Cisco 15454-DS3XM-12

The ONS 15454 SONET 12 port DS-3 card provides 12 GR-499 CORE DS-3 C-Bit or M2/3 framed interfaces, which operate at 44.736 Mbps. The DS3XM-12 demultiplexes a channelized DS-3 into 28 DS-1s, maps the DS-1s to a VT1.5, then multiplexes the 28 VT1.5s into a VT-mapped STS-1.