參數(shù)資料
型號: PSF21911
廠商: SIEMENS A G
元件分類: 數(shù)字傳輸電路
英文描述: ISDN Echocancellation Circuit for Terminal Applications IEC-Q TE
中文描述: DATACOM, ISDN ECHO CANCELLER
文件頁數(shù): 60/164頁
文件大?。?/td> 1401K
代理商: PSF21911
PSB 21911
PSF 21911
U-Transceiver
Semiconductor Group
60
11.97
0
1111 0000
CCRC
Corrupt CRC
. This command is only
recognized if the device is set to EOC
transparent mode. The microcontroller should
issue the command in case the MON-0-
command RCC was received before. CCRC
then causes corrupt CRCs to be transmitted
upstream.
Loop-back B1
. The command is only
recognized in EOC transparent mode. The
microcontroller should issue the command in
case the MON-0-command LB1 was received
before. LB1 loops back the B1 channel. The
loop is closed near the IOM-2 interface.
Loop-back B2
. The command is only
recognized in EOC transparent mode. The
microcontroller should issue the command in
case the MON-0-command LB2 was received
before. LB2 loops back the B2 channel. The
loop is closed near the IOM-2 interface.
Loop-back B1 + B2 + D
. The command is used
in the EOC transparent and EOC auto-mode.
LBBD loops back both B-channels and the D-
channel. The loops are closed near the IOM-2
interface. In transparent mode the loop is closed
unconditionally. In auto-mode the loop is closed
only if LBBD was received in the EOC-channel
before.
Return to Normal
. The NORM-command
resets the device into its default mode, i.e. loops
are resolved and corrupted CRCs are stopped.
It is only used in transparent mode.
Read Near-End Block Error Counter
. The
value of the near-end block error counter is
returned and the counter is reset to zero. The
maximum value is FF
H
.
0
1111 0100
LB1
0
1111 0010
LB2
0
1111 0001
LBBD
0
1111 1111
NORM
0
1111 1011
RBEN
Table 13
Mon-8 Local Function Commands
(cont’d)
r
Code
D7-D0 (Bin)
Direction
D
Function
Local Commands
U
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