uggora@sunybcs.UUCP (02/13/87)
can anyone tell me about " High speed frequency-agile modem ? What is it ? Informations , Please ? Thank you Michael gora. SUNY at Buffalo
berger@clio.UUCP (02/16/87)
I think that's a modem that divides the phone line into several bands, and uses each one as a lower-than-total-throughput-rate data channel, multiplexing and de-multiplexing the data at each end. Problems with these modems include the need to have an identical modem at the other end for compatibility, unpredictible (and varying, even over one phone call) baud rate, and substantial penalties for more than casual use of the reverse channel (in other words, it's technically full duplex, but at a big sacrifice in throughput).
dave@onfcanim.UUCP (02/19/87)
The term describes modems that are used in broadband networks. They are "high-speed" because they operate at relatively high bit rates (200 Kbps or 1Mbps or perhaps higher), modulating an RF carrier up in the high tens or hundreds of MHz. They are "frequency-agile" because they are able to operate on any one of a group of adjacent frequencies, which gives the effect of several independent networks sharing the same cable and a modem able to connect to any one of the networks via software command.