Low Cost SONET Framing

• Vendors: PMC, Transwitch, Base2
• 155 Mb/s, 622 Mb/s & 2.4 Gb/s
• Multi-chip solutions available today - $$
• Need low cost, single chip SONET/ATM framer chips for LAN application
• Compatible with wide area, subset of framing overhead supported for LAN
• Globally accepted standard

• line rate 155.52 Mb/s (scrambled)
• frame rate 155.52 Mb/s
• cell data rate 149.76 Mb/s