Telecommunications system
AssigneeNortel Networks Limited
InventorKeith Caves
Life of this patent
Estimating the term…
Abstract
The use of multiple AAL2 virtual circuits to support narrow band calls with multiple types of narrow band signalling systems leads to inefficient use of bandwidths over an ATM network. The present invention provides a method of transporting narrow band calls of multiple narrow band signalling type between narrow band networks across a single virtual circuit in an ATM network, where for each call connection within a circuit the call connection signalling information includes the narrow band signalling type.
Claims8
A method of transporting multiple narrowband calls between first and second narrowband networks across an ATM network, wherein said multiple calls include at least two calls having different narrowband signalling system types;
- the method comprising:
- forming a virtual circuit;
- forming call connections within said circuit for each of said narrowband calls,
- wherein for each call connection within said circuit, corresponding narrowband signalling system type information is forwarded within a data packet comprising the corresponding narrowband signalling system type.
An apparatus for transporting narrowband calls of different signalling system type between first and second narrow band networks across an ATM network, the apparatus comprising:
- means for forming a virtual circuit;
- means for forming call connections within said circuit for each of said narrowband calls, by forwarding a call connection signalling information data packet comprising a narrowband signalling system type field containing the narrowband signalling system type of said call.
An apparatus for transporting narrowband calls of different signalling system type between first and second narrow band networks across an ATM network, the apparatus comprising:
- means for forming a virtual circuit;
- means for forming call connections within said circuit for each of said narrowband calls, by receiving a call connection data packet comprising a narrowband signalling system type field containing the narrowband signalling system type of said call.
A telecommunications system for transporting narrowband calls of different signalling system type between first and second narrow band networks across an ATM network, the system comprising:
- means for forming a virtual circuit between two interworking functions (IWF);
- means for forming call connections within said circuit for each of said narrowband calls by transferring between said IWFs a call connection data packet comprising a narrowband signalling system type field containing the narrowband signalling system type of said call.
Dependencies are inferred from the claim text.