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- Path: sobt.ao.net!user
- From: eric@ao.net (Eric Shaw)
- Newsgroups: comp.dcom.modems
- Subject: Re: Supra 288 slow connection speeds
- Date: Mon, 01 Apr 1996 23:31:05 -0500
- Organization: Access Orlando
- Message-ID: <eric-0104962331060001@sobt.ao.net>
- References: <Dp57t5.6oy@ez2.ezlink.com>
- NNTP-Posting-Host: sobt.ao.net
-
- In article <Dp57t5.6oy@ez2.ezlink.com>, alan@ez2.ezlink.com (Alan L.
- Wendt) wrote:
-
- >I have 8 Supra external 288 modems on my BBS system. Many of them seem
- >only to connect at 9600 baud. To try to isolate the problem I experimented
- >with three modems, designated C9, C10, and C15. I made various calls between
- >the modems and observed the following:
- >
- >C15 calling C10 28.8K
- >C9 calling C10 9600
- >C15 calling C10 28.8K
- >C10 calling C15 28.8K
- >C9 calling C15 9600
-
- >I used a source compare program to highlight the differences between
- >the two configs. C10 (the fast one) seems to have separate receive
- >and transmit line speeds, which is odd because the two modems have the
- >same ROM: V1.300-13-V34_DS. And C9 seems to enable RDL, whatever
- >that is (remote download?). S23 is different; this is not documented
- >in my manual.
-
- The problem is the S23. This is a bitmapped register, and the setting of
- 58 in binary is 00111010. This breaks down as follows:
- Bit 0=0 (RDL not allowed (&T5) - this is not the default (&T4))
- Bits 1-3=101 (assumed DTE is 9600 - here's your problem - default is 111
- (38400 or higher)
- Bits 4-5=11 (assumed DTE parity is none - this is default)
- Bits 6-7=00 (no guard tone (default))
-
- So the default S23 value is 00111111 = 63, meaning modem C10 isn't
- configured as default either, but its closer.
-
- For more complete documentation, look at
- ftp://ftp.supra.com/pub/flashers_current/v34/v34_list.txt
-
- This is in the archive with the flash upgrade also.
-