Direct access arrangement device
US7835516B2 · kind B2 · utility
1Cited by
9References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 29, 2005 |
| Grant date | Nov 16, 2010 |
| Priority date | — |
| Expiry date | Sep 16, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M11/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A direct access arrangement (DAA) device configured to interface a security alarm modem with a phone network. The DAA device comprises a receive optical isolator (OI) module and first and second transmit OI modules. The transmit OI modules are joined in parallel with one another to receive signals from the security alarm modem and convey the signals to the phone network. The receive IO and first and second transmit OI modules may each be interconnected to at least partially cancel distortion generated by the first and second transmit IO modules.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.