Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations John Tel on being selected by the Tek-Tips community for having the most helpful posts in the forums last week. Way to Go!
Need reading material
- Thread starter jhill7000
- Start date
not a very good one Newton's Telcom Dictonary has a list of terms, not just for merridian products but it might help with some terms.. this web site and nortels merl (meridian ref lib) a soft copy of all the manuals that they publish might help.. be warned it's several thousand pages long and covers every product and feature that nortel voice side pbx has.. compared to the data world this is a different lang as well an job description...
john poole
bellsouth business
columbia,sc
john poole
bellsouth business
columbia,sc
- Thread starter
- #4
I have quickly learned that what you say is true. I'm looking for a good place to find what things mean across the board, how circuit switching works (compaired to packet switching), etc. I guess I'll dive into the pages upon pages. I was hopeing there would be a consice "Here is what you need to know about voice" manual somewhere. I guess all you voice guys "just know" what a PRI is or how it work or what the D-Channnel does, etc. Thanks, John.
a pri is 1.54 mega bits, 23 b channels (barrier) and one dch (data) the d is used for setup and tear down of the call, the barrier channels are used for 64k of voice or data. the old non pri t1's are 1.54 meg 24 channels each 64k and each one used 8 k overhead for setup and tear down.. a single d can switch 23 pris, but i've never tried using a single with a back up on more the 8 pri's...
packet switching is very unique as compared to voice.. each packet has the source address and the dest address with all the subnet mask etc febn becn etc etc for voice if you dial 9 1 213 555 1212 from outside the 213 area code, in my switch i drop the 9, my switch uses it to tell me it's outside the switch (takes me to ld 90) since the npa (area code) is 1213, i delete the 1 and send it to my ld carrier, he already knows it's ld if i send it to him, he routes to a pri to LA main but he deletes the 213, since LA main knows the call is for the 213, LA main (a central office) looks at the 1st 3 digits, 555 and routes the call to a pbx that handles information for that office.... same thing happens if you call me the last step is downtown central office see's my nxx and send me just the last 4 digits, with pri i also get the calling number and name on my dch... so pstn switching is a carry over from the mechanical days and before (manual operators)... now voice is sent as data packets after the setup, and teardown is still removing a 600 ohm short on the far end..
john poole
bellsouth business
columbia,sc
packet switching is very unique as compared to voice.. each packet has the source address and the dest address with all the subnet mask etc febn becn etc etc for voice if you dial 9 1 213 555 1212 from outside the 213 area code, in my switch i drop the 9, my switch uses it to tell me it's outside the switch (takes me to ld 90) since the npa (area code) is 1213, i delete the 1 and send it to my ld carrier, he already knows it's ld if i send it to him, he routes to a pri to LA main but he deletes the 213, since LA main knows the call is for the 213, LA main (a central office) looks at the 1st 3 digits, 555 and routes the call to a pbx that handles information for that office.... same thing happens if you call me the last step is downtown central office see's my nxx and send me just the last 4 digits, with pri i also get the calling number and name on my dch... so pstn switching is a carry over from the mechanical days and before (manual operators)... now voice is sent as data packets after the setup, and teardown is still removing a 600 ohm short on the far end..
john poole
bellsouth business
columbia,sc
Try this site I have not seen the book but have talked to people that have and they said it was well worth the small amount.
another site that has some help files is ghtrout, he has a link in all his post. if you have a few terms you need to clear up, post them here, i usually have time after hours if you don't mind my rambling style.. i'm old and tend to have post that are way to long, but as a former instructor i don't have a clue as to where you are on the learning curve
john poole
bellsouth business
columbia,sc
john poole
bellsouth business
columbia,sc
- Thread starter
- #8
We'll I've been working this switch (mostly with the help of this site) for about 9 months now. I can build phones, CDN's, IDC tables, work symposium, callpilot, etc. and I'm just getting into routes. The problem is I don't know the terminology behind what I'm doing, or how it all fits together. I come from the data world so once I learn what some of the acronyms mean it sometimes makes sense to me.
I have an instructor in one of my classes who worked at bell labs for years who's going to recommend some books, if I find one that fits percisely what I need I'll post it here.
Other than that, I might be picking your brain alot John, tell me if I get annoying.
I have an instructor in one of my classes who worked at bell labs for years who's going to recommend some books, if I find one that fits percisely what I need I'll post it here.
Other than that, I might be picking your brain alot John, tell me if I get annoying.
good thing about this site, if i am busy or off work someone will answer and when one of us make a mistake, someone will catch it and usually it's very quick.. you've came a long way (symposium) for a data guy, they can be hard to train... lol
john poole
bellsouth business
columbia,sc
john poole
bellsouth business
columbia,sc
- Thread starter
- #10
i've played in both worlds and do know some of the sharpest i've met are the new generation cisco certified kids, i can do cisco routers and ccm's ok and networking is not that big of a trick, but that stuff can get real deep real fast.. anyone that want's to learn both can, just need to realize that both fields require effort..
john poole
bellsouth business
columbia,sc
john poole
bellsouth business
columbia,sc
- Status
Similar threads
