Figure 100. Stm-64 Structure And Soh Byte Contents - Alcatel 1850 TSS-320 Technical Handbook

A1 A1 A1 A1
B1
D1
B2 B2 B2 B2
D4
D7
D10
S1
1 261
1 9
#1
AUG
RSOH
12...64,12...64,..
MSOH
64 x 9
A1-A2 Alignment word A1=11110110, A2=00101000. Utilizes all slots.
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 except of three RSOH rows.
Used to assess error rate between multiplexers. Uses all slots.
K1 - K2 For APS 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 synchronism status. Uses slot of first STM-1.
E2 For EOW operations between multiplexers. Uses slot of first STM-1.
M1 Indicates section FEBE (STM-64). 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
dipendent, additional national use and other purposes)
– bytes marked with S are not scrambled (like the whole first row)
Technical Handbook Common
Functional Description
576 bytes
A1 A1 A2 A2 A2
E1
D2
B2 B2 K1 K1
D5
D8
D11
M1
1
1 9
#2
AUG
123.....6364,123.....6364,.....

Figure 100. STM-64 structure and SOH byte contents

A2 A2 A2 J0
F1
D3
AU pointer(s)
K2
D6
D9
D12
E2
261 1
1 9
#3
AUG
64 x 261
STM-64
8DG 07734 AAAA Edition 01
Z0
261 1
1 9
#64
AUG
123.....6364,123.....6364.
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