joseph@milton.u.washington.edu (Joseph Chan) (03/19/91)
We got several V32 9600baud modems. I have not got them to talk at 9600 baud rate. They work at 2400 baud. I suspect that the phone line (we had) may have trouble to connect at 9600 baud. To determine this, I would need a simple phone line simulator, such that I can connect two modems together with go through the local phone line. Could anyone show me how to make a simple phone line simulator? Thank you.
mark@uunet.uu.net (Mark Oberg) (03/23/91)
In article <telecom11.218.7@eecs.nwu.edu> joseph@milton.u.washington. edu (Joseph Chan) writes: > We got several V32 9600baud modems. I have not got them to talk at > 9600 baud rate. They work at 2400 baud. I suspect that the phone > line (we had) may have trouble to connect at 9600 baud. To determine > this, I would need a simple phone line simulator, such that I can > connect two modems together with go through the local phone line. > Could anyone show me how to make a simple phone line simulator? Thank > you. I once wanted to do something similar and found that if I connected the two modems together with a RJ-11 type cord I could get them to talk to each other by placing each modem on it's own terminal program (and computer) and instructing one modem to "ATO" (Hayes for go online) and the other to "ATA" (Hayes for answer a call). The two modems will send their carrier and handshake sequence, connect, and you can send data between them. No need for a phone line simulator; just a phone cord. Mark Oberg - Voice: Northstar Telecom, Inc. (301) 964-0505 UUCP: uunet!grout!mark Fidonet: 1:109/506 & 1:261/1067 BBS: No Place Like Home - (301) 596-6450 & (301) 730-9072
peter@taronga.hackercorp.com (Peter da Silva) (03/25/91)
I would like to note that if your phone line is hostile to V.32 9600 baud connectios, you might try Telebit Trailblazers. They connect at a nominal 19200 baud, and the actual transfer rate is 18000 baud down in 100 baud increments until they find a set of frequencies they can live with. This is before any compression is applied to the connection. The only places I've found that faze Trailblazers are London, England and some Sprint long-distance connections. peter@taronga.uucp.ferranti.com