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Kramer 676T

1:1 4K60 4:4:4 HDMI 2.0 and RS-232 Transmitter over Ultra-Reach MM/SM Fibre Optic

Max. 3km {MM}, 30km {sm}, Max. bandwidth 18Gbps

£749 (£898.80 inc. VAT)
Availability: In stock

Kramer 676T (50-067690)

The Kramer 676T is a high-performance HDMI fibre transmitter for ultra-reach extension of 4K@60Hz (4:4:4) HDMI signals. 676T converts the HDMI and RS-232 input signal to an optical signal that is transmitted over a fibre optic cable to a compatible receiver that converts it back to HDMI and RS-232 signals. 676T includes a multi-mode SFP+ transceiver, but can be used with any Kramer certified SFP+ transceiver, such as a single-mode SFP+ transceiver.

See also: Kramer 676R.
  • High Performance Standard Fibre Extender — HDMI fibre transmitter for providing ultra–reach signals over either multi–mode or single–mode optical fibre infrastructures, using Kramer pluggable OSP SFP+ units (multi–mode SFP+ included). Near–zero latency video chroma sub–sampling conversion technology, is employed to auto–adapt above 10G HDMI signals to 10G optical link signal data–rate.
  • Note: To ensure specified performance, support, and warranty of this product, use only Kramer's certified hi–performance OSP SFP+ pluggable optical units.
  • Multi–drop Signal Distribution — Use optical splitters to extend the input signals from a single transmitter to multiple receivers, for displaying the same content on multiple display devices using optical splitting only, with no need for AV distribution amplifiers.
  • HDMI Signal Extension — HDCP 2.2 compliant and supports up to 18G (6G per channel) data rate, LPCM 7.1, Dolby True HD, and DTS–HD as specified in HDMI 2.0.
  • Power Saving — With CEC ON/OFF function, shut down a display device automatically when not in use, and auto power it ON upon presentation start.
  • I–EDIDPro™ Kramer Intelligent EDID Processing™ — Intelligent EDID handling, processing and pass–through algorithm that ensures Plug and Play operation for HDMI source and display systems.
  • Bidirectional RS–232 Extension — Serial interface data flows in both directions, to enable data transmission and control of devices.
  • Cost–Effective Maintenance — Status LED indicators for power, source, sink and fibre link connections detection facilitate easy local troubleshooting.
  • Easy Installation — DigiTOOLS® rack mountable fan–less enclosure enables side–by–side mounting of 3 units in a 1U rack space with the recommended rack adapter.
  • 7 year warranty (Click Here for details)
  • Use RK-3T-B for installaion in rack systems.
4K 4096*2160 and 3840*2160 Resolution
HDMI 2.0
RS-232 Pass Through
Max 18 Gbps Bandwidth

Kramer 676T Specifications


Inputs 1 × HDMI: On a female HDMI connector
Outputs 1 × Fibre Optic: On LC connector(s)
Ports 1 × RS-232: On a 3–pin terminal block connector
1 × USB: On a female micro USB connector for firmware upgrade

Video Specifications

Max Bandwidth 18Gbps
Max Resolution 4096x2160@60Hz 4K@60 (4:4:4)
Compliance HDMI 2.0 and HDCP 2.2

Extension Line

Optical Fibre Multi–mode (MM) or single–mode (SM)
Optical Module Kramer 10Gbps SFP+ IEEE 802.3ae compliant modules (MM is included)

Multi-mode Line

Compliance G.651.1 OFNR fibre
Max Reach over OM3 MM Fibre 3km (1.8 miles)

Single-mode Line

Compliance G.652D OFNR fibre
Max Reach over OS1 SM Fibre 33km (20.5 miles)

Extended RS-232

Baud Rate 300 to 115200

User Interface

Indicators Source detection, sink detection, optical link and power LEDs
Controls Reset button


Power Source 12V DC, 2A
Consumption 480mA
Enclosure Size Tool
Type: Aluminium
Cooling: Convection ventilation
Accessories Included MM SFP+ transceiver, power adapter, power cord, mounting bracket set
Product Dimensions 12.00cm × 7.15cm × 2.44cm (4.72" × 2.81" × 0.96" ) W, D, H
Product Weight 0.2kg (0.5lbs) approx.
Shipping Dimensions 15.70cm × 12.00cm × 8.70cm (6.18" × .72" × 3.43" ) W, D, H
Shipping Weight 0.7kg (1.6lbs) approx.

Regulations and Environmental Conditions

Operating Temperature 0° to +40°C (32° to 104°F)
Storage Temperature –40° to +70°C (–40° to 158°F)
Humidity 10% to 90%, RHL non–condensing
Safety CE, UL
Environmental RoHs, WEEE

Replacement Power Supplies

ProductDescriptionPriceInc. VAT
Kramer PS-1202 12V/5A Desktop Power Supply with 75cm power cord £29 £34.80
Kramer PS-1202-O 12V DC/2A Open Head Power Supply £29 £34.80
Kramer PS-1205 Desktop Power Supply 12V/5A £37 £44.40
Kramer VA-102P12 10-Output 12v DC Power Supply MAX 10A - 1 Amp per channel £314 £376.80

Kramer 676T Compatible Products

Product CodeDescriptionPriceInc. VAT
Kramer RK-3T-B Rack Adapter 3 × Tools new shape and black colour £44 £52.80

Kramer 676T Optional Cables

DescriptionLengthPriceInc. VAT
Kramer CLS-2LC/OM3-33 2 LC Multimode LSHF fibre optic cable 10.0m £51 £61.20
Kramer CLS-2LC/OM3-66 2 LC Multimode LSHF fibre optic cable 20.0m £88 £105.60
Kramer CLS-2LC/OM3-98 2 LC Multimode LSHF fibre optic cable 30.0m £116 £139.20
Kramer CLS-2LC/OM3-164 2 LC Multimode LSHF fibre optic cable 50.0m £184 £220.80
Kramer CLS-2LC/OM3-246 2 LC Multimode LSHF fibre optic cable 75.0m £284 £340.80
Kramer CLS-2LC/OM3-328 2 LC Multimode LSHF fibre optic cable 100.0m £388 £465.60
Kramer CLS-2LC/OM3-558 2 LC Multimode LSHF fibre optic cable 170.0m £624 £748.80
Kramer CLS-2LC/OM3-656 2 LC Multimode LSHF fibre optic cable 200.0m £738 £885.60
More Cables for the Kramer 676T

Kramer 676T Possible Alternatives

Product CodeDescriptionPriceInc. VAT
Kramer 675R/T 1:1 4K60 4:4:4 HDMI 2.0 over fibre optic Extender Kit Max. 3km {MM}, 30km {SM}; Max. Bandwidth 18Mbps £1222 £1466.40
Kramer 676R 1:1 4K60 4:4:4 HDMI 2.0 and RS-232 Receiver over Ultra-Reach MM/SM Fibre Optic Max. 3km {MM}, 30km {sm}, Max. bandwidth 18Gbps £749 £898.80