6 votes
Accepted

Fiber to copper conversion, what are the odds?

Fiber media converter is a small device with two media-dependent interfaces and a power supply, simply receive data signals from one media, convert and transmit them to another media. It can be ...
Cow's user avatar
  • 1,732
5 votes
Accepted

Do 2.5Gb/s media converters exist?

If you are looking for an intermediate connection over fiber: there is no such fiber variant, so media converters for 2.5 Gbit/s don't exist. 2.5 and 5 Gbit/s are twisted pair only (and backplane, ...
Zac67's user avatar
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4 votes

Is the MAC address pool from which Bluetooth, Wi-Fi, GSM cards etc take their addresses from the same address pool as the ethernet MAC address pool?

Ethernet uses the "MAC-48" address space by IEEE. It is/was used for Wi-Fi, Bluetooth, Fibre Channel, SAS, ATM, Token Ring (and some others) as well. This gives us the opportunity to bridge all of ...
Zac67's user avatar
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3 votes
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Troubleshooting ethernet->fiber->ethernet with media converters

Don't bend fiber like that, it's sensitive. The black patch cable might be damaged, replace. Check the SFP modules - for gigabit over MMF you'll need 1000BASE-SX (850 nm). Verify SFP compatibility ...
Zac67's user avatar
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3 votes
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Get the raw binary stream from an optical fiber

The optical signal is a binary stream. I assume you mean to diagnose the equivalent electrical signal. SFP transceivers are ignorant to the actual L1 protocol in use. Their main job is to convert an ...
Zac67's user avatar
  • 84.4k
2 votes

Fiber to copper conversion, what are the odds?

"copper" is a rather vague term. it could refer to Twisted pair Ethernet, docsis (cable TV coax), various types of DSL, or various legacy telco technologies. But yes there are plenty of technologies ...
Peter Green's user avatar
  • 13.3k
2 votes

100Mbps embedded device on a GbE network.. can I use MII?

A phy converts the electrical signals from the internal medium independent form to an external medium dependent form. However it does not have any buffer, it cannot change speeds. Going from a slower ...
Peter Green's user avatar
  • 13.3k
2 votes

100Mbps embedded device on a GbE network.. can I use MII?

The MII is the interface between MAC and PHY - so you do need a PHY (PCS, PMA & PDM, with appropriate setup) to interface with anything. The Ethernet variants supported (100BASE-FX, 100BASE-TX, ...
Zac67's user avatar
  • 84.4k
2 votes
Accepted

Creating a distributed ethernet using a single mode fiber ring

Your requirements mandate: three ports at each location, requiring a switch either use two media converters per location (in & out) or a switch with two SFP ports you cannot use a spanning-tree ...
Zac67's user avatar
  • 84.4k
1 vote

Limit on how many times on converting fiber to copper vice versa

No, on a modern full duplex network there is no specific limit to this sort of thing (half duplex Ethernet did have limits on the number of repeaters between switches, but half duplex is a thing of ...
Peter Green's user avatar
  • 13.3k
1 vote
Accepted

Unstable network performance within the same facility

Connecting directly into the switch, use the wired network to see if the problem is still there. If not, it's the wireless network - interference, thick walls, long range, overload, ... If the problem ...
Zac67's user avatar
  • 84.4k
1 vote

Is the MAC address pool from which Bluetooth, Wi-Fi, GSM cards etc take their addresses from the same address pool as the ethernet MAC address pool?

Is the MAC address pool from which Bluetooth, Wi-Fi, GSM cards etc take their addresses from the same address pool as the ethernet MAC address pool? Yes. These are 48-bit addresses and the IEEE ...
YLearn's user avatar
  • 27.3k
1 vote
Accepted

What is your experience using 3rd-Party 10Gig Media Converters with Cisco equipment?

So the obvious question is how much all that media converter stuff costs versus just buying a cheap 10G NIC with an SFP+ port and using fiber, twinax or AOC to achieve a sane and supportable result? ...
rnxrx's user avatar
  • 6,114
1 vote

What is your experience using 3rd-Party 10Gig Media Converters with Cisco equipment?

Third party SFPs can be hit or miss. Make sure to check the compatibility matrix that cisco has. If the module is an unsupported module then it will not work right off the bat. There is a command ...
Zack Scaringello's user avatar

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