Here is a good link as well:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/inter_c/icserint.htm#xtocid241488
On Sun, 29 Oct 2000, Chuck Larrieu wrote:
> Normally I would make some righteous comment about looking it up on CCO, but
> I find that as usual, the information is not necessarily readily found.
>
> >From CCO:
> Asynchronous/Synchronous Port Features
> The low-speed asynchronous/synchronous ports connect terminals, printers,
> modems, microcomputers, and remote LANs over asynchronous serial lines to an
> internetwork, or to synchronous devices such as DSU/CSUs on the same ports.
> The asynchronous/ synchronous ports support data transmission rates of up to
> 115.2 kbps on the following serial interfaces:
> * EIA/TIA-232
> * EIA/TIA-449
> * EIA-530
> * V.35
> * X.21
>
> Does this help?
>
> Chuck
>
>
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of
> Brian
> Sent: Sunday, October 29, 2000 7:04 AM
> To: whatshakin
> Cc: [EMAIL PROTECTED]
> Subject: Re: Frame Switch
>
> On Sun, 29 Oct 2000, whatshakin wrote:
>
> > High speed (synchronous) ports are good for 2.048mb/s and the low speed
> > (asynchronous) ports max out at 115.2 Kb/s.
>
> we aren't talking about async ports though. The 252x is 4 syncrhonous
> ports. 2 low speed synchronous, and 2 high speed. I believe high speed
> sync ports can goto 4Mbps, and low speed to 64kps............I may be
> wrong though.
>
> Brian
>
>
> >
> >
> >
> > ----- Original Message -----
> > From: Brian <[EMAIL PROTECTED]>
> > Newsgroups: groupstudy.cisco
> > To: Austin <[EMAIL PROTECTED]>
> > Cc: <[EMAIL PROTECTED]>
> > Sent: Saturday, October 28, 2000 7:47 PM
> > Subject: Re: Frame Switch
> >
> >
> > > On Sat, 28 Oct 2000, Austin wrote:
> > >
> > > > I have a 2523 in my lab configured as a Frame Relay Switch.
> > > > All the serial ports are acting as DCE providing clocking to the
> > routers.
> > > > Initially, all clock rates were set to 64000 but I changed it to
> 1000000
> > ..
> > > > for some reason, only serial0 and serial1 accepted the new clockrate
> > speed f
> > > > 1000000 ... when i tried to enter the clock rate command on the others
> > it
> > > > says ... %Error: Unsupported clock rate for this interface .....
> > > > When I do a show interfaces ....
> > > > the output for serial0 and serial 1 ... the second line of the output
> > says
> > > > Hardware is HD64570 .............
> > > > for all the other serial interfaces ..... the second line of the
> output
> > says
> > > > Hardware
> > > > is CD2430 in sync mode .....
> > > > The keywords being "in sync mode" ... I am guessing that this might be
> a
> > > > reason I cannot set the clock rate on the other serial interfaces at
> > 1000000
> > > > ....
> > > >
> > > > Any ideas from anyone as to what is happening and why it is like that?
> > >
> > > on 252x routers, you have 2 "high speed" serial interfaces, and 2 "low
> > > speed" serial interfaces. High speed usually means that it can goto
> 4Mbps
> > > I believe. Cisco usually denotes a modular high speed interface with
> "T",
> > > as in like a NP-2T, or a NM-4T. Low speed usually means that it can
> goto
> > > 64kps. Low speed interfaces are denoted with an "S", like CSC-4S on a
> > > AGS+ is 4 low speed ports.
> > >
> > > Don't fret though, in a home lab this is fine usually. Even 4 low speed
> > > interfaces would allow you to do everything.
> > >
> > > Brian
> > >
> > >
> > >
> > > >
> > > > Thanks,
> > > >
> > > >
> > > >
> > > > _________________________________
> > > > FAQ, list archives, and subscription info:
> > http://www.groupstudy.com/list/cisco.html
> > > > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
> > > >
> > >
> > > -----------------------------------------------
> > > Brian Feeny, CCNP, CCDP [EMAIL PROTECTED]
> > > Network Administrator
> > > ShreveNet Inc. (ASN 11881)
> > >
> > > _________________________________
> > > FAQ, list archives, and subscription info:
> > http://www.groupstudy.com/list/cisco.html
> > > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
> > >
> >
> > _________________________________
> > FAQ, list archives, and subscription info:
> http://www.groupstudy.com/list/cisco.html
> > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
> >
>
> -----------------------------------------------
> Brian Feeny, CCNP, CCDP [EMAIL PROTECTED]
> Network Administrator
> ShreveNet Inc. (ASN 11881)
>
> _________________________________
> FAQ, list archives, and subscription info:
> http://www.groupstudy.com/list/cisco.html
> Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
>
-----------------------------------------------
Brian Feeny, CCNP, CCDP [EMAIL PROTECTED]
Network Administrator
ShreveNet Inc. (ASN 11881)
_________________________________
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
