| ??? 02/10/05 09:22 Read: times |
#87069 - Modem speed 2 Responding to: ???'s previous message |
Andy Neil said:
Remember that an analogue modem cannot ever send over 34k or so over an analogue phone line. While DCE-DCE (modem-to-modem) speed is max.33600 bps (using V.34), thanks to compression (V42) the DTE-DCE (mcu/PC-to-modem) peak rate may be substantially higher. Andy Neil said:
Also, if you are only sending small amounts of data at a time, it can actually be qucker to use a slow modem rather than a fast one! This is because fast modems take a long time to "train." It is not necessary to use a slow modem; almost any modern modems can limit the acceptable range of modulations and speeds. For example, for Rockwell/Conexant-based modems, see the AT+MS command. Jan Waclawek |
| Topic | Author | Date |
| Re: Remote download data file from 8051 | 01/01/70 00:00 | |
| Use a protocol | 01/01/70 00:00 | |
| MUST use handshake | 01/01/70 00:00 | |
| Sector size | 01/01/70 00:00 | |
| Modem speed - how much data? | 01/01/70 00:00 | |
| Modem speed 2 | 01/01/70 00:00 | |
All true | 01/01/70 00:00 |