Digital tandem channel unit interface for telecommunications network
US5327433A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 30, 1991 |
| Grant date | Jul 5, 1994 |
| Priority date | — |
| Expiry date | Aug 30, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/244
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A digital tandem channel unit installable in an intermediate central office of a digital carrier telephone network maintains the digital format of the T1 traffic in the course of a DS0 tandem cross-connect, so as to eliminates the possibility of corruption of voice/data traffic, as may occur in a conventional `analog` office cross-connect tandem pair due to quantization errors introduced into the data stream in the course of the digital to analog conversion of the data. Also, the invention incorporates control software in each tandem channel unit's micro-controller that allows it to respond to analog tone signalling test procedures initiated from either two or four-wire channel ports of network access equipment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.