Specification for dual-tone multi-frequency (DTMF) signalling protocol for social alarm systems
BS 8521:2009
Specification for dual-tone multi-frequency (DTMF) signalling protocol for social alarm systems
Buy from us with a 10% discount on standard BSI prices. PDF and printed formats are available.
You can choose which format you require once the item has been added to the shopping cart.
Our Price: £198.00
Normal BSI Price: £220.00
ISBN: 9780580550799
Keywords:
Messages, Control functions, Alarm systems, Information transfer, Telephone signalling equipment, Acoustic signals, Warning devices, Digital signals, Data transmission, Special-purpose alarms, Codes, Telephone networks, PDF
| Publication Date | 30 Apr 2009 |
|---|
| Product SKU | 30129608 |
|---|
| ISBN | 9780580550799 |
|---|
| BSI Code | BS 8521:2009 |
|---|
| No. of pages | 30 |
|---|
| Replaces | BS 7369:1991 |
|---|
| Publisher | British Standards Institution |
|---|
