T9000
Preliminary Data Sheet
November 2000
ISDN Network Termination Node (NTN) Device
7 Transmission Superblock (continued)
7.6 DFAC Register Set (continued)
Table 24. UCR0: U-Interface Control Register #0 (0x07)
Reg
R/W
Bit 7
Bit 6
PS1
DEA
1
Bit 5
Bit 4
SAI
UOA
0
Bit 3
Bit 2
F_ACTUP
F_ACTDN
0
Bit 1
ACTUP
ACTDN
0
Bit 0
UCR0
R/W
NTM_n
PS2
XPCY
ISTP
RESET
Default
1
1
0
0
Bit #
Symbol
Name/Description
7
NTM_n
NT Test Mode. Controls upstream U-interface overhead bit NTM.
0: NTM = 0, Indicates the NT is in test mode.
1: NTM = 1, Normal operation.
6
5
PS1
DEA
Power Status 1. Controls upstream U-interface overhead bit PS1. (See PS2 below.)
Deactivate. When the T9000 device is put in LT mode (DOCR[NT_LT] = 1), this bit becomes the DEA
(turn-off) bit.
Power Status 2. Controls upstream U-interface overhead bit PS2. According to ETSI ETR 080, PS1 and
PS2 indicate the NT power status as follows:
PS2
PS1 PS2 Power Status
0
0
1
1
0
1
0
1
Dying gasp.
Primary power out.
Secondary power out.
All power normal.
S/T-Interface Activity Indicator Control. Controls upstream U-interface overhead bit SAI. According to
ETSI ETR 080, the SAI bit is set to 1 to indicate to the network that there is activity (INFO 1 or INFO 3) at
the S/T reference point. Otherwise, it is set to 0.
4
SAI
0: SAI follows activity on S/T-interface per ETR 080.
1: Forces SAI = 1 on the U-interface.
U-Interface Only Activation. When the T9000 device is put in LT mode (DOCR[NT_LT] = 1), this bit
becomes the UOA (U-only-activation) bit. This bit needs to be set to 1 to allow S/T activation at the NT.
UOA
Force U-Block Upstream Data Transparency. Asserts U-block XPCY bit, forcing U-block upstream 2B+D
data transparency.
3
2
XPCY
0: No effect on device operation.
1: Forces U-block data transparency.
Force U-Interface Upstream ACT Bit. Normally, the state of the upstream ACT bit tracks the received
INFO3 state on the S-interface. However, in cases where there is no TE attached, this bit allows manual
control of the upstream ACT bit (via the ACTUP bit, below).
F_ACTUP
0: ACT bit follows INFO 3.
1: ACT bit follows ACTUP bit (see ACTUP below).
Force U-Interface Downstream ACT Bit. When the T9000 device is put in LT mode (DOCR[NT_LT] = 1),
this bit controls the downstream ACT bit (via the ACTDN bit, described below).
F_ACTDN
ACTUP
0: Downstream ACT bit is zero.
1: Forces the value of ACTDN bit (described below) to be transferred downstream.
1
ACT Upstream. Only valid when F_ACTUP bit is set (see F_ACTUP above). It controls the state of the
upstream U-interface ACT bit.
0: Forces upstream ACT bit = 0.
1: Forces upstream ACT bit = 1.
ACT Downstream Bit. When the T9000 device is put in LT mode (DOCR[NT_LT] = 1), this bit controls the
state of the downstream U-interface ACT bit.
ACTDN
0: Forces downstream ACT bit = 0.
1: Forces downstream ACT bit = 1.
Lucent Technologies Inc.
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