The Cisco 7600 SIP-400 helps enable high-performance, intelligent wide- and metropolitan-area network (WAN/MAN) services. Enterprises and service providers can take full advantage of the increased scalability, performance, and rich features offered by the Cisco 7600 SIP-400, along with the many options for WAN aggregation and connectivity offered in the SPA/SIP portfolio. The Cisco 7600 SIP-400 accepts up to four Cisco SPAs, including GE, OC-48 ATM, OC-12 ATM, OC-3 ATM, OC-12 Packet over SONET/SDH (POS), and OC3 POS, for MAN & WAN connectivity.