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參數(shù)資料
| 型號： | L9310 |
| 英文描述： | Line Interface and Line Access Circuit Full-Feature SLIC,Ringing Relay,and Test Access Device |
| 中文描述： | 線路接口和線路接入電路全功能用戶接口，振鈴繼電器，測試接入設(shè)備 |
| 文件頁數(shù)： | 18/60頁 |
| 文件大小： | 1053K |
| 代理商： | L9310 |
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Data Sheet
July 2001
Full-Feature SLIC, Ringing Relay, and Test Access Device
L9310 Line Interface and Line Access Circuit
18
Agere Systems Inc.
State Definitions
(continued)
Secondary Control Mode States
(continued)
Current: Tip to Ring
—VTX
I
A voltage proportional to the ac, plus dc tip to ring dif-
ferential current, tip to ground current, or ring to
ground current appears at the TESTLEV output. Use
this state for dc measurements.
I
Choice is determined by primary control mode table.
I
Differential current is selected by choosing powerup
forward or reverse from the primary control mode
table.
I
Tip to ground or ring to ground current is selected by
first choosing powerup forward or reverse from the
primary mode table, and then choosing tip amp or
ring amp from the primary mode table.
I
TESTSIG input is on.
I
Customer applies ac test tone or V
REF
to select an ac
or dc measurement.
Current: Tip to Ring—VITR
I
A voltage proportional to the ac tip to ring differential
current, tip to ground current, or ring to ground cur-
rents, appears at TESTLEV output. Use this state for
ac measurements.
I
Choice is determined by primary control mode table.
I
Differential current is selected by choosing powerup
forward or reverse from the primary control mode
table.
I
Tip to ground or ring to ground current is selected by
first choosing powerup forward or reverse from the
primary mode table, and then choosing tip amp or
ring amp from the primary mode table.
I
TESTSIG input is on.
I
Customer applies ac test tone or V
REF
to select an ac
or dc measurement.
Reference Voltage
I
A voltage proportional to the internal dc reference
voltage V
REF
appears at the TESTLEV output.
I
TESTSIG input is off.
I
This is the calibration state for voltage measure-
ments.
PPM On
I
The PPMIN input is activated and the PPM signal at
PPMIN is transmitted to tip and ring.
I
Device mode per primary control mode table. Once
PPM is active, transition to the scan, disconnect, or
ring modes in the primary state table will deactivate
PPMIN. Transition to forward battery, reverse battery,
ring amp, or tip amp state will not deactivate PPMIN.
PPM Off/TEST Off
I
The PPMIN input is deactivated and the PPM signal
at PPMIN does not appear at tip and ring.
I
PPMOUT is high impedance.
I
Device mode is per primary control mode table.
I
The TESTSIG input is deactivated.
I
TESTLEV output is high impedance.
I
Device mode is per primary control mode table.
Special States
Thermal Shutdown
I
Not controlled via truth table inputs.
I
This mode is caused by excessive heating of the
device, such as may be encountered in an extended
power cross situation.
I
Upon reaching the thermal shutdown temperature,
the device will enter an all-off mode.
I
Upon cooling, the device will re-enter the state it was
in prior to thermal shutdown.
I
Hysteresis is built in to prevent oscillation. In this
mode, supervision output NSTAT is forced low
(off-hook) regardless of loop status or if the discon-
nect logic state is selected.
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