TFRA08C13-DB AGERE [Agere Systems], TFRA08C13-DB Datasheet - Page 71

• Manufacturer Part Number: TFRA08C13-DB
• Description: TFRA08C13 OCTAL T1/E1 Framer
• Manufacturer: AGERE [Agere Systems]

Preliminary Data Sheet
October 2000
Lucent Technologies Inc.
Lucent Technologies Inc.
Alarms and Performance Monitoring
Table 29. Sa6 Bit Coding Recognized by the Receive Framer
Table 30 defines the three 4-bit Sa6 codes that are always detected synchronously to the CRC-4 submultiframe
structure, and are only used for counting NT1 events.
Table 30. Sa6 Bit Coding of NT1 Interface Events Recognized by the Receive Framer
The reference points for receive CRC-4, E-bit, and Sa6 decoding are illustrated in Figure 27
Sa6_1
Sa6_2
Sa6_3
Sa6_C
Sa6_8
Sa6_A
Sa6_E
Sa6_F
Code
Code
hex
hex
hex
hex
hex
hex
hex
hex
First Receive Bit
First Receive Bit (MSB)
(MSB)
0
0
0
1
1
1
1
1
0
0
0
0
1
1
Last Received Bit
0
0
1
1
1
(LSB)
(continued)
1
0
1
0
1
0
1
1
Last Received Bit (LSB)
This code will cause both
counters to increment.
CRC-4 Error & E = 0
TFRA08C13 OCTAL T1/E1 Framer
Event at NT1
CRC-4 Error
0
0
0
0
1
E = 0
Counter Size
(bits)
16
16
—
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