參數(shù)資料
型號: TP3420AV
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 數(shù)字傳輸電路
英文描述: ISDN S/T Interface Device
中文描述: DATACOM, DIGITAL SLIC, PQCC20
封裝: PLASTIC, LCC-20
文件頁數(shù): 20/32頁
文件大?。?/td> 524K
代理商: TP3420AV
Functional Description
(Continued)
TABLE 8. Codes for SC1, SC2 and Q Channel Messages with 3X Checking Enabled
NT-to-TE
TE-to-NT
SCI Messages
Received at TE
Number of
Repetitions
before MFR1 INT
3
1
Received at NT
Number of
Repetitions
before MFR1 INT
3
1
S11
0
1
S12
0
1
S13
0
1
S14
0
1
Q1
1
0
Q2
1
0
Q3
1
0
Q4
1
0
Idle (NORMAL)
LP Loss-of-Power
Indication
STP Self Test Pass
STF Self Test Fail
ST Self Test Request
(Note 15)
STI Self Test Indication
FECV Far End Code
Violation
DOI Disruptive Operation
Indication
DTSE-IN
DTSE-OUT
DTSE-IN&OUT
Loopbacks
LB1 Request
LB1 Indication
LB2 Request
LB2 Indication
LB1/2 Request
(Note 16)
LB1/2 Indication
Loss-of-Received-
Signal
Indication
Unassigned
0
0
0
0
1
0
0
1
3
3
0
0
0
1
3
0
1
1
1
1
1
1
0
3
1
0
0
1
1
3
1
0
1
0
1
1
0
0
0
0
0
0
1
1
1
1
1
1
0
0
1
1
1
3
3
0
1
1
1
3
3
3
1
0
0
0
1
1
1
1
1
0
0
1
3
1
0
1
0
3
All Other Codes
Received at TE
1
All Other Codes
1
Number of
Repetitions
before MFR2 INT
S21
S22
All Codes
S23
S24
All SC2 Messages
3
Note 15:
The code “0001” will be received by an NT1 when ST Request and any other code (except LP) is sent simultaneously by two or more TEs on a Passive
Bus.
Note 16:
The code “0011” will be received by an NT1 when the LB1 and LB2 requests are transmitted by two different TEs (NT2s) on a Passive Bus.
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