| ??? 02/14/03 09:30 Read: times |
#39046 - RE: 8051 Telephone Exchange Responding to: ???'s previous message |
Years ago, I designed such a system (Z80 based) 2 trunk lines and 8 extentions. My SLIC was a simple 2 or 3 transistors circuit and one relay for ringing.
If you wish, I can help you regarding the design. |
| Topic | Author | Date |
| 8051 Telephone Exchange | 01/01/70 00:00 | |
| RE: 8051 Telephone Exchange | 01/01/70 00:00 | |
| RE: 8051 Telephone Exchange | 01/01/70 00:00 | |
| RE: 8051 Telephone Exchange | 01/01/70 00:00 | |
| RE: 8051 Telephone Exchange | 01/01/70 00:00 | |
| RE: 8051 Telephone Exchange | 01/01/70 00:00 | |
| RE: AUTOMATED TELEPHONE SERVICE | 01/01/70 00:00 | |
| for IJAZ AHMED | 01/01/70 00:00 | |
| RE: for IJAZ AHMED | 01/01/70 00:00 | |
| Thankyou, IJAZ for willing to help me | 01/01/70 00:00 | |
| Building Telephone exchanges | 01/01/70 00:00 | |
| RE: Building Telephone exchanges | 01/01/70 00:00 | |
| Ijaz did you get your document | 01/01/70 00:00 | |
| RE: Ijaz did you get your document | 01/01/70 00:00 | |
RE: 8051 Telephone Exchange | 01/01/70 00:00 |