| 摘要 |
<p>PURPOSE:To attain data communication between data processing units by means of the interface of the CCITT recommendations 25 via plural packet switching networks by utilizing network ID, DTE address of a call user data part of CR, CN packets. CONSTITUTION:In receiving a CN packet from a packet switching network, a communication processing means 11 gives a call user data part including a CN packet network ID 24 and a DTE address part (2)25 to a network selection processing means 12. The network selection processing means 12 checks whether the logic channel belonging to the line subscribed to the packet switching network corresponding to the network management table 31 is in use if the network ID 24 on the CN packet and the network IC of the network management table 31 of a communication control information storage section 13 are concident and if not is use, the content of the received DTE address part (2)25 is set to the DTE address part (1)22 to use a logic channel is use for the transmission of the CR packet by the request to the communication processing means 11.</p> |
