Thursday, September 28, 2017

Power Supply: POE Switch for IP Camera

PoE switch, as the previous article describes, provides power and data to all PoE devices, including IP cameras, NVR recorders, computers, and VoIP phones, etc, via a single Ethernet cable (Cat5, Cat5e or Cat6). A PoE switch normally comes with multiply ports to support more than one IP camera. There are two types of PoE standards, one is IEEE802.3at, the other is IEEE802.3af. The major difference between them is that PoE+ standard (IEEE802.3at) can pump out up to 30 W per port, whereas PoE standard (IEEE802.3af) can provide up to 15.4 W per port. The question is how to choose or select a best PoE switch for your IP cameras in the perspectives of power supply.
Understand IP Camera Power Needs
The power consumption of PoE IP cameras varies owing to different types e.g. pan-tilt zoom (PTZ) cameras, Dome IP cameras, CCTV cameras, IP cameras with IR illumination night vision, etc. PTZ camera could draw up to 20 Watts, while other IP camera could consumes as little as 3 or 4 Watts. Therefore, a PoE switch should be able to provide enough power for different types of IP camera via Cat 5 or Cat 6 cables.
IP surveillance camera
Although Security cameras, either CCTV cameras or PoE IP security cameras, are not energy-consuming as other gadgets like computers or TVs; they only need a very little electricity to work, you still need to count it in. Remember to double check your PoE IP camera power consumption ether in the user manual or technical specification spreadsheet.
To provide the proper amount of power for PoE IP cameras, another important feature to look for in a PoE switch for IP cameras is its abilities to automatically adjust voltage accordingly. Many security cameras run either 12V or 24V power, if not supplied with the proper power voltage, the IP camera either won’t work or even be overloaded.
Maximal Power Supply of PoE Switch
Besides the power consumption of IP cameras, the maximal power supplies of your PoE switch matters as well.
If the maximal power supply of all your cameras exceeds your PoE switch power cap, then the PoE switch won’t provide enough power for your PoE IP cameras, pan-tilt-zoom (PTZ) IP cameras in particular. Insufficient power supply to the IP cameras are the common culprits for video loss and IP camera poor performance.
POE Switch for IP Camera
That being said, when buying a PoE switch for IP cameras, it’s important to go for a PoE switch with more power juice or reducing the number of PTZ IP cameras plugged into the PoE switch as PTZ cameras draw more power than other IP cameras.
Can Cat5 Ethernet Cables Cover PoE Transmission Range?
The transmission range of PoE network is 100 meters. PoE IEEE802.3af standard requires powered sourcing equipment (PSE) output power is 15.4W, after 100 meters transmission, the powered devices (PD) can receive 12.95W power. According to 802.3af standard current value-350ma to calculate, the resistance value of 100 meters Ethernet cable should be (15.4-12.95W)/350ma = 7 Ohm or (15.5-12.95)/350ma = 7.29 Ohm.
Obviously, Cat5 Ethernet cable can meet the requirement, but nowadays customers tend to use Ethernet cable Cat5e.
PoE switch is not only the device that provides data connection and electric power to IP cameras, but other PoE devices such as wireless access points, VOIP phones, and NVR recorders. Therefore, when choosing PoE switches, you should count all the devices that you meed to connect with. As a professional telecom supplier, our products including IP cameras, PoE switches and Cat5 cables, are thoroughly tested for use with video surveillance equipment. If you have questions about which PoE power supply is recommended for your security application, please contact us directly.

Monday, September 18, 2017

Optical Transceivers for Cisco 300 Series SMB Switch

Cloud is the hot issue, and its fast adoption rate is mostly happening in larger organization. To make every money count in small business network, Cisco and other telecommunication vendors release small and medium-sized business (SMB) switches to stay ahead in a competitive marketplace. Cisco 300 series SMB switch is the fixed-configuration Ethernet switch, which features high-performance, easy-to-setup and energy efficiency. Are you ready to learn more about it? Do you know how to choose fiber optics for Cisco SMB switches?
Networking News for SMB Switch
According to analysis, in the last five years, SMB cloud adoption nationwide has gone through the roof due to the need for scalability and deployment. However, 60% of hacked SMBs go out of business after six months due to the security issue. Furthermore, 70% of the SMB haven’t deployed mobile management solutions for phones and other devices, which makes it even better if you can get ahead of the game. Cisco small business switches, featured with increased revenue, excellent efficiency and strengthened security, provide a better way to do IT. Figure 1 shows 28 Ports 10G SMB Switch.
S3700-24T4S SMB switches
Cisco 300 SMB Ethernet Switch—Powerful and Affordable
The Cisco 300 Series switches is part of Cisco Small and Medium-sized Business line of network solutions. These switches offer the perfect combination of affordable and advanced networking for small businesses, and help you create a more efficient, better connected workforce. Cisco 300 series are available with 8 to 48 ports of Fast Ethernet and 10 to 52 ports of Gigabit Ethernet connectivity, providing optimal flexibility to create exactly the right network foundation for your business.
Choose the Cisco Small Business Switches for:
  • Strong security: a high level of security and give you finegrained control to safeguard your network from unauthorized users.
  • Power over Ethernet: with up to 48 PoE ports of Fast Ethernet or Gigabit Ethernet connectivity.
  • Support: with Cisco Small Business Support Service.
  • Advanced management options: with Web-based and command-line interfaces.
  • Performance: through VLAN scalability and a non-blocking switch fabric.
  • Intelligence: with security and quality of service.
  • Fan-less for quiet operation.
Models in Cisco 300 Small Business Switch:
Cisco SF 300-08, SF 302-08, SF 302-08MP, SF 302-08P, SG 300-10, SG 300-10MP, SG 300-10P, SG 300-20, SF 300-24, SF 300-24P, SG 300-28, SG 300-28P, SF 300-48, SF 300-48P, or SG 300-52 Managed Switch. Take Cisco SG 300-10 gigabit switch as an example, it is the fixed configuration managed switch with 2 Gigabit Combo Ports (RJ45+SFP).
FS Ethernet Switches
You can buy Cisco SG 300-10SFP 8-Port Gigabit SFP Switch with $457.67 in cozlink, or FS S3700-24T4S (24*10/100/1000Base-T Ports+4*10G SFP+) SMB Ethernet Switch at $289.
Unmanaged SMB Switch—Is It the Choice for Small Business Network?
Cisco Small Business Unmanaged Switch is the most cost effective scenarios that require only basic layer 2 switching and connectivity. As such, they fit best when you need a few extra ports on your desk, in a lab, in a conference room, or even at home. With unmanaged switches installed in your network, you can even get capabilities such as cable diagnostics, prioritization of traffic using default QoS settings, Energy savings capabilities using EEE (Energy Efficient Ethernet) and even PoE (Power Over Ethernet).
However, as the name implies, these switches generally cannot be modified/managed. You simply plug them in and they require no configuration at all. Therefore, Many customers prefer to use managed switches.
Cisco Transceiver Module for Compatibility Information
Supported SFP modules are listed below:
Cisco SFP modules
Based on the SFP (optical module form factor) Gigabit Ethernet standards, Besides the above Cisco SFP optics, 1000BASE-T, 1000BASE-SX, 1000Base-LX/LH, 1000BASE-ZX, 1000BASE-BX-D, 1000BASE-BX-U, 1000BASE-EX can be also used with Cisco small business 300 Series SMB switch.
The Cisco 300 series SMB Switches have been tested to deliver high availability and performance. This solution provides powerful and affordable services, e.g. speed up file transfer times, improve slow, sluggish network, keep business applications available and prevent costly downtime. These Ethernet switches support a huge number of Gigabit Ethernet SFP optical transceivers. You can find all the compatible ones at FS.COM. Besides SMB switches, we also offer 40G/100G data center switches with professional tech support.