Well it seems I really have missed a important point (need to study
more!).
As pointed out bye
> From: Moore, C. Rodgers [mailto:[EMAIL PROTECTED]]
there's a protocol issue:
> Herold,
>
> The problem your going to have is Async PPP out of the 2515 and sync
PPP in
> the 3640. The formatting is different. Your ISDN TA will need to do
the
> conversion from async to sync. Motorola Bitsurfer or Adtran ISU
should be
> able to do this for you.
>
> CPU problems? no. This won't tax a 2500 series.
>
> Rodgers Moore
However due to other reasons the whole thing has been cancelled (sigh),
so don't expect any further update on this.
Bye
Heiko
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>-Original Message-
>From: Herold Heiko [mailto:[EMAIL PROTECTED]]
>Sent: Tuesday, August 29, 2000 10:53 AM
>To: List Cisco Groupstudy (E-mail)
>Subject: Aux + external ISDN-Modem <-> Bri ?
>
>
>Situation: local 3640 with bri ports present.
>Remote office, only router currently present: a 2515 used for a 64k
>framerelay connection. I need to connect that office to the local one
>with a interim solution (waiting for the real frame relay connection,
>couple of months unfortunately since it's international ecc), and was
>thinking:
>
>external ISDN Modem with serial port - Aux port un 2515
> |
> |
> |
>Bri on our 3640
>
>If the external Isdn modem does have a Hayes "AT" command set emulation
>I should be able to configure the 2515 just like if te ISDN adapter was
>a normal serial modem, right ? And configure a normal dialer
>on my local
>router on a bri port.
>BTW OS are 11.2 on both sides.
>The connection will be single channel (64k) only.
>Any idea what could go wrong, since one router will really work with a
>bri port while the other really will be configured for a serial modem ?
>There _should_ be at least a speed problem (as to
>http://www.cisco.com/warp/customer/76/9.html#port_speed the Aux on 2515
>seems to be limited to 38400) but I can live with that.
>However I'm more
>concerned with the serial interrupt problem, should I expect high cpu
>problems with a 64k frame relay+38400aux link, I'm expecting nothing
>else (no access lists, no route maps, static routing, fast switching
>everywhere I think) although I don't have (yet) the exact conf.
>
>If this could work, any experience on particular brands/models of
>ISDNmodem to avoid/prefer ?
>
>(I'll keep you informed on success/failure anyway)
>
>Thanks
>Heiko
>
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>
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