HP StorageWorks 2/24 FW 07.00.00/HAFM SW 08.06.00 McDATA Products in a SAN Env - Page 197
Digital Signal 3 DS3
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Implementing SAN Internetworking Solutions 4 • Digital Signal 1 (DS1) - A framing and formatting specification that transmits 24 digital data channels on a T1 synchronous line. Each channel transmits at 64 Kbps (full-duplex), providing an aggregate bandwidth of 1.544 Mbps. Typical T1 lines are long-distance, point-to-point connections used for private networks and corporate Internet communication. The iFCP protocol overhead for a clear-channel (private) T1 link is 4.4%, which provides a bandwidth of 1.48 Mbps (0.18 MBps) for storage traffic. • Thin Ethernet - A transmission medium specified by IEEE 802.3 that carries information at 10 Mbps (full-duplex) in baseband form using low-cost (50-ohm type RG58) coaxial cable. The specification was developed to enable communication of LAN-connected computers. Thin Ethernet is also called 10 Base-T. The iFCP protocol overhead for a thin Ethernet link is 6.3%, which provides a bandwidth of 9.37 Mbps (1.17 MBps) for storage traffic. • Digital Signal 3 (DS3) - A framing and formatting specification that transmits 672 digital data channels on a T3 synchronous line. Each channel transmits at 64 Kbps (full-duplex), providing an aggregate bandwidth of 44.736 Mbps. Typical T3 lines are long-distance, point-to-point connections used by ISPs connecting to the Internet backbone and for the backbone itself. - The iFCP protocol overhead for a clear-channel (private) T3 link is 5.1%, which provides a bandwidth of 42.48 Mbps (5.31 MBps) for storage traffic. - The iFCP protocol overhead for an asynchronous transfer mode (ATM) DS3 link is 22.7%, which provides a bandwidth of 34.59 Mbps (4.32 MBps) for storage traffic. • Optical Container 1 (OC-1) - A specification that defines the transport level for SONET traffic transmitted at 51.84 Mbps (full-duplex) using fiber-optic cable. - The iFCP protocol overhead for a packet over SONET (PoS) OC-1 link is 8.9%, which provides a bandwidth of 47.22 Mbps (5.90 MBps) for storage traffic. - The iFCP protocol overhead for an ATM OC-1 link is 17.9%, which provides a bandwidth of 42.58 Mbps (5.32 MBps) for storage traffic. Implementing SAN Internetworking Solutions 4-53