DJLXT6282LE.A3 Intel, DJLXT6282LE.A3 Datasheet - Page 19

• Manufacturer Part Number: DJLXT6282LE.A3
• Manufacturer: Intel

Specifications of DJLXT6282LE.A3

• Lead Free Status / RoHS Status: Not Compliant

Datasheet
SMF I
SMF II
NOTES:
RE: Remote End CRC-4 Block Error indicator bits (REBE)
Sa4-Sa8: Spare bits for national use
C1-C4: CRC-4 Bits
A: Remote Alarm Indication
F: NFAS Framing Bit (normally = 1 to avoid spurious frame sync)
Table 2. Multiframe TimeSlot 0 Signaling Description
The multiframe consists of 16 basic E1 frames (eight double frames), numbered 0-15, that are
further divided into two 8-frame sub-multiframes (SMF I and SMF II). Bit 1 of each frame is used
to transport the Cyclic Redundancy Check bits, multiframe sync word and Remote End Block
Errors (REBE) in the following manner:
After FAS/NFAS frame synchronization is acquired, the CRC-4 multiframe alignment is declared
when two correct CRC-4 MultiFrame Alignment signals are detected within 8 ms (one complete
multiframe lasts two ms). If CRC-4 multiframe alignment is not achieved within 8 ms after frame
alignment, a new search will be initiated for valid FAS/NFAS.
Once the CRC-4 Multiframe is acquired, a Loss Of CRC-4 Multiframe (LOMF) is declared when
the frame synchronization is lost, or the CRC-4 error rate is greater or equal to 915 block/s. The
Loss Of CRC-4 Multiframe alarm is accessible to the microprocessor via the status registers.
•
•
In the four frames of each SMF that include the FAS word, bit 1 contains the four CRC bits,
numbered C1-C4.
In the eight frames of the entire multiframe that include the NFAS word, bit 1 contains a 6-bit
CRC-4 multiframe alignment signal as well as two REBE indication bits.
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Frame #
Frame #
C1
0
C2
0
C3
1
C4
0
C1
1
C2
1
C3
RE1
C4
RE2
1
1
0
F
0
F
0
F
0
F
0
F
0
F
0
F
0
F
2
2
0
A
0
A
0
A
0
A
0
A
0
A
0
A
0
A
3
3
1
Sa4
1
Sa4
1
Sa4
1
Sa4
1
Sa4
1
Sa4
1
Sa4
1
Sa4
4
4
1
Sa5
1
Sa5
1
Sa5
1
Sa5
1
Sa5
1
Sa5
1
Sa5
1
Sa5
5
5
0
Sa6
0
Sa6
0
Sa6
0
Sa6
0
Sa6
0
Sa6
0
Sa6
0
Sa6
6
6
1
Sa7
1
Sa7
1
Sa7
1
Sa7
1
Sa7
1
Sa7
1
Sa7
1
Sa7
7
7
LXT6282
1
Sa8
1
Sa8
1
Sa8
1
Sa8
1
Sa8
1
Sa8
1
Sa8
1
Sa8
8
8
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