Title:
【発明の名称】端末装置及び端末装置の制御方法
Document Type and Number:
Japanese Patent JP2712550
Kind Code:
B2
Abstract:
PURPOSE:To attain the transmission even in the B-channel busy state by providing a means detecting the B-channel busy state in a network and sending communication information in a D-channel packet automatically. CONSTITUTION:In the case of B-channel busy state, a B-channel busy state of a line is detected by a D-channel call control circuit 5 and when the busy state is detected, the call control for starting the use of B-channel is finished to apply call control for D-channel packet use start and a packet start signal is outputted to a packet selection circuit 4. In this case, the packet selection circuit 4 outputs a select A signal and a select B signal switching the connection of a selector A2 from the position of a B-channel control circuit 3 to the position of a D-channel packet control circuit 6 and switching a selector B7 from the position of a D-channel call control circuit 5 to the position of the D-channel packet control circuit 6 through the input of the packet start signal. Thus, even in the case of B-channel busy state, a video signal is able to be sent.
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Inventors:
Tanno Hidetoshi
Application Number:
JP12587789A
Publication Date:
February 16, 1998
Filing Date:
May 19, 1989
Export Citation:
Assignee:
Canon Inc
International Classes:
H04N1/00; H04L12/02; H04L29/06; H04L29/08; H04M11/00; H04N1/32; (IPC1-7): H04L29/08; H04L12/02; H04M11/00; H04N1/00; H04N1/32
Domestic Patent References:
| JP63280536A | ||||
| JP2272856A |
Attorney, Agent or Firm:
Toshihiko Watanabe