2012年2月16日星期四

What is Cisco Chassis, Backplane, and Line Card?

Chassis, You Know Here:
A Chassis is a frame/housing for mounting the circuit components for refurbished cisco equipment Switches and Routers or any type of devices that provides power and a high-speed backplane. The frame also protects all of the vital internal equipment from dust, moisture, and tampering.

Making the Chassis to define even easier is;
A chassis is an enclosure; a container that holds things together... i.e. an egg carton holds eggs together inside. A chassis does the same thing; it holds the important things inside like wiring, power supplies etc.


General info of Backplane
Backplane is a circuit board with sockets that allows Supervisor engines Cards or modules to be inserted into these sockets and connect them to each other. Backplane is mounted on the Chassis.

Modules or line cards provide different types of interfaces, but the processing of packets is usually done in the Supervisor engine. cisco refurbished Backplane is the medium for data flow between modules and Supervisor engines.

Additionally, most high-end switches off-load processing away from the supervisors, allowing line cards to switch traffic directly between ports on the same card without using any processing power or even touching the backplane. Naturally, this can't be done for all traffic, but basic layer-2 switching can usually be handled exclusively by the line card, and in many cases also more complex operations can be handled as well.

What is Line Card?
The line cards provide interfaces to the network.


A line card can terminate a line supporting voice POTS service, ISDN service, DSL service, or proprietary ones. Some line cards are capable of terminating more than one type of service.
Since an access buy network hardware element is usually intended to interface many users (typically a few thousands) some exchanges have multiple line terminations per card. Similarly, it is common to have many line cards in the same network element.

A line card or Digital Line Card is a modular electronic circuit on a printed circuit board, the electronic circuits on the card interfacing the telecommunication lines coming from the subscribers (such as copper wire or optical fibers) to the rest of the telecommunications access network.

A line card commonly interfaces the twisted pair cable of a POTS local loop to the public switched telephone network (PSTN). Telephone line cards used in PSTN perform multiple tasks such as analog-to-digital and digital-to-analog conversion of voice, off-hook detection, ring supervision, line integrity tests, and other BORSCHT functions. In some telephone exchange designs the line used cisco cards generate ringing current and decode DTMF signals. The line card in a Subscriber Loop Carrier is commonly called a Subscriber Line Interface Card (SLIC).

2012年2月10日星期五

Cisco ASA 5500 Series, Best Guard for Business’ Security


AS hacker or virus attack spreading faster and faster, the network safety faced into a serious situation. You knowthis problem may bring some very terrible consequences such as destroying the operation of business, revealing very important or core information. What should we deal with these? The answer is to select a Cisco Firewall Security, for example, Cisco ASA 5500 series, especially asa5505 50 bun k9, which can help businesses increase effectiveness and efficiency in protecting their networks and applications while delivering exceptional investment protection throughmarket-proven security capabilities, extensible integrated services architecture, reduced deployment and operations costs and comprehensive management interfaces.

The Cisco ASA 5500 Series includes the Cisco ASA 5505, 5510, asa 5520 csc10 k9, 5540, 5550, 5580, and 5585-X Adaptive Security Appliances-purpose-built, high-performance security solutions that take advantage of Cisco's expertise in developing industry-leading, award-winning security and VPN solutions.

Through the Cisco MPF, the Cisco ASA 5500 Series brings a new level of security and policy control to applications and networks.

Let’s check one of Cisco ASA 5500 Series: Cisco ASA 5540-BUN-K9, better choice for your business’ network.
Product Details
Device Type
Security appliance
Enclosure Type
Rack-mountable - 1U
Dimensions (WxDxH)
44.5 cm x 33.5 cm x 4.4 cm
Weight
9.1 kg
RAM Installed ( Max )
1 GB
Flash Memory Installed (Max)
64 MB Flash
Data Link Protocol
Ethernet, Fast Ethernet, Gigabit Ethernet
Network / Transport Protocol
IPSec
Performance
Firewall throughput : 650 Mbps ¦ VPN throughput : 325 Mbps ¦ Connection rate : 25000 connections per second
Capacity
Concurrent sessions : 400000 ¦ IPSec VPN peers : 5000 ¦ SSL VPN peers : 2 ¦ Virtual interfaces (VLANs) : 200
Features
Firewall protection, VPN support, load balancing, VLAN support, High Availability
Power
AC 120/230 V ( 50/60 Hz )
The Cisco ASA 5540 Adaptive Security Appliance scales with businesses as their network security requirements grow, delivering exceptional investment protection and services scalability. The advanced network and application layer security services and anti-x defenses provided by the asa5520 csc10 k9 Adaptive Security Appliance can be extended by deploying a high performance Security Services Module. (more details you can see Cisco ASA 5500 Series at Cisco.com)

Purchasing info…
Manufacturer: Cisco
Part Code: ASA5540-BUN-K9
Features: Firewall protection, VPN support, load balancing, VLAN support, High Availability
Data Link Protocol: Ethernet, Fast Ethernet, Gigabit Ethernet
Device Type: Security appliance
Enclosure Type: Rack-mountable - 1U
List price:  US$16,995.00
Wholesale Price: US$7,648.00
You Save:  US$9,347.00 (55.00% OFF)
Tel: +852-3174-6166 (Hong Kong)
Fax: +852-3050-1066 (Hong Kong)
Email: cisco@router-switch.com (Sales Inquiries)/ webmaster@router-switch.com (Technical Inquiries)

Tips: Cisco embeds network firewall security throughout the network and integrates security services in all its products. cisco asa 5510 k9 As a result, network firewall security becomes a transparent, scalable, and manageable aspect of the business infrastructure.