Question 1

How loud is this?

Accepted Answer

This will definitely depend on how dusty and hot where it is installed.  I have 2 of them, 1 installed in a mildly dusty and warm location - this one is VERY loud... 1 installed in a cool and low dust area and this one is as quite as the day I bought it....

Question 2

? this has fiber optic ready yes or no and if yes what cards do i need and part#

Accepted Answer

Yes it is ready for fiber optics.  No it does not come with the GBIC module with the base switch.  You need to look up the correct GBIC for the type of fiber optic cabling you have.
us dlink com - products - business-solutions - 52-port-gigabit-web-smart-switch-including-4-sfp-ports - the switch specs  But you need know your fiber optic mode e.g. SX- Multimode, etc.  This is based on the type of cable and the fiber optic module you have on the other end.  Remember you only have 4 fiber ports, not all 48.  Per the specs: 
Optional SFP Transceivers
• DGS-712       1000BASE-T Copper SFP Transceiver
• DEM-310GT   1000BASE-LX Single-mode SFP Transceiver up to 10 km
• DEM-311GT    1000BASE-SX Multimode SFP Transceiver up to 550 m

I have used these switches also with port aggregation to have increased bandwidth between the two switches.  
The switch is a great value for all you get.  I hope that helps...

Question 3

What types of ports does the D-Link 52-Port Gigabit Web Smart Switch include?

Accepted Answer

The switch includes 48 x RJ45 Gigabit Ethernet ports and 4 x Gigabit SFP ports.

Question 4

What are the dimensions and weight of the D-Link 52-Port Gigabit Web Smart Switch?

Accepted Answer

The dimensions of the switch are 1.73 inches in height, 17.32 inches in width, and 8.27 inches in depth, with an approximate weight of 5.69 lbs.

Question 5

What is the power supply voltage? Does it support 220V?

Accepted Answer

We use all 110V for all of my servers and peripherals.     If my memory serves me, I don't believe this unit is capable of handling that amount of voltage and surely wouldn't try to find out.    I can tell you that I'm very pleased with my purchase!!

Brand	D-Link
Series	DGS-1210
Model	DGS-1210-52

Format	Rack-mountable Desktop
Standards	IEEE 802.3 10BASE-T Ethernet IEEE 802.3u 100BASE-TX (Fast Ethernet) IEEE 802.3ab 1000BASE-T (Gigabit Ethernet) IEEE 802.3x Flow Control for Full-Duplex Mode
Network Management Type	Smart

Primary Ports	48 x RJ45 + 4 x SFP
Primary Port Speed	10/100/1000Base-T

MAC Address Table	16K
Uplink Speed	10/100/1000 Mbps

Buffer Memory	3.0 MB
Protocols	TCP/IP
PoE	No
Stackable	No
QoS	Yes
Layer	Layer 2 Only
Power	Maximum Power Consumption: 38.27W Standby Power Consumption: 29.44W / 110V, 29.49W / 240V

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D-Link 52-Port Gigabit Web Smart Switch including 4 SFP ports

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Dimensions & Weight
Dimensions	1.73" x 17.32" x 8.27"
Weight	5.69 lbs.

Item#: 9SIA6ZPKAR9014