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T7264 Datasheet(PDF) 20 Page - Agere Systems

Part # T7264
Description  T7264 U-Interface 2B1Q Transceiver
PDF  54 Pages
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Manufacturer  AGERE [Agere Systems]
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T7264 Datasheet(HTML) 20 Page - Agere Systems

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20
Lucent Technologies Inc.
Data Sheet
April 1998
T7264 U-Interface 2B1Q Transceiver
K2 Interface Description (continued)
K2 Bit Levels
Table 15. K2 Data Out (DO) Bit Levels
(+) Active = 1
(T) Transparent
(–) Active = 0
(P) Pulsing
Table 16. K2 Device Control (DC) Bit Levels
(+) Active = 1
(x) Either 1 or 0
(–) Active = 0
Bit Name
Description
True Level
Reset/Idle
Operational
U-Interface Related
B1, B2
ISDN 64 kbits/s B1, B2 Octet
1
T
D
ISDN 16 kbits/s D Bits
1
T
RSF, TSF
Receive/Transmit Superframe
+
1
P
RF, TF
Receive/Transmit Frame
+
1
P
UM Bits
eoc
eoc addr, d/m, and info bits
+
1
T
act
Activate
+
0
1
dea
Deactivate
–
1
1
ps1, ps2
Primary/Sec. Power Status
+
1
1
febe
Far-end Block Error
–
1
1
ntm
NT in Test Mode
–
1
1
cso
Cold Start Only
+
1
0 or 1
sai
S/T Activity Indicator
+
1
1
uoa
U Only Activation
–
1
1
nib
Network Indicator Bit
–
1
1
aib
Alarm Indication Bit
–
1
1
R
Reserved
–
1
1
DS Bits
nebe
Near-end Bit Error
–
1
1
xact
Transceiver Active
+
0
1
oof
Out of Frame
–
0
1
Bit Name
Description
True Level
Reset/Idle
Operational
ccrc
Corrupt the Outgoing crc
–
x
1
istp
Initiate Start-up
–
1
0 then x
lpbk
Loopback
–
1
1
afrst
Reset
+
1 then x
0
ldea
Local Deactivate
+
1 then x
0
xpcy
Transparency
–
1
0



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