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Simultaneous Connection and Powering for IP Surveillance Cameras


The Challenge

When a successful European toy manufacturer outgrew its facilities, it built a brand new campus that included the office, manufacturing and warehouse space. Since copper Ethernet cable has a range limitation of about 100 meters, multi-mode fiber was used to network the three new buildings. Multi-mode fiber provided the necessary range, immunity to Electromagnetic Interference (EMI), speeds of up to 40 GB/s and high security. (You can’t hack into a beam of light with your laptop.) As the facility received daily visits from toy sales representatives and other outsiders, security was an important consideration.
The toy manufacturer also wanted 24/7 videosurveillance for the campus. But, the outdoor IP cameras had 100Mbps copper interfaces and the campus network infrastructure used fiber. Additionally, most of the IP cameras would need to be installed in locations that were a long distance from any power outlets.
Standard copper to fiber media converters could convert the signals from the IP cameras, but they wouldn’t solve the power problem. And, because the cameras would be outdoors, the company needed equipment with extended temperature specifications and the ability to observe and report faults on remote copper and fiber connections.

The Solution

The manufacturer chose Advantech B+B PoE+ Giga-MiniMc with LFPT.  The compact converter includes two 10/100/1000 Mbps Power-over-Ethernet (PoE) copper ports and an SFP (Small Form Pluggable) fiber port. Along with an Ethernet connection, each of the Ethernet ports provides up to 25 W power to connected devices. That eliminated the need to run dedicated power lines out to the camera locations.
The SFP fiber ports support 100 Mbps or 1000 Mbps which future-proofs the installation. The factory only requires 100 Mbps connectivity to meet its current needs. But, if they later wish to upgrade the system to Gigabit, the PoE+ Giga-MiniMc with LFPT easily transitions from multi-mode to single-mode fiber. The hot-swappable SFP transceiver is the only component that would need to be changed.

The Features

The PoE+ Giga-MiniMc with LFPT Gigabit converter includes LEDs for copper ports that indicate link/activity and duplex transmission. The LEDs adjacent to the SFP fiber port indicate power, link, speed and fault. The terminal block on the back of the device supports DC power. An external AC adapter is also included with the product. The converter is built for extreme temperature ranges of 0 to 70° C. And, as an unmanaged device, the converter is easy to install.
There are three DIP Switches: one for LFPT (Link Fault Pass Through) on each copper port and one for PoE reset. LFPT is a troubleshooting feature that combines TX (copper) and FX (fiber) LinkLoss. In the ON position, the converter will pass a link fault through the device at each segment. Thus, if a link fails on one side of the media converter, the media converter will force the link (LED) down on its link partner. If the copper connection is lost, the converter will report the fault to the fiber port, which will extinguish as well. If a failure occurs on an interface, it will be reported all the way down the line to the far end and LEDs will be extinguished accordingly.
When the PoE Reset DIP Switch is ON, the converter will turn OFF the output power on the copper port if the LINK state is lost on the fiber segment. LFPT and PoE Reset diagnostic features are set to OFF by default, allowing the customer to choose which feature is important and for which port. The LFPT diagnostic features and the PoE reset option alert a network manager when faults occur and give the manager the ability to reset remote devices from the central office.

The Product

The PoE+ Giga-MiniMc’s PoE features meet 802.3af and 802.3at standards for running electrical power over existing Category5 (or higher) copper cabling, while concurrently supporting the Ethernet data stream. To prevent damage to connected equipment, the converter will only provide as much power as the equipment actually draws.

PoE+ Giga-MiniMc, 2TX/SFP Specifications:
  • Under 1U high
  • DIN rail mountable
  • Power options for AC or DC
  • Extended temperature operation (0 to +70°C) DC power
  • Accepts any MSA-compliant SFP
  • Diagnostic DSW for troubleshooting

The Benefits

  • Cost-effective and flexible with interchangeable SFP modules
  • Provides Power over Ethernet
  • Compact size
  • AC or DC power
  • Supports Ethernet copper, 10/100/1000 Mbps to 1000 Mbps Gigabit fiber or 100 Mbps fiber
  • SFP modules are hot-swappable
  • Diagnostic LEDs, including LFPT and PoE Reset