| ??? 01/28/03 14:47 Read: times |
#37503 - Here is what iam trying to Do |
Basically iam planning to design a 8 lines digital Intercom System using 8051, anaglow switch 8816, in which 8 pulse dailing telephones can be connected and each can talk with other using a specific dial digit. This is same like PBX but there is no external telephone service line like BT british telecom..etc.. so its not a PBX and does not require a Telephone Line Card which intrefaces the outside line with the PBX....
No i don't want to use any 555 timer IC for creating the Tone when ever the Telephone goes "off-hook". So instead i want the controller to be used as a tone generator so i want to write such a program which cause a Tone like sound when ever any telephone goes off-hook. |
| Topic | Author | Date |
| Telephone Tone Generator Delay Program | 01/01/70 00:00 | |
| RE: Telephone Tone Generator Delay Program | 01/01/70 00:00 | |
| RE: Telephone Tone Generator Delay Program | 01/01/70 00:00 | |
| RE: Why doing this ?? | 01/01/70 00:00 | |
| RE: Why doing this ?? | 01/01/70 00:00 | |
| Here is what iam trying to Do | 01/01/70 00:00 | |
| RE: Here is what iam trying to Do | 01/01/70 00:00 | |
RE: Here is what iam trying to Do | 01/01/70 00:00 |