisco compatible RJ45 serial console port using common “rolled” CAT5 cable.
Console port can be enabled ( default ) or disabled
Concurrent management sessions Run multiple management sessions simultaneously for multiple users
Inactivity timeout Protect secure management sessions by setting an inactivity timeout value
Alert event reporting Alert level events are stored in the local event log and sent as:
  • SNMP traps to up to 4 servers
  • SYSLOG messages to a SYSLOG server
  • Email to user defined email address
Advanced IP feature set
  • IPV4 and IPV6 address support
  • DHCP
  • DNS
  • Dynamic DNS
  • NTP
  • TFTP
  • Telnet
  • SSH V2 and V1
  • HTTP
  • HTTPS
Advanced Management User Authentication with primary and secondary server support
  • TACACS+
  • RADIUS
  • LDAP
  • Active Directory via LDAP
  • RSA Secure ID-agent or via RADIUS authentification
  • Kerberos
  • NIS
Advanced Management User Authorization and Accounting
  • TACACS+
  • RADIUS
Encryption
  • AES (256/192/128), 3DES, DES, Blowfish, CAST128, ARCFOUR(RC4), ARCTWO(RC2)
  • Hashing Algorithms: MD5, SHA-1, RIPEMD160, SHA1-96, and MD5-96
  • Key exchange: RSA, EDH-RSA, EDH-DSS, ADH
  • X.509 Certificate verification: RSA, DSA
Access Control List An access control list can be created which can filter out only those workstations that are authorized to access the management resources. Filter on IP and/or Ethernet MAC addresses
Network Services Filter Enable only those network services on the management module that are allowed on your network ( Telnet, SSH, HTTP, HTTPS, SNMP )
Firmware download Update the latest level firmware for management and media converter modules via TFTP or PerleVIEW

Hardware Specifications

Media Converter Module Indicators
Power / TST This green LED is turned on when power is applied to the media converter. Otherwise it is off. The LED will blink when in Loopback test mode.
Fiber link on / Receive activity (LKF) This green LED is operational only when power is applied. The LED is on when the 1000Base-X link is on and flashes with a 50% duty cycle when data is received.
Copper link on / Receive activity (LKC) This green LED is operational only when power is applied. The LED is on when the 10/100/1000Base-T link is on and flashes with a 50% duty cycle when data is received.
Fiber Duplex (FDF) This green LED is operational only when power is applied. The LED is on when the 10/100/1000Base-X link is operatinal in full duplex mode. The LED is off when in half duplex.
Copper Duplex (FDC) This green LED is operational only when power is applied. The LED is on when the 10/100/1000Base-T link is operatinal in full duplex mode. The LED is off when in half duplex.
10/100/1000 Speed This multi-color LED is operational only when power is applied. The LED is green when the speed of the copper ethernet port is running at 1000 Mbps. The LED is orange when the speed of the copper Ethernet port is running at 100 Mbps. The LED is off when in 10 Mbps.
Management Module Indicators / reset
Power Blinking green during startup cycle
Steady green: module has power and is ready
Red : error
ALM Red alarm indicator activated when an alert event occurs
LKC Green indicator indicating an active Ethernet link. Blinking indicates RX and TX of data
100/1000 Green - 1000 Mbps link
Yellow - 100 Mbps link
Off - 10 Mbps or no Link
Reset button Recessed pinhole button resets module
Connectors
10/100/1000Base-T RJ45 connector
2 pair CAT5, EIA/TIA 568A/B or better cable for 10/100.
4 pair CAT5 UTP cable for Gigabit.
Magnetic Isolation1.5kv
Management ethernet port 10/100/1000Base-T - RJ45
Auto- MDI/MDIX
Management console port RS232 Serial RJ45 - Cisco pinout for use with standard CAT5 "rolled cable" (crossover) 9600 to 115k bps 7/8 bits Odd,even, no parity 1/2 stop bits Hardware/software flow control DCD/DSR monitoring
Filtering
Filtering 1024 MAC Addresses
Frame Specifications
Buffer 1000 Kbits frame buffer memory
Size Maximum frame size of 10,240 bytes -- Gigabit
Maximum frame size of 2048 bytes -- Fast Ethernet
Switches - accessible through a side opening in the chassis
Auto-Negotiation (802.3u) Enabled (Default) - The media converter uses 802.3u Auto-negotiation on the 10/100/1000Base-T interface. It is set to advertise full duplex, half duplex, pause and remote fault capabilities.

Disabled - The media converter sets the port according to the position of the speed and duplex switches.
Link Mode Link Mode provides a transparency to the state of the copper link allowing for simplified trouble shooting from the devices connected to the media converter.

Normal (Default – Up)
With Fiber Auto Negotiation enabled when the copper link goes down the 1000Base-X link is brought down. The 1000Base-X link will advertise Remote Fault (Link Fault).

With Fiber Auto Negotiation disabled the state of the copper link has no effect on the 1000Base-X link.

Smart Link Pass Through (Down)
With Fiber Auto Negotiation enabled the behavior is as follows. When the copper link goes down the 1000Base-X link is brought down. The 1000Base-X link will advertise Remote Fault (Link Fault). When Remote Fault (Link Fault) is received on the 1000Base-X interface the copper transmitter will be turned off. When the copper receiver is off the 1000Base-X transmitter will be turned off. When the 1000Base-X receiver goes off the copper transmitter will be turned off.

With Fiber Auto-Negotiation disabled the behavior is as follows. When the copper receiver is off the 1000Base-X transmitter will be turned off. When the 1000Base-X receiver goes off the copper transmitter will be turned off.
Fiber Fault Alert The Fiber Fault Alert switch has meaning when Auto-Negotiation is disabled

Enabled (Default - Up)
When the 1000Base-X receiver is off the 1000Base-X transmitter is turned off. Periodically the 1000Base-X receiver will be turned on for a short period to allow the condition to clear if the 1000Base-X link partner is using a similar feature.

Disabled (Down)
Remote Loopback The media converter can perform a loopback on the 1000Base-X fiber interface.

Disabled (Default - Up)

Enabled - The 1000Base-X receiver is looped to the 1000Base-X transmitter. The copper transmitter is taken off the interface.
Auto-MDIX (Strap) If Auto-Negotiation (802.3u) is enabled, the media converter determines the current cable pinout to use on the copper interface. If Auto-Negotiation (802.3u) is disabled the Media converter will use the RX Energy method on the copper interface to set the port MDI or MDIX whichever is appropriate.

Enabled (Default) - Either a straight-through or crossover type cable can be used to connect the media converter to the device on the other end of the cable.

Disabled - If the partner device on the other end of the cable does not have the Auto-MDIX feature a specific cable, either a straight-through or crossover will be required to ensure that the media converter's transmitter and the partner devices transmitter are connected to the others receiver. The Media converter's 100Base-TX port is configured as MDI-X with this switch setting.
Speed Copper 100 (Default)
10
Duplex Copper Full (Default)
Half
Duplex Fiber Full (Default)
Half
Power
Input Supply Voltage (12 vDC Nominal)
Current 0.34amps at 12vdc
Power Consumption 4.1watts
Power Connector 5.5mm x 9.5mm x 2.1mm barrel socket
Power Adapter
Universal AC/DC adapter 100-240v AC, regulated DC adapter included
Environmental Specifications
Operating Temperature 0 C to 50 C (32 F to 122 F)
Storage Temperature minimum range of -25 C to 70 C (-13 F to 158 F)
Operating Humidity 5% to 90% non-condensing
Storage Humidity 5% to 95% non-condensing
Operating Altitude Up to 3,048 meters (10,000 feet)
Heat Output
(BTU/HR)		 14
MTBF (Hours) 238,087 without power adaptor
164,883 with power adaptor
Calculation model based on MIL-HDBK-217-FN2 @ 30 °C
Chassis Metal with an IP20 ingress protection rating
Mounting
Din Rail Kit Optional
Rack Mount Kit Optional
Product Weight and Dimensions
Weight 0.722 kg
Dimensions 175 x 145 x 23 mm
Packaging
Shipping Weight 1.2 kg
Shipping Dimensions 300 x 200 x 70 mm
Regulatory Approvals
Emissions FCC Part 15 Class A, EN55022 Class A
CISPR 22 Class A
CISPR 32:2015/EN 55032:2015 (Class A)
CISPR 24:2010/EN 55024:2010
EN61000-3-2
Immunity EN55024
Electrical Safety UL/EN/IEC 62368-1
CAN/CSA C22.2 No. 62368-1
UL 60950-1
IEC 60950-1(ed 2); am1, am2
EN 60950-1:2006+A11:2009+A1:2010+A12:2011+A2:2013
CE
Laser Safety EN 60825-1
Fiber optic transmitters on this device meet Class 1 Laser safety requirements per IEC-60825 FDA/CDRH standards and comply with 21CFR1040.10 and 21CFR1040.11.
Environmental Reach, RoHS and WEEE Compliant
Other ECCN: 5A992
HTSUS Number: 8517.62.0020
CCATS: G134373
Perle Limited Lifetime Warranty

Select a Model to obtain a Part Number - Managed Stand-alone Media Converters - 10/100/1000 to Fiber

Model
Connector
Type
Transmit
(dBm)
Receive
(dBm)
Power
Budget
(dBm)
Wavelength
(nm)
Fiber
Type
Core
Size
(um)
Modal
Bandwidth
(MHz* Km)
Operating
Distance
Min
Max
Min
Max
SMI-1110-M2SC05
Dual SC
1000Base-SX
-9.5
-4.0
-17.0
-3.0
7.5
850
MMF
62.5
160
220 m
(722 ft)
62.5
200
275 m
(902 ft)
50
400
500 m
(1,640 ft)
50
500
550 m
(1,804 ft)
50
2000
1000 m
(3281 ft)
SMI-1110-M2LC05
Dual LC
1000Base-SX
-9.5
-4.0
-17.0
-3.0
7.5
850
MMF
62.5
160
220 m
(722 ft)
62.5
200
275 m
(902 ft)
50
400
500 m
(1,640 ft)
50
500
550 m
(1,804 ft)
50
2000
1000 m
(3281 ft)
SMI-1110-M2ST05
Dual ST
1000Base-SX
-9.5
-3.0
-20.0
-3.0
10.5
1310
MMF
62.5
160
220 m
(722 ft)
62.5
200
275 m
(902 ft)
50
400
500 m
(1,640 ft)
50
500
550 m
(1,804 ft)
50
2000
1000 m
(3281 ft)
SMI-1110-M2SC2
Dual SC
1000Base-LX
-6.0
0.0
-17.0
-0.0
11
1310
MMF
62.5
160
2 km
(1.2 mi)
50
500
1000m
(3280ft)
SMI-1110-M2ST2
Dual ST
1000Base-LX
-6.0
0.0
-17.0
-0.0
11
1310
MMF
62.5
160
2 km
(1.2 mi)
50
500
1000m
(3280ft)
SMI-1110-M2LC2
Dual LC
1000Base-LX
-9.0
-1.0
-19.0
-1.0
10
1310
MMF
62.5
160
2 km
(1.2 mi)
50
500
1000m
(3280ft)
SMI-1110-S2SC10
Dual SC
1000Base-LX/LH
-9.5
-3.0
-20.0
-3.0
10.5
1310
MMF*
62.5
500
550 m
(1,804 ft)
50
400
550 m
(1,804 ft)
50
400
550 m
(1,804 ft)
SMF
**
-
10 km
(6.2 mi)
SMI-1110-S2LC10
Dual LC
1000Base-LX/LH
-9.5
-3.0
-20.0
-3.0
10.5
1310
MMF*
62.5
500
550 m
(1,804 ft)
50
400
550 m
(1,804 ft)
50
400
550 m
(1,804 ft)
SMF
**
-
10 km
(6.2 mi)
SMI-1110-S2ST10
Dual ST
1000Base-LX/LH
-9.5
-3.0
-20.0
-3.0
10.5
1310
MMF*
62.5
500
550 m
(1,804 ft)
50
400
550 m
(1,804 ft)
50
400
550 m
(1,804 ft)
SMF
**
-
10 km
(6.2 mi)
SMI-1110-S2SC40
Dual SC
1000Base-EX
-2.0
2.0
-23.0
-3.0
21.0
1310
SMF
**
-
40 km
(25 mi)
SMI-1110-S2LC40
Dual LC
1000Base-EX
-3.0
2.0
-23.0
-3.0
20.0
1310
SMF
**
-
40 km
(25 mi)
SMI-1110-S2ST40
Dual ST
1000Base-EX
-2.0
2.0
-23.0
-3.0
21.0
1310
SMF
**
-
40 km
(25 mi)
SMI-1110-S2SC70
Dual SC
1000Base-ZX
-2.0
5.0
-23.0
-3.0
21.0
1550
SMF
-
-
70 km
(43 mi)
SMI-1110-S2LC70
Dual LC
1000Base-ZX
0.0
5.0
-23.0
-3.0
23.0
1550
SMF
-
-
70 km
(43 mi)
SMI-1110-S2ST70
Dual ST
1000Base-ZX
-2.0
5.0
-23.0
-3.0
21.0
1550
SMF
-
-
70 km
(43 mi)
SMI-1110-S2SC120
Dual SC
1000Base-ZX
0.0
5.0
-32.0
-9
32.0
1550
SMF
-
-
120 km
(75 mi)
SMI-1110-S2LC120
Dual LC
1000Base-ZX
0.0
5.0
-32.0
-9
32.0
1550
SMF
-
-
120 km
(75 mi)
SMI-1110-S2ST120
Dual ST
1000Base-ZX
0.0
5.0
-32.0
-9
32.0
1550
SMF
-
-
120 km
(75 mi)
SMI-1110-S2SC160
Dual SC
1000Base-ZX
2.0
5.0
-34.0
-9
36.0
1550
SMF
-
-
160 km
(100 mi)
SMI-1110-S2LC160
Dual LC
1000Base-ZX
2.0
5.0
-34.0
-9
36.0
1550
SMF
-
-
160 km
(100 mi)
SMI-1110-S2ST160
Dual ST
1000Base-ZX
2.0
5.0
-34.0
-9
36.0
1550
SMF
-
-
160 km
(100 mi)

Single Fiber Models Recommended use in pairs

Model
Connector
Type
Transmit
(dBm)
Receive
(dBm)
Power
Budget
(dBm)
Wavelength
(nm)
Fiber
Type
Core
Size
(um)
Modal
Bandwidth
(MHz* Km)
Operating
Distance
Min
Max
Min
Max
SMI-1110-M1SC05U
Single SC
1000Base-BX-U
-10.0
-4.0
-17.0
-3.0
7.0
1310 / 1550
MMF
62.5
500
500 m
(1,640 ft)
50
500
500 m
(1,640 ft)
SMI-1110-M1SC05D
Single SC
1000Base-BX-D
-10.0
-4.0
-17.0
-3.0
7.0
1550 / 1310
MMF
62.5
500
500 m
(1,640 ft)
50
500
500 m
(1,640 ft)
SMI-1110-S1SC10U
Single SC
1000Base-BX-U
-9.0
-3.0
-20.0
-3.0
11.0
1310 / 1490
SMF
**
-
10 km
(6.2 mi)
SMI-1110-S1SC10D
Single SC
1000Base-BX-D
-9.0
-3.0
-20.0
-3.0
11.0
1490 / 1310
SMF
**
-
10 km
(6.2 mi)
SMI-1110-S1SC20U
Single SC
1000Base-BX-U
-8.0
-3.0
-22.0
-3.0
14.0
1310
SMF
**
-
20 km
(12.4 mi)
SMI-1110-S1SC20D
Single SC
1000Base-BX-D
-8.0
-3.0
-22.0
-3.0
14.0
1490
SMF
**
-
20 km
(12.4 mi)
SMI-1110-S1SC40U
Single SC
1000Base-BX-U
-3.0
2.0
-23.0
-3.0
20.0
1310
SMF
**
-
40 km
(25 mi)
SMI-1110-S1SC40D
Single SC
1000Base-BX-D
-3.0
2.0
-23.0
-3.0
20.0
1490
SMF
**
-
40 km
(25 mi)
SMI-1110-S1SC80U
Single SC
1000Base-BX-U
-2.0
3.0
-26.0
-3.0
24.0
1510
SMF
-
-
80 km
(50 mi)
SMI-1110-S1SC80D
Single SC
1000Base-BX-D
-2.0
3.0
-26.0
-3.0
24.0
1590
SMF
-
-
80 km
(50 mi)
SMI-1110-S1SC120U
Single SC
1000Base-BX-U
-3.0
2.0
-34.0
-9
31.0
1510
SMF
-
-
120 km
(75 mi)
SMI-1110-S1SC120D
Single SC
1000Base-BX-D
-3.0
2.0
-34.0
-9
31.0
1590
SMF
-
-
120 km
(75 mi)

The minimum fiber cable distance for all converters listed is 2 meters.

*A mode-conditioning adapter as specified by the IEEE standard, is required regardless of the span length. Note how the mode conditioning adapter for 62.5-um fibers has a different specification from the mode-conditioning adapter for 50-um fibers.

**ITU-T G.652 SMF as specified by the IEEE 802.3z standard.

Media Converter Accessories
4 DIN Rail Mount Bkt DIN Rail Mounting Kit
MCSM Standalone media converter wall mount bracket
Managed Ethernet to Fiber Links

Manage your copper to fiber link with a Managed Standalone Media Converter. Ideal for use in managed networks with low density fiber applications. A Managed Standalone Media Converter is connected across a fiber link to a remote media converter. The copper and fiber link on the managed standalone unit can provide vital information and status to network management tools such as SNMP.

Managed Ethernet to Fiber Links image
Bridge 10/100 Devices to gigabit Backbone

Connect 10/100 devices to Gigabit Backbone
Devices on a 10/100 ethernet switch can be connected to a Gigabit backbone through the use of rate converting 10/100/1000 Media Converters.

Bridge 10/100 Devices to gigabit Backbone Image
Single Mode / Single Fiber

Connect copper ports over a single fiber strand ( also referred to as “Bi-Directional” BiDi )
When Single Strand fiber is used, a pair of Single Fiber Media Converters is needed for the copper to fiber conversion. Perle Single Fiber Media Converters are also referred to as “Up/Down” models. For example the SMI-1110-S1SC10U (“Up”) and SMI-1110-S1SC10D (“Down”), shown below, must be used in pairs. An “Up” must be matched with a “Down” peer to deal with transmit and receive frequencies separately.

Single Mode Fiber DiagramSMI-1110-S1SC10USMI-1110-S1SC10D


The majority of installations for single mode fiber media converters are of the “dual connector” or “dual fiber” type where one fiber connection is used for transmit, the other for receive. These are physically “crossed” to match up the Transmit/Receive links.

However, to reduce costs, or where there are limits on available fiber, WDM technology may be utilized. WDM uses separate transmit and receive frequencies to communicate on a single fiber strand. WDM technology relies on the fact that optical fibers can carry many wavelengths of light simultaneously without interaction between each wavelength. Thus, a single fiber can carry many separate wavelength signals or channels simultaneously.

So remember, if Single Strand fiber is used, you will need an “Up” Media Converter on one side and a “Down” Media Converter on the other for copper to fiber conversion.

Perle offers a wide variety of Single Fiber (“Up/Down”) Media Converters to connect 10BaseT, Fast Ethernet and Gigabit to single fiber. Whether you need Managed or Unmanaged, Standalone or Modular Chassis Based, 20km or 120km, Perle has the right model to meet your fiber conversion requirement.