Button telephone set

Abstract

Abstract PURPOSE:To prevent collision of data, by transmitting data signals to a data bus with a specific time slot determined based on the number of itself by taking a synchronizing signal as the reference. CONSTITUTION:The number of itself set with a self-number set switch 8 is read in, and if the value is a main telephone set KTO being a specific value, an internal timer is started and a synchronizing signal with a prescribed period is transmitted to a data bus DT via a data transmission/reception circuit 3, and a data transmission/ reception cycle is obtained. A control section 5 of the KTO transmits the synchronizing signal and the head information signal on the data bus DT. Each telephone set control section other than the KTO receives the synchronizing singla and enters the data transmission/reception cycle.

Inventors

• 👤 Michio Mito
• 👤 Shinji Ishii
• 👤 Kazuyuki Yamamoto
• 👤 Teruyuki Kubo
• 👤 Koichi Sekiguchi
• 👤 Seiya Uchida

Bibliographic Details