| ??? 02/07/05 08:39 Read: times |
#86724 - A low-pass filter! Responding to: ???'s previous message |
Paul Mcdowell said:
Is there anything that would prevent you from sending a high frequecy signal across a telephone system. A standard analogue subscriber line has a frequency range of 400Hz - 4kHz. This is digitised by sampling at 8kHz at the local exchange - so there's nothing you can do to extend it. (xDSL all rely upon special equipment installed in the exchange) Your phone company might be able to supply some sort of extended-range analogue line but, these days, I expect you'd have to go digital |
| Topic | Author | Date |
| sending high frequency signal over phone | 01/01/70 00:00 | |
| sending high frequency | 01/01/70 00:00 | |
| High Freq | 01/01/70 00:00 | |
| A low-pass filter! | 01/01/70 00:00 | |
| Why oh why | 01/01/70 00:00 | |
| a possible why | 01/01/70 00:00 | |
| Unfortunately not. :-( | 01/01/70 00:00 | |
| Annoying telemarketers | 01/01/70 00:00 | |
| Special Information Tone - SIT | 01/01/70 00:00 | |
| oh no | 01/01/70 00:00 | |
| CMX850 | 01/01/70 00:00 | |
| this is what i am pondering | 01/01/70 00:00 | |
| this is what i am pondering | 01/01/70 00:00 | |
| that is called a modem | 01/01/70 00:00 | |
| im not wanting to get on the net | 01/01/70 00:00 | |
| modem and the net | 01/01/70 00:00 | |
| Modems and Video | 01/01/70 00:00 | |
| 56K | 01/01/70 00:00 | |
| Video | 01/01/70 00:00 | |
| details | 01/01/70 00:00 | |
| Yes, it *is* a modem! | 01/01/70 00:00 | |
| ok there is some confusion | 01/01/70 00:00 | |
| confusion all right ... | 01/01/70 00:00 | |
| suggested texts | 01/01/70 00:00 | |
| Confusion | 01/01/70 00:00 | |
Watching movies over the phone | 01/01/70 00:00 |