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- Xref: sparky comp.dcom.modems:17996 comp.sys.sun.admin:9327 comp.sys.sun.hardware:6180
- Newsgroups: ch.sun-managers,comp.dcom.modems,comp.sys.sun.admin,comp.sys.sun.hardware
- Path: sparky!uunet!mcsun!chsun!hslrswi!osicki
- From: osicki@hasler.ascom.ch (Chris Osicki)
- Subject: SUMMARY: V.32BIS / Sun workstation problem
- Message-ID: <1992Dec11.160337.11256@hasler.ascom.ch>
- Originator: osicki@polaris
- Sender: news@hasler.ascom.ch
- Reply-To: osicki@hasler.ascom.ch
- Organization: Ascom Hasler AG
- Date: Fri, 11 Dec 1992 16:03:37 GMT
- Lines: 59
-
-
-
- My original posting:
-
- >Configuration: Zyxel U-1496 modem connected on ttya (tty speed set to 38400)
- > Sun ELC & Sun IPC, SunOS 4.1.2
-
- >When a connection is made at 14400, V.42, V.42BIS many characters are 'lost'.
- >Connecting a vt220 directly to the modem instead of the ELC no characters
- >are lost. Is this a known problem in that Suns serial ports cannot handle
- >data at high speeds? If yes, are there any solutions (H/W or S/W) which
- >solve this.
-
- The explanation (not solution) of this problem is easy:
- the serial port driver 'zs' doesn't support correctly hardware flow control.
- To be more precise, 'zs' only does CTS flow control - stops sending when modem
- drops CTS, but does not drop RTS when data from modem arrives to fast.
- This is a fact, and our SUN support confirmed this ! The people who believe
- in Sun's hardware flow control and didn't see any problems are lucky.
-
- Now the possible solutions:
-
- 1. Sun offered me a High Speed Serial I/O card for sFr 5490 ( ~ 4000 $, it is
- not an april fool, yes, four thousand dollars )
-
- 2. SUN's high-speed serial driver for up to 38.4 Kbps. I didn't get the price
- from SUN support yet, but the prices I have heard about are:
- $950/cpu, $2850 for 10 and $5700 for a site license.
- This also sounds like a joke but is not one.
-
- 3. Get a third party serial S-bus expansion board. I don't have any info yet
- but I know they exist, and I could imagine the cost would be something between
- 10 * PC-I/O card and 1/10 of SUN High Speed card.
-
- 4. Write your own serial port driver ( send me a copy ;-) )
-
- 5. Use software flow control XON/XOFF. It works for me.
-
- 6. Other possible solutions have nothing to do with SUN and thus with this
- news group ;-).
-
-
- Our SUN support told me that the maximum supported serial port speed is
- 9600 bps. This speed seams to be for SUN the state of the art. Pay if you want
- more. Once more SUN try to sell us something that should be part of the system.
-
- If you are interrested in all the replies I received, let me know and I will
- make them ftpable.
-
- Thanks once more to all who replied. I tried to thank everybody by mail,
- hope I didn't miss anyone.
-
- Chris
-
-
- Chris Osicki ( osicki@hasler.ascom.ch )
- System and Network Administrator
- Ascom Hasler AG, Abt 85L2, Freiburgstr. 251,
- CH 3000 Bern 18, Switzerland. Tel: +41 31 999 38 07, Fax: +41 31 991 37 35
-