Contiguous Concatenation; Virtual Concatenation - Wavetek ANT-20 Operating Manual

ANT-20/ANT-20E
1.3.4.2 Virtual concatenation (VC-4-4v)
Only with option BN 3035/90.92
Standard overhead
POH byte
J1 (ASCII)
B3 (hex)
C2 (hex)
G1 (hex)
F2 (hex)
H4 (hex)
F3 (hex)
K3 (hex)
N1 (hex)
Table S-3
Contents of VC-4-4v POH byte #1
• Static bytes: All except B3, H4
• Overhead sequence m, n, p: All except B3, H4
• Trace Identifier: J1 (length = 16 frames with CRC7 formation)
• Dynamic bytes with PRBS11: F2 (byte)
• Dynamic bytes via DCC/ECC interface (V.11): F2, K3, N1 (byte)
• H4 sequence, switchable, 4 / 48 bytes
Contents of VC-4-4v POH bytes #2 to #4
• Static bytes: All except B3, H4
• All bytes as POH #1, except B3
1.3.5 Generation of pointer actions
1.3.5.1

Contiguous concatenation

Stimulation
AU-4 pointer sequences
See "STM-1 mapping" and "STS-1 mapping" specifications.
Specifications OC-12c/STM-4c
POH #1
"WG HP-TRACE"
Inserted through parity formation
"13" for ATM mapping
"FE" for BULK signal (STM-4)
"01" for BULK (OC-12)
"00"
"00"
"FF"
"00"
"00"
"00"
POH contents
Concatenation Options
POH #2 to #4
"00"
"13" for ATM mapping
"FE" for BULK signal (STM-4)
"01" for BULK (OC-12)
"00"
"00"
"00"
"00"
"00"
S-5