psf21911 ETC-unknow, psf21911 Datasheet - Page 60

• Manufacturer Part Number: psf21911
• Description: Isdn Echocancellation Circuit Terminal Applications Iec-q
• Manufacturer: ETC-unknow

Semiconductor Group
Table 13
r
0
0
0
0
0
0
Code
D7-D0 (Bin) D
1111 0000
1111 0100
1111 0010
1111 0001
1111 1111
1111 1011
Mon-8 Local Function Commands (cont’d)
Direction
U
LB1
LB2
LBBD
NORM
RBEN
CCRC
Function
Local Commands
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
60
H
.
U-Transceiver
PSB 21911
PSF 21911
11.97