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| ChrisDfer 2003-04-03, 6:51 pm |
| I am trying to increase my understanding of WAN on the physical side of everything. Ok I understand that from the DTE device to the modem or csu/dsu etc... that the physical connections use standards such as EIA/TIA-232 and EIA/TIA-612/613 but what about the connection from the CSU/DSU to the CO? What types of connections and standards are used there? Like when T-1 or T-3 etc... is referenced what type of physical connections are they? This has always been a area where things have been a bit fuzzy for me I have a feeling I am just making it more complicated then I should. | |
| yoyoyo123 2003-04-03, 7:32 pm |
| They are into the T1, T2, T3.
It very simple to know this the standard is no speed it bandwidth on the majority and that is how.
To know this more see my web page http://www.angelfire.com/fs/iqalccna/index.html
OK!!! | |
| ChrisDfer 2003-04-03, 10:24 pm |
| Wow thank you for that very instresting post. I was asking what exactly type of physical connection could I expect to be comming in from on a T-1 or T-3 line or what have you. | |
| Yankee 2003-04-04, 2:41 am |
| Go look at cisco HSSI, OC3 and t1 cards for the various routers to get an idea of what physical connections are needed. I think that will help you understand.
Yankee | |
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| ChrisDfer, you are funny and I like your lil dancing chic. Please find the time to post more threads in this forum. Oh, and remember..."IT IS VERY SIMPLE TO KNOW THIS..."
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| clarkv 2003-04-04, 10:38 am |
| That certainly was an interesting, not to mention very insightful post from yoyoyo123. If we only knew what yo was referring to..... Whatever it is, it should be very simple to know, so maybe I'm just an idiot. | |
| djmaplethorpe 2003-04-04, 11:09 am |
| quote:
Originally posted by ChrisDfer
I am trying to increase my understanding of WAN on the physical side of everything. Ok I understand that from the DTE device to the modem or csu/dsu etc... that the physical connections use standards such as EIA/TIA-232 and EIA/TIA-612/613 but what about the connection from the CSU/DSU to the CO? What types of connections and standards are used there? Like when T-1 or T-3 etc... is referenced what type of physical connections are they? This has always been a area where things have been a bit fuzzy for me I have a feeling I am just making it more complicated then I should.
I think looking at the Cisco website may be very helpful, but from what I've seen depending on where you are depends on what you get. I have seen demarcs that have been nothing more than cable/wires coming to a punchdown block, and also have seen an 45 ready to plug into. It has been a few years since I have done this, it seems to me the rj-45 were wired 1,2,7,and 8 and some were 1,2,4, and 5. Now there may be a differnce between how Frame Relay and T-1's come in, I'm almost sure there is. I think if your local Telco is anything like ours here, you can find a good tech they are more than willing to answer your questions. I'm sure given time some one here can answer your questions.
Good Luck | |
| ChrisDfer 2003-04-04, 2:55 pm |
| Well correct me if I am wrong but like wouldn't/couldn't the frame relay be riding on top of a T-1 line? From my understanding frame relay is just a protocol and not a actually physical medium. Much like ethernet compared Coax cable or UTP. I mean I seen all pictures of the CSU/DSU and what not whether built into special device or added to the router as a WIC. But I am more curious like what exactly is the T-1 line do they use HSSI? If I recall right HSSI has a pertty limited distance. Or do they use somthing completly different? I been told to look on the cisco site but I really don't know exactly where it is.
djmaplethorpe you from Walla walla? | |
| yoyoyo123 2003-04-04, 3:02 pm |
| NONO,
THE FRAME RELAY DOES NO RIDING. ETHERNET IS WHAT YOU ARE WANT. THE WAN NO CONSIST OF FRAMES BUT THE T1 IS NOT AS MUCH T2 OR T3. THIS WINDOW? | |
| ChrisDfer 2003-04-04, 4:22 pm |
| quote:
Originally posted by yoyoyo123
NO
NO, THE FRAME RELAY DOES NO RIDING. ETHERNET IS WHAT YOU ARE WANT. THE WAN NO CONSIST OF FRAMES BUT THE T1 IS NOT AS MUCH T2 OR T3. THIS WINDOW?
Heh shutup now and stop following me around you freak.
Ohhhh, don't think I am being rude to some forgein guy who is trying to help. I am being rude to some uhhhh hmmm guess he is forgien since he is canadian. But anyways he isnt trying to be nice he is a very odd 34yr man who owns like 80 cats and lives with his 45yr old uncle in one of those silver bullet trailors in a town called fox-crack.
Now enough.... | |
| yoyoyo123 2003-04-04, 6:28 pm |
| NO YOU WRONG YOU WRONG I KNOW ALL YOU NOTHING HEAD I ROUTER MASTER I HAVE MOUS ϊιυЌЖλЩоЬϊОβвйκЃоХυРвЦιЬнόCERT | |
| larkspur 2003-04-04, 8:40 pm |
| quote:
Well correct me if I am wrong but like wouldn't/couldn't the frame relay be riding on top of a T-1 line? From my understanding frame relay is just a protocol and not a actually physical medium. Much like ethernet compared Coax cable or UTP. I mean I seen all pictures of the CSU/DSU and what not whether built into special device or added to the router as a WIC. But I am more curious like what exactly is the T-1 line do they use HSSI? If I recall right HSSI has a pertty limited distance. Or do they use somthing completly different? I been told to look on the cisco site but I really don't know exactly where it is.
T-1 - A dedicated phone connection supporting data rates of 1.544Mbits per second. A T-1 line actually consists of 24 individual channels, each of which supports 64Kbits per second. Each 64Kbit/second channel can be configured to carry voice or data traffic. Most telephone companies allow you to buy just some of these individual channels, known as fractional T-1 access.
Frame realy comes in a frac t-1 or you can get a channelized t-1 (ds1) and plug it into a channel bank to help utilize 24 channels like 20 for point to point and 4 for frame relay.
HSSI is limited by distance but most telco's will have a repeater card(s) between niu and co (switch).
adsl is pretty popular to deliver t-1 speeds to the customer if you are close enough will be able to ride the 2 pairs instead of 4 pairs to the co. Adsl is easier to support
than some of the older t-1 cards.
If you noticed a black x jack hanging from the telco equipment or demarc. This type of jack is rj-45 and the copper that connects to cat 5 is spring loaded so they can test connectivity to your site by commands that will loop up the jack. But sometimes these do go bad so if you can get your hands on on eor two it can be helpful to the tech to help troubleshoot and sometimes help bring your service back up faster.
There is more but my fingers are getting tired and so just comes with experience.
Does this help ? | |
| yoyoyo123 2003-04-05, 9:42 am |
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LARKSPUR IS CORRECT CHRIS.
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