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  • Publicado : 14 de febrero de 2012
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Alcatel-Lucent 7705 SAR

The Alcatel-Lucent 7705 Service Aggregation Router (SAR) portfolio delivers industry-leading IP/MPLS and pseudowire capabilities in compact platforms with the ability to reliably groom and aggregate multiple media, service and transport protocols onto an economical packet transport infrastructure.Alcatel-Lucent 7705 SAR-F

The Alcatel-Lucent 7705 SAR portfolio is optimized for multiservice adaptation, aggregation and routing, especially onto a modern Ethernet and IP/MPLS infrastructure. Leveraging the powerful Service Router Operating System (SR OS) and 5620 Service Aware Manager (SAM), it is available in compact, low power consumption platforms delivering highly available services overresilient and flexible network topologies. The 7705 SAR is well suited to the aggregation and backhaul of 2G, 3G and LTE mobile traffic — providing costeffective scaling and the transformation to IP/MPLS networking. Business services modernization is supported in the transition from legacy to consolidated, packet-based operation. Hugely reduced equipment footprints are achievable with reduced energycosts. Enterprise and vertical organizations (such as energy utilities, transportation and government agencies) can deploy with confidence, achieving reliable and resilient support of legacy and advanced services. The Alcatel-Lucent 7705 SAR owes much of its development heritage to the Alcatel-Lucent Service Router (SR) product line. Sharing much of the

Alcatel-Lucent 7705 SAR-8

market-leadingfeature set of that product line, the Alcatel-Lucent 7705 SAR brings a powerful, service-oriented capability to the RAN, specifically in form factors and at-price points that are particularly appropriate for cell sites and hub locations in addition to denser points of concentration. With end-to-end service management under the Alcatel-Lucent 5620 management portfolio, the Alcatel-Lucent 7705 SARgreatly augments the IP/MPLS RAN transport solution from Alcatel-Lucent.

Service aggregation and networking
To provide the most efficient transport solution, the Alcatel-Lucent 7705 SAR can employ pseudowire encapsulation methods to map services end to end. The use of pseudowires ensures that the key attributes of the service are maintained, while using a cost-effective packet environment toaggregate services. In addition to pseudowire transport, IP routing and forwarding and Virtual Private LAN Service (VPLS) are supported. Services such as Asynchronous Transfer Mode (ATM), inverse multiplexing over ATM (IMA), Ethernet and TDM traffic can be natively switched across the 7705 SAR.

Alcatel-Lucent 7705 SAR-18

The Alcatel-Lucent 7705 SAR supports RFC 5086 — Structure-Aware TDMCircuit Emulation Service over Packet Switched Network (CESoPSN) and also RFC 4553 — Structure-Agnostic TDM over Packet (SAToP) for the encapsulation and transport of TDM traffic; for example, from mobile 2G, TDM-attached base stations. The use of circuit emulation service (CES) ensures that only the active time slots are transported, keeping bandwidth usage to a minimum. Also, the Alcatel-Lucent 7705SAR supports RFC 4717 — Encapsulation Methods for Transport of ATM over MPLS networks; N:1 cell mode is supported. Multiple access ATM ports are bundled together to attain higher speeds using IMA. The IMA protocol is terminated on the Alcatel-Lucent 7705 SAR, and only the cells containing user data that belong to a virtual circuit/virtual path (VC/VP) structure are transported. RFC 4448 —Encapsulation Methods for Transport of Ethernet over MPLS Networks is also supported. To offer greater scalability, all the traffic out of an Ethernet port can be carried over a single Ethernet pseudowire or, alternatively, a pseudowire can be created for each VLAN that is assigned to a different service or end customer. IP pseudowires are supported and provide the ability to deterministically carry IP...