1 - PRELIMINARY INFORMATION
Fig. 1.3
Bytes reserved for
X
national usage
Byte
A1,A2
J0
D1...D12
E1,E2
F1
B1
B2
K1,K2
Z1,Z2
S1
M1
X
M
-
1-14
Details of section bytes inside the OH
1
2
3
1
A1
A1
A1
2
B1
M
M
3
D1
M
M
4
5
B2
B2
B2
6
D4
7
D7
8
D10
9
S1
Z1
Z1
M
Frame alignment word
Path trace identifier
Data channels for network management (DCC
Audio channels for service communications
User service
Bytes used for bit error detection in a regenerator section
Bytes used for bit error detection in a multiplex section
Bytes used for the switching procedure in a multiplex section
For future use
Byte for the management of the synchronism quality
Byte FEBE (Far End Block Error)
6 bytes reserved for national usage
6 bytes available only in RSOH, for applications that depend on the physical
means (media specific bytes)
The remaining 26 bytes are available for future standardization
4
5
6
A2
A2
A2
J0
E1
M
F1
D2
M
D3
POINTER AU
K1
K2
D5
D6
D8
D9
D11
D12
Z2
Z2
M1
E2
Bytes reserved for
media specific usage
Associated functions
SRA 4 - 6/7/8/10/11/13 GHz (WB ODU) - UMN
7
8
9
X
X
RSOH
X
X
MSOH
X
X
Bytes reserved for
future standardization
, DCC
)
M
R
911-381/02C0000 - Issue 3, July 2004