| ??? 02/11/07 03:50 Modified: 02/11/07 04:36 Read: times |
#132503 - Interfacing 8051 to Voice Modem |
Hello again guys, this is the second time i am asking for help here and the first time was a huge success thanks to everyone who helped me :)
Here's my current situation : My objective is to accomplish DTMF dial up and then transmit voice to the receiver since the connection is established. 1. I am trying to interface my AT89C51ED to a conventional old serial 56k modem through RS232 and sending AT command from there. Yes, i already have the AT Command set for this modem chipset which is Lucent Venus. Is this feasible? Since the modem is quite bulky and i thought there might be a more appropriate way to implement this. 2. I have searched around forum and came across 2 dialer chips which is MT8880 and TEA1062. As far as i am concerned, MT8880 does not support voice transmission, am i wrong? However, i am quite interested about TEA1062 though, but i have absolutely no idea how to use the chip yet. I was understood that it is supposed to be used along with the MT8880 which in turn send the DTMF signal to TEA1062? Am i right? 3. I would like to know a comparison between this 2 methods. Which are simpler to be implemented, in term of ease of programming and interfacing (Oh yes, i am using C Programming btw, not ASM). How should i proceed from there? Any hints/clue are very welcomed, even brief one! Please advise me! Thank you very much! |
| Topic | Author | Date |
| Interfacing 8051 to Voice Modem | 01/01/70 00:00 | |
| DTMF | 01/01/70 00:00 | |
| 56k Modem vs MT8880+TEA1062 | 01/01/70 00:00 | |
| external modem and voice? | 01/01/70 00:00 | |
| It's a voice modem | 01/01/70 00:00 | |
| Interfacing to modem | 01/01/70 00:00 | |
| Voice | 01/01/70 00:00 | |
| Line Interface | 01/01/70 00:00 | |
| Thanks for the head-up | 01/01/70 00:00 | |
| RS232 + AT commands? | 01/01/70 00:00 | |
| http://members.aol.com/cpu8052/modem1.html | 01/01/70 00:00 | |
| Rgd the schematic | 01/01/70 00:00 | |
| Yup, just be carefull... | 01/01/70 00:00 | |
| Even better! | 01/01/70 00:00 | |
| Heads up on the schematic | 01/01/70 00:00 | |
| Will do, big thanks | 01/01/70 00:00 | |
| Unusable code? | 01/01/70 00:00 | |
| Code is usable. (Modem1.asm) | 01/01/70 00:00 | |
| So you should know better! | 01/01/70 00:00 | |
have you not heard of 'reading the manual'? | 01/01/70 00:00 | |
| A Project of two halves! | 01/01/70 00:00 |