| 摘要 |
<p>A method of signalling in a telecommunications network to control a set of circuit switched channels between a network exchange (3, 9) and an Internet Access Server (NAS, 7). Signalling data is transmitted between the exchange (3, 9) and a gateway node (11) using SS7 protocol, the exchange (3, 9) and the gateway node (11) being assigned respective SS7 Point Codes. The signalling data is then transmitted between the IAS (7) and the gateway node (11) using Internet Protocol (IP), the gateway node (11) and the IAS (7) being assigned respective IP addresses. The gateway node (11) is provided with a look-up table mapping the IAS IP address to the exchange Point Code and a set of identifiers corresponding to said set of channels. Signalling data received at the gateway node (11) from the exchange (3, 9) is routed to the IAS (7) using the IP address for the IAS (7) obtained from the look-up table using the Point Code of the source exchange (3, 9) and a channel identifier conveyed with the signalling data.</p> |
