The first thing you need to know about Rollover Cable is what it DOESN’T do. It does not create an electronically continuous connection between the two ends of a phone call, for instance. Phone calls are digitized and broken into packets that traverse the network separately, and when they reach their destination they are reorganized back into a complete conversation again by a device called the Media Gateway (MG). The MG needs to be configured correctly so that it always knows how to put the packets back together again. 

If it can’t figure out packet order because too many or too few have arrived at once, then your call will time out and disconnect or result in an error message. This is what’s known as “packet loss. A rollover cable reverses all of the wires without regard to how they are paired. It just repairs the ends in the order of transmission, as if the end of each wire were captured again by an MG. This is why it’s a bad idea to use a rollover cable with phone lines that carry data. It will cause packets to be lost at random, which can cause jitter and other problems in your system that were never there before.

What You Know About Rollover Cable And What You Don’t Know About Rollover Cable :

1. It’s just a bunch of wires.

The first thing you need to know about Rollover Cable is what it DOESN’T do. It does not create an electronically continuous connection between the two ends of a phone call, for instance. Phone calls are digitized and broken into packets that traverse the network separately, and when they reach their destination they are reorganized back into a complete conversation again by a device called the Media Gateway (MG). 

The MG needs to be configured correctly so that it always knows how to put the packets back together again. If it can’t figure out packet order because too many or too few have arrived at once, then your call will time out and disconnect or result in an error message. This is what’s known as “packet loss.

2. A rollover cable reverses all of the wires without regard to how they are paired.

It just repairs the ends in the order of transmission, as if the end of each wire were captured again by an MG. This is why it’s a bad idea to use a rollover cable with phone lines that carry data. It will cause packets to be lost at random, which can cause jitter and other problems in your system that were never there before.

3. It’s one or the other, not both.

A rollover cable doesn’t change anything on the inside of your phone, so you can’t have it and also have Caller ID lines. The most common cause of businesses installing rollover cables is to avoid having their main phone line numbers show up on caller ID calls coming into their company. The number must be sent over the line in a separate stream below the data in order for Caller ID to work properly, so if you’re sending your number over one wire it won’t be there for caller ID/line identification unless you’ve got two lines and run two wires to each device where you want line information (when you want it).

4. It’s primarily used to terminate a phone line.

The cable is nothing more than a connector thingamajig designed to make it easy to terminate one phone line and connect another, but that is not the primary function of a rollover cable. The primary function is for data transmission, and it can be used for that purpose with or without the RJ45 connector on the end of it. There are quite a few other kinds of connectors you can use instead though, if you prefer the look or feel of them over RJ45.

5. Rollover cables are often used with fiber optic cables.

They are not, and this is one of the most common myths circulating around the Internet. A fiber optic cable has optical fibers in it that carry light pulses of information, just like an ordinary telephone line except it uses glass instead of copper wire (there’s nothing magical about fiber optics). The light pulses travel in bundles of bundles, so you can have either a 2 or 4 pair cable installed without worrying about their functions because they’re just wires that carry digital data. You could run a four pair cable between two devices using a RJ45 connector instead if you wanted to or needed to, if that’s what you were planning on doing anyway. That’s a whole different level of detail you need to know about if you’re going to install a fiber optic cable, though.

6. Rollover cables are often used with CATV, and that’s the same as fiber optic cable.

It’s not, and this is another commonly held myth on the Internet that is also not true. You can’t use a rollover cable for CATV applications because it doesn’t work with data; it works only with voice or video transmission (which might be something like television).

LEAVE A REPLY

Please enter your comment!
Please enter your name here