Lucent Technologies DDM-2000 OC-3, User & Service Manual

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363-206-285
Administration and Provisioning
8-8 Issue 3 June 2001
Multiplexing and Mapping 8
Table 8-1 contains a summary of DDM-2000 OC-3 multiplexing and mapping
capabilities.
Table 8-1. DDM-2000 OC-3 Multiplexing and Mapping Capabilities (Note)
The following paragraphs describe the multiplexing and mapping capabilities
provided by the system. Note that it is possible to mix the multiplexing and
mapping options within an OC-3 or OC-12 signal on an STS-1 basis. For
example, one STS-1 of an OC-3 or OC-12 interface may carry DS1s in a
VT1.5-structured STS-1, and another may carry a DS3 signal.
DS1 to OC-1/OC-3/OC-12 8
The DDM-2000 OC-3 Multiplexer uses the floating VT mode, asynchronous
mapping for clear channel DS1 transport. Each DS1 signal is mapped to a VT1.5
signal; four VT1.5s are byte-interleaved to form a VT-G signal; and seven VT-Gs
are byte-interleaved to form a VT-structured STS-1 signal. The STS-1 signals are
byte-interleaved to create STS-3 and STS-12 signals respectively.
In the opposite direction, a received OC-1, OC-3, or OC-12 is converted back to
an electrical signal and, for OC-3 and OC-12, demultiplexed to STS-1 signals.
Interface
Cross-
Connect
Type
Interface
DS1 DS3 EC-1 OC-1 OC-3 OC-12
OC-12 VT1.5 X — X X X X
STS-1 X X X X X X
STS-3c — — — — — X
OC-3 VT1.5 X — X X X
STS-1 X X X X X
OC-1 VT1.5 X — X X
STS-1 X X X X
EC-1 VT1.5 X — X
DS3 VT1.5 — —
STS-1 — X
DS1 VT1.5 X
Note:
“X” indicates supported.
”—” indicates not supported.