Common channel interoffice signaling system
US4499336A · kind A · utility
12Cited by
2References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 29, 1982 |
| Grant date | Feb 12, 1985 |
| Priority date | — |
| Expiry date | Oct 29, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q3/0016
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A modular Common Channel Interoffice Signaling (CCIS) system is described for use with an electronic switching office. This system provides for minimal impact to the program instructions of the switching office. Virtually all modifiable CCIS program instructions are contained within the CCIS system. Therefore, any feature changes or additions to the CCIS system affect only the CCIS system and not the switching office. In addition, the central processing arrangement of the present CCIS system operates a large number of analog and/or digital transmission devices for CCIS data transfer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.