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1) SMDS Interface Protocol
Used
in communications between customer premises equipment (CPE) and Switched
Multimegabit Data Service (SMDS) network equipment, it allows the CPE to use
SMDS service for high-speed WAN internetworking. Based on the IEEE 802.6 DQDB
standard. See also DQDB.
2) Serial Interface Processor
Obsolete interface processor for Cisco 7000 series routers that provided
either two or four channel-independent ports for synchronous serial connections
at speeds from 2.4 Kbps to 4 Mbps. The SIP has been replaced by the FSIP.
Sometimes called SX-SIP or Pre-FSIP. See also
FSIP.
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