The first step would be to contact an ISP or two and get details from them about their process, technologoy etc.
MUX, short for Multiplexers, are devices that combine multiple signals/flows for long haul.
Organizations can get a link from ISP's in multiple different ways some of them are:
- T1's, DS3's, OC3's, MPLS etc just some different services and methods
It all depends on your needs/requirements. As rais mentioned first step would be to contact the ISP. If you are using a consultant then your consultant should handle that process. Not sure which area are you in but at times people go with the resellers too as they can get better deals for high level connectivity.
Service providers use this device to provide connectivity to the vendors. Service providers will place MUX at the place from where the site of the vendors are nearest or if a vendor is taking multiple connectivities they will spare this device at vendor location.
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"Everybody is genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is a stupid."
You have some good advice from other contributors. The most important in all of this is the type of connection you want and checking with a provider to see if they can provide it.
You wish to have a 100Mb Ethernet connection. Then you need to make sure the provider can deliver that. If not then you need to find another provider.
Some questions you need answered:
Type of media connection.
Does the current equipment I have accomodate the speed and media type desired.
If you desire multiple carriers or multiple connection types does it need to be redundant paths, different POP's, type of routing protocol, etc...
Before contacting any ISP, know what you want, have a list of requirements and present this info to the account team at the ISP.