JPS6454851A - Exchange with variable setting pad - Google Patents
Exchange with variable setting padInfo
- Publication number
- JPS6454851A JPS6454851A JP21184387A JP21184387A JPS6454851A JP S6454851 A JPS6454851 A JP S6454851A JP 21184387 A JP21184387 A JP 21184387A JP 21184387 A JP21184387 A JP 21184387A JP S6454851 A JPS6454851 A JP S6454851A
- Authority
- JP
- Japan
- Prior art keywords
- damping
- pad
- pads
- damping quantity
- accuracy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Monitoring And Testing Of Exchanges (AREA)
- Interface Circuits In Exchanges (AREA)
Abstract
PURPOSE:To realize the insertion of a required damping quantity to a speech path even when a pad with low setting accuracy is used, by calculating an actual damping quantity from a test signal outputted by a test machine and a returned damping signal, and setting the damping quantities of first and second pads so as to obtain a value nearest to the damping quantity designated in advance. CONSTITUTION:The actual damping quantity is calculated by a control circuit 9 from the test signal SG outputted from the test machine 3 and the damping signal DT in which the test signal SG is returned via the first and second pads 51 and 52 and via an up and a down speech paths, and a calculated damping quantity is set so as to be the value nearest to the damping quantity designated in advance by controlling the first and second pads 51 and 52. In such a way, the accuracy of the damping quantity inserted to a line actually is not related to the setting accuracy of a pad element, thereby it is not required to design and manufacture the pad with high accuracy.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21184387A JPH0659068B2 (en) | 1987-08-25 | 1987-08-25 | Exchanger with variable setting pad |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21184387A JPH0659068B2 (en) | 1987-08-25 | 1987-08-25 | Exchanger with variable setting pad |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6454851A true JPS6454851A (en) | 1989-03-02 |
JPH0659068B2 JPH0659068B2 (en) | 1994-08-03 |
Family
ID=16612506
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21184387A Expired - Lifetime JPH0659068B2 (en) | 1987-08-25 | 1987-08-25 | Exchanger with variable setting pad |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0659068B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02244862A (en) * | 1989-03-17 | 1990-09-28 | Nec Corp | Subscriber line test system |
-
1987
- 1987-08-25 JP JP21184387A patent/JPH0659068B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02244862A (en) * | 1989-03-17 | 1990-09-28 | Nec Corp | Subscriber line test system |
Also Published As
Publication number | Publication date |
---|---|
JPH0659068B2 (en) | 1994-08-03 |
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