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Phybridge – A Better Start for the Best Finish

How to build a separate LAN for your IP voice solution

The NVT Phybridge FLEX8 plug-and-play long reach PoE Switch is a versatile, high-powered, enterprise-class solution with 8 downlink ports delivering fast Ethernet (10/100Mbps full duplex, symmetrical) and PoE++ (50Wper port) over multi-pair UTP for up to 2,000ft (610m) – that’s 6Xs the distance of typical PoE switches. The FLEX8 switch has two 1Gb uplink ports for daisy chain deployments and comes standard with a 190W external power supply and a universal mounting kit for wall or rack mounting.

FLEX8 is designed to make the modernization to IP quick, easy and cost-effective by leveraging 1, 2 or 4 pair UTP infrastructure. FLEX8 is an enabler of Modern LAN principles and is IoTG certified. Benefits include:

  • Accelerating your return on investment by reducing infrastructure costs.
  • Collapsing planning and deployment time.
  • Eliminating infrastructure barriers, risks, disruption and costs.
  • Creating a robust IP platform that is easy to configure, deploy and manage.

Unlike other Ethernet switch technologies, the FLEX8 switch offers:

Speed, Reach and Power

The FLEX8 switch leverages new or existing 1, 2 or 4 pair UTP cable. It can operate in standard mode (without an adapter) up to 328ft (100m), and in long reach PoE mode (with an adapter) for extended reach to 2,000ft (610m). The FLEX8 switch auto detects data rate for maximum bandwidth and transmission distance. It is equipped with a mode toggle which can be positioned to force 10Mbps when necessary to establishing a link.

Cable TypeData RateReach
4-Pair CAT5E100Mbps2000ft / 610m
2-Pair CAT5E100Mbps
1,000ft (305m)
2,000ft (610m)
1-Pair CAT5E*100Mbps
1,000ft (305m)
2,000ft (610m)
* For single-pair deployments the FLEX-Link or FLEX4 Adapter needs to be locally powered


  • 8 port plug-and-play unmanaged switch delivering fast Ethernet and PoE++ (up to 50W) over multi-pair UTP with up to 2,000ft (610m) reach.
    • 8 x 10/100Mbps (symmetrical, fullduplex) downlink ports supporting up to 50W of power per port.
    • 2 x 1Gb uplink ports
  • Can support 1, 2 or 4 pair UTP cabling infrastructure
  • Can operate in standard mode (without a FLEX Adapter) and long reach PoE mode for extended reach to 2,000ft (610m)
  • Auto detects data rate for maximum bandwidth and transmission distance utilization
  • Mode toggle to force 10Mbps speed when necessary to establish a link.
  • LED indicators for operating status and cable diagnostics
  • Supports Multicast, Unicast and Broadcast
  • EN 50121-4 Standard for Railway/ Subway environments
  • Operating temperature from +14°F to 149°F (-10°C to +65°C)
  • Designed and manufactured in North America
  • 5-Year Warranty
  • Power consumption: 6W
  • IoTG certified

FLEX8 Technical Specifications

Part NumberNV-FLX-08
Dimensions7.09” x 4.53” x 1.45” (LxWxH) 18cm x 11.5cm x 3.68cm, (LxWxH)
Weight1.3 lbs (0.59 kgs)
Interface: Ethernet Uplink (Trunk IP)2 RJ45 ports: 10/100/1000 Base-T autosensing, independent speed selection, Ethernet IEEE 802.3, CAT5e copper cable
Interface: Downlink
(PoE and IP to Adapter)
8 x RJ45 Jacks
Speed: 10/100Mbs (full duplex)
Power Supply48-58VDC (55VDC, 190W power supply included)
Power Consumption6W
Power Injection (PoE)DC voltage: 48VDC to 58VDC
IEEE 802.3af/at
If power is provided on all 4-pairs then maximum 50W; If power is provided on 2-pairs then maximum 30W
Operating Temperature+14°F to +149°F (-10°C to +65°C)
Tests conducted against international safety standard at maximum ambient temperatures of +104°F (40°C)
Humidity10% to 95% (non-condensing) at +95°F (+35°C)
NV-FLXLKThe FLEX Link adapter is an Ethernet extender that extends Ethernet and power over 2 or 4 pair UTP. It is used with the FLEX 24 Port switch and FLEX 8 Port switch to support long reach requirements. The FLEX Link can be locally powered to provide higher power to the end point.
NV-FLXLK-C• Adapter for FLEX24, FLEX8 and FLEX-Base to extend PoE up to 2,000ft (610m)
• Supports IEEE-compliant devices
• Delivers up to 30W of power
NV-FLX-04• Adapter for FLEX24, FLEX8 and FLEX-Base to extend PoE up to 2,000ft (610m)
• Supports IEEE-compliant devices
• Enables 4 IP devices from a single 2- or 4-pair UTP cable run
• Delivers 50W of power from the FLEX24 or FLEX-Base to the Adapter
• Can be locally powered for more power
NV-PS55-190W55VDC 3.5A (190 Watts) power supply for the FLEX8 switch.
NV-PS55-190W-DC55VDC 3.5 (190 Watts) power supply for the FLEX8 switch to be used in Railway and Subway applications.

PoE Power Available to FLEX-Link, FLEX4 and FLEX-C

FLEX-LINK/FLEX420FT (6M)250FT (76M)500FT (152M)750FT (228M)1000FT (305M)1250 (381M)1500FT (457M)1750FT (533M)2000FT (610M)
4 Pair UTP/STP50W47W44W41W38W35W32W30W27W
2 Pair UTP/STP30W30W27W25W22W20W17W14W12W
The FLEX-Link can support up to 50W of power using all 4-pairs or maximum of 30W using 2-pairs. FLEX4 can accept up to 120W of power and it can output up to 30W of power for 802.3af/at compliant devices. To account for cable losses and increase PoE delivery, the FLEX-Link/FLEX4 adapters have the option of using a local external power supply. The FLEX-Link/FLEX4 are IEEE-compliant and will negotiate power with the IP device.
FLEX-C20FT (6M)250FT (76M)500FT (152M)750FT (228M)1000FT (305M)1250 (381M)1500FT (457M)1750FT (533M)2000FT (610M)
4 Pair UTP/STP30W30W30W29W27W26W25W23W22W
2 Pair UTP/STP30W30W27W25W22W20W17W14W12W
The FLEX-C supports IEEE-compliant devices and can support up to 30W of power. If additional power is required use FLEX-Link instead.