cable question and aui connector

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1- is this aui connector still used and where ?

2- there is a cable i mean serial cable used between routers (dte - dce) also there is an rs-232 cable
then its serial too what is the difference among these two? are both of these rs-232 cable ?

 

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Yes. One of our telephone exchanges uses them, and one we have just decommissioned used them.

Depends on how pedantic you are over the use of RS-232 (nowadays correctly called EIA-232).

Most people use the term RS232 to mean all serial, which may not be absolutely correct. For example, X.21 is 'serial', but isn't strictly EIA-232.

So you need to check the router specs to see what you actualy have.

Harry.

 

from pc to modem again rs-232 ?

although being so silly question i wanna ask one more

from pc to switch or from pc to router should we only use console cable ? (i think it is only used to configure router or switch but where are the interfaces ?)

 

Traditional modems are usualy RS-232, as that has traditionaly been one of the standard ports available on a PC.

Depends on the switch or router. The 2950 I have here can be configured either via console port or over the network. Obviously you will need to use the console port on a completely unconfigured switch.

Harry.

 

kobem,

It depends on the type of modem. What kind of PC do you have? What kind of modem do you have?

This is not one more question.

 

nowadays modems like dsl modems doesn't contain rs - 232 port i only witnessed ethernet port or usb ..

secondly i didn't want to say about console port ...

consider there are two routers linked each other and under each router there are pcs
like


ethernet
pc--------- router1======router2---------- pc

router1======router2

ethernet
router2---------- pc

according to my schema between pc and router 1 then between router2 and pc ETHERNET IS AVAILABLE SO THAT THERE HAS TO BE AN ETHERNET CABLE AM I WRONG (EXCEPT CONSOLE CABLE)?

 

i meant analog modem but where are they used in these days? i do not use these types i have dsl modem ..

 

That is why I said 'traditional modems'. I'll put it another way - modems that signal within the speech-band, such as V.90 and V.92, normaly use an RS-232 cable.

For the above I'd use Ethernet throughout.

Harry.

 

They are used where either DSL is not available, or is too expensive. The company I work for is an ISP and still has a considerable number of customers dialing in with V.90 modems.

Harry.

 

i got what you tried to tell me here : you say if you give ip addresses and configured the router or switch
before by telnetting to specified interface you may continue configuring from command console

but my purpose wasn't that and i told it on my previous reply

 

kobem,

Analog modems are used for dialup access. For some, that's the only option if they don't have broadband access.

 

what do you mean by this ? "For the above I'd use Ethernet throughout".


is it this : you configure router or switch(unconfigured) building a console (rolled)cable
however , pc to router 1 ------->ethernet (cat 5 cross)
router2 to pc -------> ethernet (cat 5 cross)

AM I WRONG HERE?

 

I'm getting confused here as I don't really know what you are asking.

During the config phase you would use a rollover cable to the console port from a pc to do this.
After the config is done connect each PC to the router ethernet ports with an uncrossed ethernet cable, and connect the routers together with a crossed or uncrossed ethernet cable, depending on whether the ports were auto-mdx or how they were configured.

Harry.

 

yeah but i didn't want to say that ethernet cable (cat 5) is used for "maintaining the configuration only"

it should also be used (between router and pc) to ping the router ethernet interface for instance

is this true?

 

I think that is what I just said.

Harry.

 

hm , just a minute for think