| 摘要 |
A network access system (6) has a transfer layer (10) having a gateway agent (20) and interworking agent (21) which interface with short message service centres. Each agent (20, 21) comprises a table which cross-references the external short message service centres with short message entities to which they are connected to allow the agent to be addressable by these entities and to route messages between them and networks. The delivery agent (20) is connected to a gateway switching centre (22) and the interworking agent (21) is connected to an interworking switching centre (23). The switching centres are in a relay layer (11) and carry out lower-level operations in conjunction with the network layer (12). |
