On 1/24/2018 7:55 AM, Devin Heitmueller via vcf-midatlantic wrote:
On Tue, Jan 23, 2018 at 5:33 PM, Herb Johnson via vcf-midatlantic <vcf-midatlantic@lists.vintagecomputerfederation.org> wrote:
Anyone have Hayes 2400 Baud Smartmodem floating around? The two specific Hays models I am interested in are 217AA and 07-00056. Why only 2400 baud modems? Don't faster modems fall back to 2400? Why I cannot speak to why he wants a 2400 bps modem, I will say that yes, all modems even the latest 56k modems will negotiate down to 300 bps. That's one of the reason the training sequence takes as long as it does during call setup (it starts at the lowest baud rate and works its way up). OT poster here - There is prior art that successfully used these two 2400 bps models. Even though the BBS will eventually use an ISDN PRI for PSTN access, folks dialing into it may be (unknowingly) using IP from their end
Training downward with an ever-changing SIP connection is known to be problematic. 2400 bps hopefully will provide a more reliable connection when SIP is involved. Martin