sscott@fwhnm02.fwrdc.rtsg.mot.com (Steve Scott) (03/28/91)
I hope I get a definitive answer on this one (this time ;-) I have set up uucp on an 400s (50 MHz '030 version) computer system running HP-UX 7.03. I have connected a Telebit T2500 via the built in serial port (select code = 9). I have noticed that when using cu to the modem and asking for the register set (for example), that at times characters are dropped. My immediate solution was to turn on XON/XOFF handshaking. The problem is, this doesn't work well with my uucp feed. The conversation freezes in mid-stream. So, I need to do hardware handshaking. Oh yeah, I have the computer interface set at 9600 baud and I have set up the TB to lock the RS232 interface to 9600 baud. I would LIKE to go at 19.2k baud. Okay, the problem is: I have been told that hardware handshaking does not work (or works not very well) on the built-in serial port. Is this true? If so, what can I do about it? Is there a special driver or a specific method of setting up the device special file (other than specifying a modem connection) to resolve this problem? I have heard (through the grapevine ;-) that release 7.05 will resolve this problem. Is THIS true? I have not gotten a lot of empirical data on how many characters dropped, number of retries required, etc. as I have just gotten uucp set up. But, based on a day or two experience in interactive mode, it appears that I am going to have problems. Any ideas, suggestions, comments, RTFM's? Thanks, -- +------------------------------------------------------------------------------+ | Steve Scott | Internet: sscott@mot.com | | Fort Worth Research and Development Center | UUCP: csccat!camdev!sscott | | Cellular Infrastructure Group | Internal: TX14/1D | | Radio Telephone Systems Group | Voice: (817) 232-6317 | | Motorola, Inc. | Fax: (817) 232-6081 | | The opinions contained herein are STRICTLY my own | +------------------------------------------------------------------------------+
rjn@hpfcso.FC.HP.COM (Bob Niland) (03/31/91)
re: > I have set up uucp on an 400s (50 MHz '030 version) computer system > running HP-UX 7.03. I have connected a Telebit T2500 via the built in > serial port (select code = 9). > I have noticed that when using cu to the modem and asking for the register > set (for example), that at times characters are dropped. My immediate > solution was to turn on XON/XOFF handshaking. The problem is, this > doesn't work well with my uucp feed. You need to turn on the 16 byte FIFO and maybe CTS/RTS flow control on port 9. Prior to release 7.05 (i.e., in 7.0 or 7.03) you need a patch. At 7.05, the patch (shar) is still useful because of the documentation it provides. > If so, what can I do about it? Is there a special driver or a specific > method of setting up the device special file (other than specifying a > modem connection) to resolve this problem? I have heard (through the > grapevine ;-) that release 7.05 will resolve this problem. Is THIS true? Request a copy of the "Centronics/Serial" patch from your local HP support rep. If they don't have it, have them contact me, as I am the supplier (it is not on our normal field support patch system). Regards, Hewlett-Packard Bob Niland Internet: rjn@FC.HP.COM 3404 East Harmony Road UUCP: [hplabs|hpfcse]!hpfcrjn!rjn Ft Collins CO 80525-9599