Figure 98. Stm-4 Structure And Soh Byte Contents - Alcatel 1850 TSS-320 Technical Handbook

A1 A1 A1 A1 A1 A1 A1 A1 A1 A1 A1 A1 A2 A2 A2 A2 A2 A2 A2 A2 A2 A2 A2 A2 J0 Z0 Z0 Z0
B1
D1
B2
B2 B2 B2 B2 B2 B2 B2
D4
D7
D10
S1
1 261
1 9
#1
AUG
RSOH 1234,1234,.....
1234,1234,1....
MSOH
4 x 9
A1 - A2 Alignment word A1=11110110, A2=00101000. Utilizes all slots of the four STM-1.
J0 Regenerator Section Trace.
Z0 (Spare) These bytes are reserved for future international standardization.
B1 BIP-8 calculation result on the previous frame (after scrambling).
Utilized to assess error rate between regenerators. Uses slot of first STM-1.
E1 For EOW operations between regenerators. Uses slot of first STM-1.
F1 Available for the user (data from SERVICE unit). Uses slot of first STM-1.
D1 ³ D3 Are used for 192 Kbit/s channel for DCC on TMN network. Uses slot of first STM-1.
B2 Result of BIP-Nx24 calculation on previous frame exempt of three RSOH rows.
Used to assess error rate between multiplexers. Uses all slots.
K1 - K2 For 1+1 MS Trail Linear Protection indications and FERF, AIS alarms.
Uses slot of first STM-1.
D4 ³ D12Are used for 576 Kbit/s channel for DCC on TMN network. Uses slot of first STM-1.
S1 Indicates synchronization status (b5³b8) of sync. path status. Uses slot of first STM-1.
E2 For EOW operations between multiplexers. Uses slot of first STM-1.
M1 Indicates section FEBE (STM4). Uses slot of third STM-1.
Notes:
– bytes marked with X are reserved for national use.
– all unmarked bytes are reserved for future international standardization (for media
dependent, additional national use and other purposes).
– bytes marked with ² are not scrambled (like the whole first row).
Technical Handbook Common
Functional Description
36 bytes
E1
D2
AU pointer(s)
B2 B2 B2 B2 K1 K1
D5
D8
D11
M1
1 261
1 9
#2
AUG

Figure 98. STM-4 structure and SOH byte contents

F1
D3
K2
D6
D9
D12
E2
1 261
1 9
#3
AUG
4 x 261
STM-4
Alcatel 1850 TSS-320 Rel. 1.1
8DG 07734 AAAA Edition 01
1 261
1 9
#4
AUG
....1234,1234.
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