Title:
ANALOGUE TELEPHONE SIGNAL MEASUREMENT DEVICE
Document Type and Number:
Japanese Patent JPH0738645
Kind Code:
A
Abstract:
PURPOSE: To provide a device which analyzes the analog telephone traffic in real time. CONSTITUTION: This device can have various states and is provided with the processors that can test the characteristic of every state. The 1st state 40, 2nd state 41, 3rd state 42 and 4th state 43 are equivalent to a stress state, a call state, a dial state and a talk state respectively. The state 40 jumps to the state 41 in response to detection of a call signal 50 and jumps to the state 43 in response to detection of an off-hook signal 52 of a telephone receiver, and also a system stays in the state 41 in response to a call signal 51. Then the state 40 jumps to the state 42 in response to a busy signal 53 and then jumps to the state 43 in response to a bill pulse signal 55. Meanwhile, the system stays in the state 42 in response to a dial pulse signal 54 and is reset in the state 40 in response to an absence call signal 58. Then the states 42 and 43 are reset to the state 40 in response to detection of the off-hook signals 57 and 56 of the telephone receiver.
Inventors:
BAN BUREDA RODEUITSUKU MARIA
Application Number:
JP17466794A
Publication Date:
February 07, 1995
Filing Date:
June 23, 1994
Export Citation:
Assignee:
NEDERLAND PTT
International Classes:
H04M3/22; H04M3/36; H04Q1/30; (IPC1-7): H04M3/36
Domestic Patent References:
| JPS642457A | 1989-01-06 | |||
| JPS53120461A | 1978-10-20 | |||
| JPS61224696A | 1986-10-06 |
Attorney, Agent or Firm:
Takehiko Saito
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