thank you for answer to:
heha@biochem.mpg.de (Herbert Hanewinkel)
jzeitlin@Ascend.COM (Jim Zeitlin)
Greg Onufer <Greg.Onufer@Eng.Sun.COM>
my original question was:
> Hello
>
> I try to connect a PC running PC/TCP to a SPARCstation 10 over ISDN using ppp:
>
> On the PC side I use a Terminal Adapter connected with a serial port. On the Sun side
> I use the internal ISDN interface and the driver package SunISDN.
>
> A connection on the physical layer get established but on the ppp layer it doesn't work.
>Has anybody ever tried to do this ?
>
>The TA is running V.120 protocol in the B channel. What protocol is Sun using ?
answers:
>From heha@biochem.mpg.de Fri Apr 22 09:25:22 1994
Date: Fri, 22 Apr 1994 09:15:46 +0100
From: heha@biochem.mpg.de (Herbert Hanewinkel)
Subject: Re: Solaris ISDN, other ISDN and ppp
Organization: Max-Planck-Institut fuer Biochemie
In article <1994Apr21.151728.10798@ntb.ch>, you wrote:
> Hello
>
> I try to connect a PC running PC/TCP to a SPARCstation 10 over ISDN using ppp:
>
> On the PC side I use a Terminal Adapter connected with a serial port. On the Sun side
> I use the internal ISDN interface and the driver package SunISDN.
>
> A connection on the physical layer get established but on the ppp layer it doesn't work.
Hello,
PC/TCP uses asynchronous PPP (encapsulation with Byte stuffing),
while the Sun uses synchronous PPP (encapsulation with HDLC Bitstuffing).
For this reason this will NOT work.
To connect a PC to a Sun, you can by an ISDN board with a CAPI 1.1
software and use my PacketDriver ISPA to communicate to the Sun via PPP.
ISPA is availlable on ftp.biochem.mpg.de.
Herbert Hanewinkel
>From jzeitlin@Ascend.COM (Jim Zeitlin)
Subject: Re: Solaris ISDN, other ISDN and ppp
Date: 21 Apr 1994 21:11:37 GMT
Organization: Ascend Communications, Inc.
In article <1994Apr21.151728.10798@ntb.ch>,
Thomas Gusset <gusset@sparc1.ntb.ch> wrote:
> Hello
>
> I try to connect a PC running PC/TCP to a SPARCstation 10 over ISDN using ppp:
>
> On the PC side I use a Terminal Adapter connected with a serial port. On the Sun side
> I use the internal ISDN interface and the driver package SunISDN.
Thomas-
This is not going to work, the PC is sending Asynch PPP packets
( character framed ) to the TA, which is then encapsulating them using V.120
protocol over the synch ISDN B-channel. The SUN on the other hand is
generating and expecting synch PPP ( HDLC framed ) packets on the
B-channel. While data content of the frames are the same, they are using
are encapsulated diferently and are not compatible. You need a ISDN card, or
ISDN router, or "asynch PPPto synch PPP converting TA" on the PC side. My
company ( as an example only ) makes a line of access devices that
interoperate with Sun PPP over ISDN.
-- Jim Zeitlin Ascend Communications 510 814 2375 jzeitlin@ascend.com>From Greg.Onufer@Eng.Sun.COM Fri Apr 22 22:21:26 1994 To: gusset@sparc1.ntb.ch (Thomas Gusset) Subject: Re: Solaris ISDN, other ISDN and ppp Date: Fri, 22 Apr 1994 12:56:50 -0700 From: Greg Onufer <Greg.Onufer@Eng.Sun.COM>
In comp.unix.solaris you write: >Has anybody ever tried to do this ?
No, because it will not work.
>The TA is running V.120 protocol in the B channel. What protocol is Sun using ?
Straight HDLC framing over the synchronous serial interface. No asynch<->sync (V.120) is needed since asynch is never needed.
If you need more info let me know.
Cheers!greg
---
@@@@@@@@@@@@@@@@@ ******************************************************* @ @ @@ @@@@@ Thomas Gusset, Neu-Technikum Buchs, CH-9470 BUCHS @@ @ @@ @ @ Abteilung Informatik Switzerland @ @ @ @@ @@@@@ phone: ++41 81 755 33 86 fax: ++41 81 756 54 34 @ @@ @@ @ @ E-Mail: Gusset@ntb.ch @ @ @@ @@@@@ *******************************************************
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