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DATA SHEET
CISCO ONS 15454 SONET 12-PORT DS-3 TRANSMULTIPLEXER CARD
The Cisco
®
ONS 15454 SONET 12-Port DS-3 Transmultiplexer Card provides a cost-effective, high-density DS-3 interface
solution for hand-offs between interexchange carriers (IXCs) and incumbent carriers as well as a channelized interface
for router WAN connectivity.
PRODUCT OVERVIEW
The Cisco ONS 15454 SONET 12-Port DS-3 Transmultiplexer Card (Figure 1) provides 12 Telcordia-compliant, GR-499-CORE DS-3 C-Bit
or M2/3 framed interfaces operating at 44.736 Mbps. The card demultiplexes a channelized DS-3 into 28 DS-1s, maps each DS-1 to a VT1.5,
then multiplexes the 28 VT1.5s into a VT-mapped STS-1 before hand-off to the Cisco ONS 15454 cross-connect card. The integration of
transmultiplexing capabilities into the Cisco ONS 15454 Multiservice Provisioning Platform (MSPP) reduces the need for outboard M13
multiplexers or wideband digital cross-connect systems to access and groom DS-1 signals from channelized DS-3 interfaces. The 12-port DS-3
transmultiplexer card offers grooming flexibility by supporting two ways to receive the DS-3 signal, ported or portless. Ported terminations
refer to DS-3 interfaces that are received through 75-ohm coaxial cables from the shelf assembly’s electrical interface adapter (EIA) panels.
Portless termination is a channelized DS-3 signal received over an STS-1 circuit from a SONET optical line (OC-n). The portless capability
eliminates the need to terminate a channelized DS-3 signal on the shelf assembly and then re-insert.
Figure 1
Cisco ONS 15454 SONET 12-Port DS-3 Transmultiplexer Card