參數(shù)資料
型號: T9000
英文描述: ISDN Network Termination Node (NTN) Device
中文描述: ISDN網(wǎng)絡(luò)終端節(jié)點(新界北)設(shè)備
文件頁數(shù): 37/126頁
文件大小: 2127K
代理商: T9000
Lucent Technologies Inc.
37
Preliminary Data Sheet
November 2000
ISDN Network Termination Node (NTN) Device
T9000
7 Transmission Superblock
(continued)
7.6 DFAC Register Set
(continued)
Table 26. USR0: U-Interface Status Register #0 (0x09)
Table 27. USR1: U-Interface Status Register #1 (0x0A)
Reg
USR0
RESET
R/W
R
Default
Bit 7
AIB_n
1
Bit 6
FEBE_n
1
Bit 5
NEBE_n
1
Bit 4
UOA_n
1
Bit 3
DEA_n
1
Bit 2
OOF_n
0
Bit 1
XACT
0
Bit 0
ACTDN
0
Bit #
7
6
Symbol
AIB_n
FEBE_n
Name/Description
Alarm Indication Bit.
Filtered (3x) version of downstream U-interface overhead bit AIB.
Far-End Block Error.
Indicates whether a CRC error was detected in the most recent
U-interface received superframe at the far end.
0: CRC error in most recent far-end U superframe.
1: No CRC error detected at far end.
Near-End Block Error.
Indicates whether a CRC error was detected in the most recent
U-interface received superframe.
5
NEBE_n
0: CRC error in most recent received U superframe.
1: No CRC error detected in most recent received U superframe.
U-Interface Only Activation.
Filtered (3x) version of downstream U-interface overhead bit
UOA.
Deactivation Indication Bit.
Filtered (2x) version of downstream U-interface overhead bit
DEA.
Out of Frame.
Indicates whether synchronization has been achieved on the U-interface.
4
UOA_n
3
DEA_n
2
OOF_n
0: U-interface out of frame.
1: U-interface is synchronized (SWs and ISWs are being properly detected).
U-Transceiver Active.
0: Transceiver is IDLE. No start-up requests are active. U block is in a low-power mode,
and line driver is in a high-impedance power-saving mode.
1: Transceiver starting up or active.
Downstream Activation Bit.
Filtered (3x) version of downstream U-interface overhead bit
ACT.
1
XACT
0
ACTDN
Reg
USR1
RESET
R/W
R
Default
Bit 7
Bit 6
R64R
1
Bit 5
R54R
1
Bit 4
R44R
1
Bit 3
R34R
1
Bit 2
R25R
1
Bit 1
R16R
1
Bit 0
R15R
1
Bit #
7
6—3
Symbol
Name/Description
Reserved.
R[6:3]4R
Receive U Bits.
Filtered (3x) version of downstream U-interface overhead bits R64, R54,
R44, and R34.
Receive U Bit.
Filtered (3x) version of downstream U-interface overhead bit R25.
Receive U Bits.
Filtered (3x) version of downstream U-interface overhead bits R16 and
R15.
2
R25R
R[16:15]R
1—0
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