H - Electricity – 04 – M
Patent
H - Electricity
04
M
H04M 11/00 (2006.01) H04L 12/52 (2006.01) H04M 3/24 (2006.01) H04Q 11/04 (2006.01)
Patent
CA 2058286
A maintenance link is established according to a LAPD between the first and the second terminal units on a path through which subscribers' packet informa- tion is transmitted. In the first and the second terminal units, the first and the second communication state control means for having control for ensuring the consistency of the communication state between the two terminal units are provided by sending/receiving the communication state control information using the maintenance link.
Hatano Takashi
Koga Hisashi
Morita Sumie
Shiomitsu Tsutomu
Takano Ryouzi
Fetherstonhaugh & Co.
Fujitsu Limited
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