Remember that the ports are synchronous i.e. timed. In a back-to-back lab
scenario one end is configured as DCE and sets the clockrate. So while the
maximum speed of the standard serial (2Mbs) and the sync/async serial
(115kbs) ports are different they can still agree on a common speed.
To others who had additional questions.
2520 one Ethernet, one ISDN BRI S/T, two serial, two sync/async serial (60
pin)
2521 one Token Ring, one ISDN BRI S/T, two serial, two sync/async serial
2522 one Ethernet, one ISDN BRI S/T, two serial, eight sync/async serial
2523 one Token Ring, one ISDN BRI S/T, two serial, eight sync/async serial
So, yes, any of these routers can be used as a Frame Switch or any
application where multiple serial ports are required on one router.
IMHO a good basic routing lab would consist of a 2503, 2513, 2523, 2509.
I haven't checked prices lately but seem to remember 2523s on eBay in the
$800-900 range. 2522s at about $1100.
> -----Original Message-----
> From: Ole Drews Jensen [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, June 28, 2001 4:52 PM
> To: 'Daniel Cotts'; [EMAIL PROTECTED]
> Subject: RE: Five-in-one synchronous serial [7:10312]
>
>
> Thanks Daniel,
>
> I am not that technical in this area yet, but does that mean
> that I can
> connect four 2501's to one 2520 with two 2501's connected to the "same
> speed" interfaces, and the other two 2501's to the low speed
> interfaces?
>
> I was not aware that you could connect a high speed synchronous serial
> interface to a low speed synchronous serial interface.
>
> I was thinking about maybe a 2610 with 2 WAN interface cards,
> each with 2
> synchronous ports, but I haven't calculated what that would
> cost me yet.
>
> Thanks,
>
> Ole
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Ole Drews Jensen
> Systems Network Manager
> CCNA, MCSE, MCP+I
> RWR Enterprises, Inc.
> [EMAIL PROTECTED]
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> http://www.OleDrews.com/CCNP
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> NEED A JOB ???
> http://www.oledrews.com/job
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
>
> -----Original Message-----
> From: Daniel Cotts [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, June 28, 2001 4:51 PM
> To: 'Ole Drews Jensen'; [EMAIL PROTECTED]
> Subject: RE: Five-in-one synchronous serial [7:10312]
>
>
> Consider anything in the 2520-2523 range. They have two sync
> serial that
> will do a max of 2 Mbs but the other ports will do up to
> 115kbs sync. If you
> want all 2Mbs ports then consider a 4500M with a four port
> serial module.
>
> > -----Original Message-----
> > From: Ole Drews Jensen [mailto:[EMAIL PROTECTED]]
> > Sent: Thursday, June 28, 2001 3:26 PM
> > To: [EMAIL PROTECTED]
> > Subject: Five-in-one synchronous serial [7:10312]
> >
> >
> > I am looking for a router with 3 or more synchronous serial
> > ports for my
> > lab, but all the fixed 2500 models only have a max of two.
> >
> > I can see that you can get a five-in-one synchronous serial
> > WAN interface
> > card for the 2524 and 2525, but does that mean that I can
> connect five
> > different 2501's (to take an example) to this one port with a
> > special cable?
> >
> > Also, would that be the best and/or cheapest solution, or can
> > some of you
> > with labs at home throw me a good idea what to look for?
> >
> > I need the same kind of synchronous DB60 serial ports as my
> > 2501's/2502's
> > have.
> >
> > Thanks,
> >
> > Ole
> >
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > Ole Drews Jensen
> > Systems Network Manager
> > CCNA, MCSE, MCP+I
> > RWR Enterprises, Inc.
> > [EMAIL PROTECTED]
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > http://www.OleDrews.com/CCNP
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > NEED A JOB ???
> > http://www.oledrews.com/job
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > Report misconduct
> > and Nondisclosure violations to [EMAIL PROTECTED]
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