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參數(shù)資料
| 型號： | T7264 |
| 英文描述： | T7264 U-Interface 2B1Q Transceiver |
| 中文描述： | T7264 U型接口2B1Q收發(fā)器 |
| 文件頁數(shù)： | 18/54頁 |
| 文件大小： | 876K |
| 代理商： | T7264 |
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18
Lucent Technologies Inc.
Data Sheet
April 1998
T7264 U-Interface 2B1Q Transceiver
K2 Interface Description
(continued)
Table 10. UM2 and UM3 Octet—UCS Bits (Functions)
(continued)
Table 11. DS Octet (Overview)—Device Status
Table 12. DS Octet (Functions)—Device Status
Octet
UM3
Bit #
5
Symbol
cso
(DO
LT
/
DI
NT
)
Name/Function
Cold Start Only.
Passed transparently from the K2 to the U-interface at the NT and
from the U to the K2 at the LT.
0—Cold and warm start capability.
1—Cold start only.
Reserved Bits.
Passed transparently from the K2 to the U-interface (DI
LT
) and from
the U to the K2 interface (DO
NT
). Transmit should always set to a 1.
S/T-Interface Activity Indicator.
Passed transparently from the K2 to the U-inter-
face at the NT and from the U to the K2 interface at the LT.
0—No activity at the S/T-interface.
1—Activity (INFO1 or INFO3) at S/T-interface.
U-Interface Only Activation.
Passed transparently from the K2 to the U-interface
at the LT and from the U to the K2 interface at the NT.
0—Request S/T deactivation at the NT.
1—Allow S/T activation at the NT.
Network Indicator Bit.
Passed transparently from the K2 to the U-interface at the
NT and from the U to the K2 interface at the LT. Reserved for network use. Normally
set to 1 in customer premises equipment.
Alarm Indication Bit.
Passed transparently from the K2 to U-interface at the LT
and from the U to the K2 interface at the NT.
0—Failure of intermediate 2B+D transparent element.
1—Transmission path is established between NT and local exchange.
UM3
3, 4,
5
7
R
x, y
(DO
NT
/DI
LT
)
sai
(DI
NT
/
DO
LT
)
UM3
UM3
7
uoa
(DI
LT
/
DO
NT
)
UM3
8
nib
(DI
NT
/
DO
LT
)
aib
(DI
LT
/
DO
NT
)
UM3
8
Octet
Octet #
DO/DI
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
Bit 8
DS
8
DO
nebe
xact
—
1
oof
1
rsksi
1
Octet
DS
Bit #
1
Symbol
nebe
Name/Function
Near-End Block Error.
0—crc error detected in previously received U frame.
1—Normal.
Transceiver Active.
0—Transceiver in reset state.
0 to 1—Detection of a tone or istp = 0.
1—Transceiver active.
1 to 0—On reset, 480 ms after loss of sync or deactivation.
Undefined.
May be either a 1 or a 0.
Reserved.
In normal operation, these bits are 1.
Out of Frame.
0—Out of frame.
1 to 0—Initiates the 480 ms loss of synchronization timer.
1—Normal.
Reflected System-to-K2.
This bit reflects the value of the sksi bit received over the
K2 interface.
DS
2
xact
DS
DS
DS
3
—
—
oof
4, 6, 8
5
DS
7
rsksi
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