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To: Ray Jensen who wrote (675)	6/2/1998 8:09:00 AM
From: Frank A. Coluccio	Respond to of 3178

Ray, >screaming for a better way to get wired...< Wow, that's a powerful line. Sounds like the battle cry of a militant group of bandwidth-starved fiber aspirants in the George Gilder Camp, or possibly the infamous HNCN, i.e., the Have-Not Camp of the Nineties. In my lead-in to the referenced article... Message 4667490 ... I actually misrepresented what I intended saying, for some inexplicable reason, using LA instead of Frankfurt or Rome or some other city as one of the end points in the hypothetical call, and I assumed that readers would understand what I was suggesting. In case I was unclear and readers did not adjust to what I meant, let me try it again, this time substituting Rome, Italy in the following sentence, and it may become clearer, since in this case, all roads lead to 60 Hudson Street in NY, and not Rome, as the saying goes: "How does this affect latency, when a call is placed, say, from a Rome ITSP to a UK ITSP subscriber, and it must traverse the Atlantic not once, but twice? Maybe more times, in the case where the sub is at a considerable distance from the UK ITSP's hub location, or in another country altogether? Rome--> 60H (crossing #1) 60H --> UK (crossing #2) Even under ideal conditions, this would begin to take on the delay characteristics of a satellite call, due to the mere propagation delays and transiting latencies in the router and gateway ports. If the London UK ITSP subscriber happened to be in Belfast, say, then it could conceivably make a third and fourth crossing, due to the way routing tables are set up for least cost. But one would hope that the UK ITSP would have defined routes in such an instance to prevent this from happening, as in a nailed up route definition, but I wouldn't bet on it, since this adds to their costs. On traditional POTS 64 kbps connections, or even low-bit-rate-voice alternatives, this multiple backhaul arrangement would be tenable, due to the lower latencies of the deterministic approaches used, although there are some appreciable delays introduced in high compression LBRV algorithms, but negligible in comparison to multi-hop public Internet calls or even private IP multi-hop traversals of the kind suggested here. By the way, are you going to SUPERCOM in Atlanta? Steve Guich had asked me the same question, come to think of it, and shame on me, I never got around to answering him on that one, because I've been trying to carve out the time, but thus far I'm having a hard time shaking loose some obligations. Doesn't look good at this time... [Steve, if you're there, I don't know _yet_. <s>] Regards, Frank Coluccio

To: Ray Jensen who wrote (675)	6/2/1998 8:59:00 AM
From: Frank A. Coluccio	Read Replies (1) \| Respond to of 3178

Ray, All, what do you think of this "IP+ATM WAN Core" press release from Cisco? Curtis B., where do MPLS and Tag now stand with respect to IETF RFC ratification? I may be losing touch (probably have), but I thought these were still in some ways up for comment and review. Regards, Frank Coluccio ============= Cisco Announces IP+ATM WAN Core Solutions to Build Tomorrow's Telecommunications Infrastructure June 2, 1998 SAN JOSE, Calif.-- New WAN Core Switch Leverages Optical Internetworking Capabilities to Further Lower the Cost of Provisioning Broadband Services Cisco Systems, Inc. today introduced the Cisco TGX 8750 optical core switch as part of its comprehensive portfolio of IP+ATM solutions that enable service providers to deliver the high-value services of the future. Cisco's WAN core solutions tightly integrate IP and ATM technologies through Tag Switching, the first implementation of the emerging Multiprotocol Label Switching (MPLS) standard. Tag Switching allows IP services and ATM services to be delivered on a single infrastructure with dynamic bandwidth sharing between services. The TGX 8750 optical core switch is fully MPLS compliant and features hierarchical Private Network to Network Interface (PNNI), SONET/SDH Automatic Protection Switching and OC-48c optical internetworking support. Building up the hierarchical PNNI protocol, the TGX 8750 core ATM network can be scaled to many thousands of switching nodes that support Switched Virtual Circuits (SVCs), soft PVCs and point-to-multipoint VCs. For complete control over voice and data traffic priorities, the switch supports per-VC queueing and allows full network utilization and minimal service degradation using explicit-rate ABR control. All of the PNNI and Tag Switching capabilities are now tightly integrated into Cisco IOS(R) software. Cisco's WAN-core solutions are focused on providing the speeds and resiliency required to meet the high demands of serving the network edge. "Cisco is on a roll," said Ron Jeffries of Jeffries Research. " They've clearly staked out the WAN and will be an aggressive competitor in delivering the QoS-enabled Internet of tomorrow. By offering Cisco IOS software functionality throughout the WAN edge and core, their customers will have end-to-end application support throughout the entire network." The TGX 8750 provides full resilience capabilities. In addition to scaleable and robust routing protocol support (PNNI, OSPF, IS-IS), the TGX 8750 optical core switch provides complete "hot-swappable" redundancy of switch fabrics, processor cards, power supplies and line cards. Line card redundancy of OC-3c, OC-12c, OC-48 and OC-48c ports is supported through SONET 1+1 Automatic Protection Switching, which provides extremely rapid restoration of services. Recently, Cisco announced its five-phase optical internetworking strategy to develop a data-optimized public network with emerging high-capacity, high-speed technologies. The TGX 8750 optical core switch is a continuation of the second phase of the strategy, where Cisco is delivering switches and routers that interface directly to the optical networking layer, avoiding the costs and bandwidth limitations associated with Time Division Multiplexing (TDM). The TGX 8750 supports both channelized OC-48 interfaces and clear channel or concatenated OC-48c interfaces. Cisco designed the TGX 8750 optical core switch to bring OC-48c capability to the core at a price that leads the industry. The TGX optical core switch starts at $60,000 and offers OC-48c ports at $60,000 and OC-48 ports at $45,000. Cisco will field trial the TGX optical core switch later this year and will ship the product beginning in 1999. Cisco's WAN-core solutions fully leverage Cisco IOS software to ensure end-to-end and multivendor network interoperability within carrier ATM networks. In addition, the Cisco Service Management software suite enables end-to-end planning, provisioning, operating and billing for IP+ATM services across a multivendor networking environment. By promoting and implementing industry standards, Cisco is enabling service providers to more rapidly evolve their networks to offer the full set of IP+ATM services. "We designed the TGX optical core switch to deliver OC-48c capability and allow our customers to smoothly scale their networks to terabit speeds," said Morgan Littlewood, director of marketing with Cisco's WAN Business Unit. "For terabit networks to develop quickly, the industry has to provide compelling service propositions, provision vast numbers of customer ports and access systems and then leverage the cost structures of optical internetworking to the fullest extent. Cisco is tackling the whole problem, including the logistical challenges of evolving networks." About Cisco Systems Cisco Systems (NASDAQ: CSCO) is the worldwide leader in networking for the Internet. Cisco news and information are available at cisco.com.