Method for tandem detection and tandem tunneling
US6498796B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 1999 |
| Grant date | Dec 24, 2002 |
| Priority date | — |
| Expiry date | Oct 18, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2212/00
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus of detecting a tandem link and performing tandem tunneling when a tandem link is detected. The detection of a tandem link includes generating a HAIL and ACK signal where a voice compression unit on one end of the link receives the signals and generates an ACK signal for a voice compression unit on the other end of the link when the HAIL signal is detected. The tandem tunneling prevents the VCUs that comprise the tandem link from decompressing packets received on a network link, adds HDLC header information to the packet to generate HDLC framed packets on the subscriber side, removes HDLC header information from HDLC framed packets received on the subscriber side, and passes the unframed packets to the network side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.