Entries by hdd2006168@126.com

Comparision of Cisco ISR 4000 routers

Model Comparison of Cisco Router ISR 4000 Series Basic models : Technical Specifications ISR4461/K9 ISR4451-X/K9 ISR4431/K9 ISR4351/K9 ISR4331/K9 ISR4321/K9 ISR4221/K9 Aggregate Throughput 1.5Gbps 1 Gbps to 2 Gbps 500 Mbps to 1 Gbps 200 Mbps to 400 Mbps 100 Mbps to 300 Mbps 50 Mbps to 100 Mbps 35 Mbps to 75 Mbps Total onboard […]

How to choose between PoE, PoE+ and UPoE (POE++) switches ?

Differences between POE,  POE+ and UPOE (POE++) PoE, the abbreviation of ‘Power over Ethernet’,is a technology that delivers power and data safely over the same Ethernet cable for the local area networks (LANs).   After many years’ evolving,  it developed several types of PoE standards.  Nowadays in market you can see POE switch, POE+ and UPOE […]

Active POE vs. Passive PoE Switch

POE switch is designed to offer both network connection and power supply to one PoE powered device (PD) through one Ethernet cable. And as the demand for deploying PD devices such as IP phones, IP cameras and access points increases, PoE switch is commonly used in today’s enterprise and campus networks for it helps to […]

How to choose a right optical transceiver ?

  A fiber optical transceiver is a photonic and electronic device that transmits and receives data over optical fibers rather than electrical wire. It is also called as an optical module or fiber optic module. Choosing a right fiber optic transceiver for your use is very important. Today’s main local carriers are major efforts to develop residential campus network […]