Overhead bytes
Function
Processing
H4
Provides a general
multiframe indicator for
VC-structured payloads.
Provides a maltiframe and
sequence indicator for
virtual VC-3 concatenation
and LCAS
Fixed to 11111111
K3 (bit 1 to 4)
VC-4 APS path
Fixed to 0
K3 (bit 5 to 6)
Reserved
Fixed to 0
Z5
Network control
Fixed to 0
The next table describes the POH processing for VC-4 transmission.
Overhead bytes
Function
Processing
J1
VC4 trace identifier
Yes
B3
BIP-8 path
Yes
C2
Path signal label
Yes
G1
REI/RDI path
Yes
F2
User channel
Fixed to 0
F3
User channel
Fixed to 0
H4
Provides a general multiframe
indicator for VC-structured
payloads. Provides a maltiframe
and sequence indicator for virtual
VC-4 concatenation and LCAS
Yes
K3 (bit 1 to 4)
VC-4 APS path
Fixed to 0
K3 (bit 5 to 6)
Reserved
Fixed to 0
Z5
Network control
Fixed to 0
Note: The ISDN feature requires the processing of the overhead contained in timeslot 0
(TS0) of the 2 Mbit/s signal.
Power supply specifications
•
The power consumption of a fully equipped Metropolis
®
AMU 2m/4o system
remains below 160 watts.
•
The power consumption of a fully equipped Metropolis
®
AMU 1m/1o system
remains below 55 watts.
•
The system optionally supports the grounding philosophy according to ETSI
Requirements 300 253, January 1995 (battery return connected to ground).
Product description
System specifications
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2-44
Lucent Technologies - Proprietary
See notice on first page
365-312-847R4.0
Issue 4, November 2006