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參數(shù)資料
| 型號： | T9000 |
| 廠商： | Lineage Power |
| 英文描述： | ISDN Network Termination Node (NTN) Device(ISDN網(wǎng)絡終端節(jié)點器件) |
| 中文描述： | ISDN網(wǎng)絡終端節(jié)點（新界西）設備（ISDN網(wǎng)網(wǎng)絡終端節(jié)點器件） |
| 文件頁數(shù)： | 36/126頁 |
| 文件大?。?/td> | 1523K |
| 代理商： | T9000 |
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36
Lucent Technologies Inc.
Advance Data Sheet
April 2000
ISDN Network Termination Node (NTN) Device
T9000
7 Transmission Superblock
(continued)
7.6 DFAC Register Set
(continued)
Table 24.
UCR0: U-Interface Control Register #0 (0x07)
(continued)
Table 25. UCR1: U-Interface Control Register #1 (0x08)
Bit #
Symbol
Name/Description
0
ISTP
Initiate Start-Up.
Setting this bit to 1 initiates a start-up sequence on the U-interface. After the activation
attempt, this bit is internally cleared to 0, automatically.
0: No effect on device operation.
1: Attempt one U activation.
Reg
UCR1
RESET
R/W
R/W
Default
Bit 7
R64T
1
Bit 6
R25T
1
Bit 5
R16T
1
Bit 4
R15T
1
Bit 3
Bit 2
ULLBK
0
Bit 1
Bit 0
USSP_E
0
ULBKMUX
0
USPMAG
0
Bit #
7
6
5—4
3
Symbol
R64T
R25T
R[16:15]T
ULBKMUX
Name/Description
Transmit Reserved Bit.
Controls upstream U-interface overhead bit R64.
Transmit Reserved Bit.
Controls upstream U-interface overhead bit R25.
Transmit Reserved Bits.
Controls upstream U-interface overhead bits R16 and R15.
U-Interface Local Loopback MUX.
Controls the point at which the U-interface local
loopback takes place when the ULLBK bit (see below) is asserted.
0: U local loopback occurs at the line interface (line must be disconnected during this
operation).
1: U local loopback occurs at the interface between the digital and analog section
of the U block. Line need not be disconnected during this operation.
U-Interface Local Loopback.
Controls loopback of U-interface data stream at either the
line interface or the digital-to-analog boundary in the U block, depending on the ULBK-
MUX bit (see above). ULLBK turns off the echo canceller and reconfigures the receive
scrambler to match the transmit scrambler. If ULBKMUX = 0, the line should be discon-
nected prior to asserting ULLBK. This ensures that a sufficiently large echo is generated
so that the device can detect the echo as received data and synchronize to it.
2
ULLBK
0: No effect on device operation.
1: U-interface local loopback.
U Single Pulse Magnitude.
Controls the
magnitude of the pulse transmitted on the
U-interface when the device is in the U send single pulse test mode (see below).
1
USPMAG
0: Transmit ±3 pulses.
1: Transmit ±1 pulses.
U Send Single Pulse Enable.
Test mode that causes the U-interface to continuously
transmit single 2B1Q pulses on the U-interface. The pulses occur at a rate of 1 pulse per
125
μ
s and alternate between positive and negative polarity. The magnitude of the
pulses is controlled by USPMAG (see above).
0
USSP_E
0: No effect on device operation.
1: Send single pulses on the U-interface.
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