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): 22/54頁
文件大?。?/td> 876K
代理商: T7264
22
Lucent Technologies Inc.
Data Sheet
April 1998
T7264 U-Interface 2B1Q Transceiver
U-Interface Description
(continued)
Table 17. U-Interface Bit Assignment
* LT(NT). Values in parentheses () indicate meaning at the NT.
K2 Functional Description
The K2 interface provides the mechanism for transferring data and control information between the system and the
T7264. A K2 frame consists of eight DO octets and eight DI octets which occur every 125
μ
s (every frame sync).
Figure 14 shows the K2 frame structure.
TIME (125
μ
s)
5-5173
Figure 14. K2 Octet Description
Figure 15 shows the points of origination and destination of bits on the K2 and U-interfaces at the LT and NT.
5-5174
Figure 15. K2 Functional Description
Bit #
Frame #
1
2
3
4
5
6
7
8
1—18
Sync
ISW
SW
SW
SW
SW
SW
SW
SW
19—234
12(2B+D)
2B+D
2B+D
2B+D
2B+D
2B+D
2B+D
2B+D
2B+D
235
M1
eoc
a1
eoc
dm
eoc
i3
eoc
i6
eoc
a1
eoc
dm
eoc
i3
eoc
i6
236
M2
eoc
a2
eoc
i1
eoc
i4
eoc
i7
eoc
a2
eoc
i1
eoc
i4
eoc
i7
237
M3
eoc
a3
eoc
i2
eoc
i5
eoc
i8
eoc
a3
eoc
i2
eoc
i5
eoc
i8
238
M4
act
239
M5
R
1, 5
R
2, 5
crc
1
crc
3
crc
5
crc
7
crc
9
crc
11
240
M6
R
1, 6
febe
crc
2
crc
4
crc
6
crc
8
crc
10
crc
12
dea (ps
1
)*
R
3, 4
(ps
2
)*
R
4, 4
(ntm)*
R
5, 4
(cso)*
R
6, 4
uoa (sai)*
aib (nib)*
DI
DO
B1
B2
D
UM1
UM2
UM3
DC
S1
B1
B2
D
UM1
UM2
UM3
DS
1s
S1
DF
eoc
UCS
T7264
LT
T7264
NT
B1/B2/D - R(6)
UM1, 2 - eoc(12)
UM2, 3 - ps1, act, febe,
ps2, ntm, cso, sai, nib
DF - RSF, RF, TSF, TF
DS - nebe, xact, wstrt, oof
UM2, 3 - adea, act, rfebe, uoa, nib
UM1, 2 - eoc(12)
B1/B2/D - R(9)
DC - ccrc, afrst, istp,
lpbk, xpcy, ldea
DF - RSF, RF, TSF, TF
DS - nebe, xact, wstrt, oof
DC - ccrc, afrst, istp,
lpbk, xpcy, ldea
B1/B2/D - R(6)
UM1, 2 - eoc(12)
UM2, 3 - ps1, act, rfebe,
ps2, ntm, cso, sai, nib
2B1Q
2-WIRE
U-
INTERFACE
K2
K2
DI
DO
DO
DI
UM2, 3 - dea, act, febe, uoa, aib
UM1, 2 - eoc (12)
B1/B2/D - R (9)
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