| 摘要 |
<p>PURPOSE:To enable a bucket switching apparatus to communicate only having one circuit even though a subscriber terminal having a large number of protocols by selecting a communication control device for processing a protocol from the subscriber terminal after the subscriber terminal protocol is identified by a protocol identification code circuit control device which is included in the connection demand signal. CONSTITUTION:When it is possible for a communication control device 201 to communicate with the subscriber terminal which is provided with a protocol P1 and for a communication control device 202 with a protocol P2, in like manner, for a communication control device 20n it is possible to communicate with its subscriber terminal provided with a protocol Pn, and supposing that, for example, a subscriber terminal 701 sends a connection demand signal from a subscriber line 601 on a basis of protocol P2, a circuit control device 401 selects a communication control device 202 by discriminating a protocol discrimination code and the above terminal 701 will communicate with the communication control device 202 through a circuit control device 401 and data bus 301. Even when each communication control device 201, 202, - 20n will communicate with other subscriber terminals such as 702-70i, circuit 501, 502, the above devices also will operate in the same way.</p> |
