PEB 24911 H V1.3 Lantiq, PEB 24911 H V1.3 Datasheet - Page 110

• Manufacturer Part Number: PEB 24911 H V1.3
• Manufacturer: Lantiq

Specifications of PEB 24911 H V1.3

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Far End Errors - Summary:
- Definition
A far-end block error (FEBE) indicates errors that occurred in the transmit direction, i.e.
an detected error during transmission from LT to NT. A far-end block error is detected
when the U-maintenance bit “FEBE” is set to zero.
- Indications
Each detected FEBE will cause the FEBE-counter to be incremented (maximum count
is FF
- Read Out and Reset
The counter value may be read out by the MON-8-command RBEF
C0 … C7:8-bit counter value
Each read operation resets the FEBE-counter to 00
states except the following ones:
- Line Active
- Pend. Transparent
- Transparent
- S/T Deactivated
The following section illustrates how block error counters are tested.
4.4.3.2
Figure 40
Transmission errors are simulated with artificially corrupted CRCs. With two commands
the cyclic redundancy checksum can be inverted. A third command offers the possibility
to invert single FEBE-bits.
• MON-8 CCRC causes the DFE-Q V2.1 to permanently transmit inverted CRCs.
Data Sheet
MON-8
1
MON-8
1
With CCRC issued on LT-side, near-end block errors will be observed at the NT and
far-end errors are noticed at the LT.
H
0
0
, no overflow)
0
0
Testing Block Error Counters
illustrates how near- and far-end block error counters can be tested.
0
0
0
0
RBEF
ABEN
0
0
0
0
0
0
100
Read Block Errors Far-end
1
Answer Block Errors Far-end
C7 C6 C5 C4 C3 C2 C1 C0
1
H
. The counter is also reset in all
1
Operational Description
1
1
0
PEF 24911
2001-07-16
1
0