Frame-relay question

In the real world what does the serial interface plugs into to establish a frame-relay connection? I know in a lb environment you would connect to a frame-relay switch but a in the real world, what would you connect it to.

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keenon

you would connect it to a "smart jack" or the service providers demarc equipment that would facilitate your connection to a frame switch back at your local co

this would use a RJ45 connector

Netstudent

Most of the time, the demarcation equipment will be a CSU. Channel Service Unit..This basically prepares the the Frame to transmit onto a T1 circuit. A CSU can terminate more than one T1 as well. It has many uses depending on the intelligence of the device. Things like loopback testing and T1 keepalives.

Ciscopimpenator

Real World Scenario

Telco

>CSU/DSU--->Router
T1 line

In small businesses usually the router plugs into a CSU/DSU via the serial cables.

nice343

Ciscopimpenator wrote:

Real World Scenario

Telco
>CSU/DSU--->Router
T1 line

In small businesses usually the router plugs into a CSU/DSU via the serial cables.

who will supply the csu/dscu. Is it the telco or you ?

jvax

nice343 wrote:

who will supply the csu/dscu. Is it the telco or you ?

If you don't have one, the Telco should supply one. You can rent one from them I think.

nice343

Can anyone show me a pic of a router plugged into a CSU/DSU which is also plugged into a leased line.

thanks

Netstudent

http://www.more.net/technical/netserv/routers/cisco1720/images/dsu-router-connection-w.jpg

markzab

Net, you can use the image button when posting a link like that to get this...

nice343

thanks guys

one more question . The cable connecting to the router is a SERIAL MALE DTE V.35 right?

Aquabat [banned]

that's right, all serial ports are DTE buy default also

kafifi13

Mark that's great. At my work they are having me do a "telcom Word of the day" todays word was CSU/DSU and that's the same pic i used.

markzab

kafifi13 wrote:

Mark that's great. At my work they are having me do a "telcom Word of the day" todays word was CSU/DSU and that's the same pic i used.

Actually the image was from the poster above me. I just enabled the image in the thread instead of the link. Can't take credit for someone elses work.

Netstudent

thanks Mark

mobri09

oooo nice pic and explaination!

nice343

aynone has a pic of an ATM conenction?

I know this is not covered but I want to see how an ATM looks like.

Netstudent

Paul Boz

I'll take a picture of a Nokia D50 DSLAM remote line card shelf for you on Monday, when I'm back at work. It's connected via ATM to the CBX aggregator. In fact, I'll take a few pictures of some other ISP grade fiber equipment if you want.

nice343

Paul Boz wrote:

I'll take a picture of a Nokia D50 DSLAM remote line card shelf for you on Monday, when I'm back at work. It's connected via ATM to the CBX aggregator. In fact, I'll take a few pictures of some other ISP grade fiber equipment if you want.

yes I want to see them

lildeezul

damn i never seen an ATM.

that mother is huge. lol