Method and apparatus for signaling over packet-based systems
US6404782B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1998 |
| Grant date | Jun 11, 2002 |
| Priority date | — |
| Expiry date | Sep 21, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5671
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Signaling information is communicated over an ATM link or other packet-based communication link using packet headers. The information may be, for example, telephony signaling information such as an on-hook/off-hook indicator, a ring/no-ring indicator, or any other type of information used in establishing, maintaining, terminating or otherwise configuring a telephony-based communication. In an illustrative embodiment, a single bit of signaling information is incorporated into a low order bit of a packet type indicator field in a header of an ATM user data cell. This low order bit, which is generally used as an End of Message (EOM) indicator in a cell which is part of a multi-cell message, can be used to transmit the signaling information in packets corresponding to single-cell messages. For example, out-bound telephony signaling information may be received from a telephony device such as a telephone or a computer modem, incorporated into an ATM cell header of a single-cell voice sample message, transmitted over an ATM link, removed from the header in an ATM processing device, and delivered to a public switched telephone network. In-bound telephony signaling information may be receiv…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.