Products

LEX3891-2QF

100GBASE-R to 100GBASE-R media converter

The LEX3891-2QF is an Ethernet OAM-compatible media converter equipped with Link OAM/CFM OAM functions.
It is the world's smallest*1 Ethernet OAM-compatible media converter.


    ● The world's smallest-class chassis
    ●Compliant with IEEE802.3ba/bm (100GBASE-R) standards
    ●Auto Laser Shutdown (shuts down Tx optical signal in case of fiber disconnection)
    ●Supports FEC (Forward Error Correction) functionality
    ●Supports Jumbo Frames
    ●Supports transparent transmission of BPDU, EAPOL, and LACP
    ●Settings can be changed using DIP switches (for standalone use)
LEX3891-2QF

View

LEX3891-2QF

  • LEX3881-2F

Spec

Models LEX3891-2QF
Standards IEEE802.3ba/bm(100GBase-R4)
Transmission speed 100Gbps
Fiber ports Number of SFP ports QSFP28 x 2 ports, SFF-8661Compliant
Transmission mode Switching mode
Maximum frame size 12,288 byte
MAC address 16,384
Communication function link fault pass through (Default: OFF) EAP/BPDU/LACP transparent.
FEC stands for Forward Error
Correction.
Flow Control IEEE802.3x (full duplex)
Latency 1.5μs
Rated input voltage/frequency AC90~240V、DC12V±5% 50/60Hz
Maximum heat output 3A
Maximum power consumption
(including 2 x QSFP)
32 W (when QSFP-100G-ZR4 and QSFP-100G-LR4 are installed on each port)
Maximum heat output
(including QSFP x2)
27.53kcal/h (when QSFP-100G-ZR4 and QSFP-100G-LR4 are installed on each port)
AC adapter dimensions Main unit 62 × 30 × 65mm
Cable length 1m
Jack Long 11.0mm
AC adapter weight 211g
Environmental conditions Operating
Temperature/Humidity
0℃ ~ 40℃ / 0% ~ 95%(no condensation)
Storage
Temperature/Humidity
-25℃ ~ 70℃ / 0% ~ 95% (no condensation)
Dimensions 55 × 110 ×40.5mm
without detachable parts
Weight (body only) 330g
Compliance standards EMI Standards EMI VCCI Class B, FCC Class B
Environmental Standards RoHS compliant (10 substances)
Safety standards PSE
Reliability MTBF: 189,832(h)
(at room temperature of 25℃ *excluding QSFP)
Accessories AC adapter x 1
Installation guide & warranty x 1
Cable tie to prevent adapter cord from coming loose x 1
Rubber feet x 1 set (4 pieces)
Magnet x 1
Magnet mounting screw x 1
PD board mounting bracket x 1
PD board mounting bracket body connection screws x 2
PD board mounting bracket connection screws x 2
L-shaped DC conversion plug x 1
name situation setting explanation
SW1 Up (OFF) Built-in ROM setting
priority mode
If you want to prioritize DIP when using it alone,
make sure to turn it ON.
Down (ON) DIP setting priority mode
SW2 Up Both ports LinkOAM enabled If disabled, in-band management will not be possible
(OAM frames will be transmitted when disabled).
Down LinkOAM disabled on both ports
SW3 Up - -
Down
SW4 Up LFP1 disabled SFP2 is shut off when SFP1 is disconnected
Down LFP1 enabled
SW5 Up LFP2 disabled SFP1 is shut off when SFP2 is disconnected
Down LFP2 enabled
SW6 Up - -
Down
SW7 Up Port 1 FEC disabled -
Down Port 1 FEC enabled
SW8 Up Port 2 FEC disabled -
Down Port 2 FEC enabled

Note 1) The following combinations cannot be used:
- 2 QSFP-100G-ZR4 installed at the same time
- 2 QSFP-100G-ER4 installed at the same time
- QSFP-100G-ZR4 and ER4 installed at the same time
Note 2) Cannot be installed in LEX3004
Note 3) When installing LEX3891-2QF in LEX3020, please install it with one slot left next to it
(Installation in 19-20 slots is possible).


■DIP Switch Specifications

name situation setting explanation
SW1 Up (OFF) Built-in ROM setting
priority mode
If you want to prioritize DIP when using it alone,
make sure to turn it ON.
Down (ON) DIP setting priority mode
SW2 Up Both ports LinkOAM enabled If disabled, in-band management will not be possible
(OAM frames will be transmitted when disabled).
Down LinkOAM disabled on both ports
SW3 Up - -
Down
SW4 Up LFP1 disabled SFP2 is shut off when SFP1 is disconnected
Down LFP1 enabled
SW5 Up LFP2 disabled SFP1 is shut off when SFP2 is disconnected
Down LFP2 enabled
SW6 Up - -
Down
SW7 Up Port 1 FEC disabled -
Down Port 1 FEC enabled
SW8 Up Port 2 FEC disabled -
Down Port 2 FEC enabled

■LED

LNK/SPD
(2 pieces)
optical port link
Status/speed information
display
- lights out Link not established
100GBASE-R link establishment
green lit 100GBASE-R link establishment
green blinking Communicating
Red Slow flashing (1 second cycle) Signal Detect
green/orange Slow flashing (1 second cycle) LFP is shutting off

■LED(At startup)

Start condition Startup LED color lighting pattern
name color
DIP priority mode LINK/SPD orange All LEDs on (about 15 seconds) →
2 LEDs off → Normal operation
PWR green always on
Built-in ROM
priority mode
LINK/SPD orange Two LEDs flash alternately (about 2 laps per second)
→ All LED lights on (about 15 seconds) → 2 LEDs off → Normal operation
PWR green always on

■LED(When updating firmware)

LED name lighting pattern
PWR Always green
LINK/SPD (right) Always green
LINK/SPD (left) Rotation lighting, repeating green → orange → red at a cycle of about 1 second

Page Top

Products
About FXC