4-port 10/100Base-TX RJ-45 with auto MDI/MDI-X function for ISW-621T series • 2-port 100Base-FX interface on ISW-621T for up to 2km (multi-mode fiber 62.5/125μm, 50/125µm) transmission distance • 2-port 100Base-FX interface on ISW-621TS15 for up to 15km (single-mode fiber 9/125µm) transmission distance   Layer 2 Features • Complies with IEEE 802.3, IEEE 802.3u 10/100Base-TX, 100Base-FX Ethernet standard • Supports auto negotiation and 10/100Mbps half / full duplex mode for each copper port • High performance Store and Forward architecture • Prevents packet loss with back pressure (half-duplex) and IEEE 802.3x pause frame flow control (full-duplex) • Backplane (Switching Fabric): 1.2Gbps • Integrated address look-up engine, supporting 2K absolute MAC addresses • 1Mbit on-chip frame buffer • Automatic address learning and address aging • CSMA/CD Protocol   Industrial Case / Installation • IP30 metal case / protection • DIN rail and wall mount design • 12 to 48V DC, redundant power with polarity reverse protection and connective removable 　terminal block for master and slave power • Supports EFT protection 6KV DC for power line • Supports 6KV DC Ethernet ESD protection • -40 to 75 degrees C wide operating temperature   Highly Convenient and Feasible Industrial Robust Switch PLANET has upgraded two models named ISW-621T and ISW-621TS15 for use in environments with wide operating temperature. The capital ‘T’ (ISW-621T and ISW-621TS15) shown in the model names means that they can support and operate under WIDE-TEMPERATURE environment ranging from -40 up to 75 degrees C. As we know the temperature in many places and countries of the world are lower than -10 degrees C, these two new models, ISW-621T and ISW-621TS15, will be the right products for Transportation, Manufacturing, Security and Surveillance network deployments in those harsh environments. The ISW-621T / ISW-621TS15 also provides a high level of immunity against electromagnetic interference and heavy electrical surges which are usually found on plant floors or in curb side traffic control cabinets.   Flexibly Extendable Distance They(the ISW-621T and ISW-621TS15) each include four 10/100Base-TX auto-negotiation ports and two 100Base-FX ports. The ISW-621T is equipped with 100Base-FX multi-mode SC interfaces for transmission distance up to 2km while the ISW-621TS15 is equipped with 100Base-FX single-mode SC interfaces for transmission distance up to 15km. The two 100Base-FX ports provide more flexibility for Transportation, Manufacturing, Security and Surveillance with distance extension without any limitation, making the ISW-621T / ISW-621TS15 suitable either for long distance (ISW-621TS15) or short distance (ISW-621T) network deployment.   Easy Installation and Wide Range of Power Usages The ISW-621T and ISW-621TS15 are designed with a compact case that allows either DIN rail or panel mounting for the efficient usage of cabinet space. It provides an integrated power supply with a wide range of voltages for worldwide operation. It also offers dual-redundant, reversible polarity 12V DC to 48V DC power supply inputs for high availability applications requiring dual or backup power inputs.