IBM3009K2672
IBM SONET/SDH Framer
- Debounced K3 byte plus New K3 indication.
- G1 path REI (Path FEBE) plus Path RDI.
- M1 Line REI (Line FEBE) and Line RDI.
• The SONET/SDH framer will not lose data input on its transmit ring port interface if the frequency of its
transmit ring port clock input signal is 20 ppm from nominal and its transmit line clock is 20 ppm from
nominal. This also applies to the receive side. That is, if the receive line frequency is different from the
RXRINGCLK frequency, then no data will be lost going from the receive side of the SONET/SDH framer
over to its receive ring port interface.
Ring Port Data Format
Start sequence
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
ADDRESS
DATA
4
14 consecutive 0’s
4
3
2
1
0
8
7
6
5
3
2
1
0
Address Field Bit Definitions indicates the meaning of the bits in the address field while the five figures that
follow it indicate the formats of the nine-bit data field. The data fields contain information relating only to their
corresponding STM-1/STM-4/STM-4c/STS-3c/STS-12/STS-12c.
Address Field Bit Definitions
Address Field
4
3
2
1
0
DATA_SEL
section no.
0
0
0
0
1
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
X
Data field contains New APS Indication and Debounced K2 Byte.
Data field contains New K3 Indication and Debounced K3 Byte.
Data field contains Line RDI and Line FEBE.
Data field contains Path FEBE and Path RDI.
Data field contains a reserved bit and Debounced K1 Byte.
Not Used.
Not Used.
0
0
1
1
0
1
0
1
Data Field is associated with STM-1/STS-3c #1.
Data Field is associated with STM-1/STS-3c #2.
Data Field is associated with STM-1/STS-3c #3.
Data Field is associated with STM-1/STS-3c #4.
Data Field is Carrying Debounced K1 Byte and a Reserved Bit
Reserved
Debounced K1 Byte
8
7
6
5
4
3
2
1
0
MSB
LSB
ssframer.01
8/27/99
Operation
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