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To: Frank A. Coluccio who wrote (22953)	2/21/1999 2:02:00 PM
From: Mr.Fun	Read Replies (1) \| Respond to of 77400

Thanks Frank, I make a special effort to read your posts, as there is always a wealth of insight. As for DLCs, next generation DLC plans I have seen from several equipment vendors move them away from simple voice aggregation to intelligent multi-service devices. So today's DLC becomes tomorrow's DSLAM/RAC/DLC. This is why Cisco would be interested. Ascend was heavily into this architecture view - one of their plans for the Stratus products would take data calls off the network directly from a DLC, first to a RAC, later incorporating RAC technology directly to the "DLC". It will be interesting to see whether this has any impact on LU's AnyMedia DLC or the next-gen 5ESS (which is currently slated to have a livingston rac integrated). I think in another 5 years, you will be giving your new hires more than just a horse pill in photonics. Lost in the excitement over the capacity stretching properties of DWDM is the opportunity presented by the protocol independence of the individual channels. Carriers live and die by service differentiation - and in the future if even one customer wants something different, and it can be provided profitably, you can bet that a carrier will find a way to provision it. Even Level 3 has bought ATM gear and circuit switches to meet customer needs. DWDM and optical cross-connects ought to make it easier to provision more targeted service bundles for increasingly distinct customers. In any case, we are in full agreement about the opportunities available to vendors that can make this mess work together and manage services across multiple applications and technologies.

To: Frank A. Coluccio who wrote (22953)	2/21/1999 2:14:00 PM
From: MMW	Read Replies (1) \| Respond to of 77400

" ps - I just read jach's reply to you while editing, and his was my first take also, but I think I know where you were coming from there, in that the DLC can also be used as a breakout for services other than voice. A la 303? Correct?" My understanding of DLC is that it is a DS0 channel concentrator between customers and COs. We normally define that DS0 is a voice channel since it carries 64khz bandwidth. In reality, it can carries 64Khz any data and voice. It is majority people accessing internet today through a modem. There are two characters of DLC: 1) it is circuit switching, 2) for each channel, it has only 64Khz worth of bandwidth. For voice over IP application, I think this is a place to change, for example, ADSL. This is what I thought Mr. Fun means. Cheers! Mike

To: Frank A. Coluccio who wrote (22953)	2/21/1999 3:34:00 PM
From: Curtis E. Bemis	Read Replies (1) \| Respond to of 77400

Frank-- Two times is sufficient for an invitation ;-)) I enjoy your informative posts on the many threads we cross on. The wonders of the cyber-world. I have a hard time keeping up with you!! ..edge routing, while I was trying to lure my cyber-mentor Curtis into a debate! OK, I'm getting sucked in-- Here are a few of my views on what is happening in the BIG net. ISPs are changing to meet the needs of the customers that they serve. The customers require secure connections and that invokes firewalls; customers require security, authentication, encryption and all that--that invokes the whole suite of things in what is called IPSEC, and the RFC's that describe it. Virtual Private Networks, VPN's, which can be constructed using tunnels (GRE tunnels), are required and all the quality kinds of issues that go with all the above. Packet classification to allow all of these things to happen is important and all of this is done at the edge. Throw VOIP in there ;-). So, if this is what you mean by taking the current intelligence out of the core, then I agree--BUT--the intelligence requirements in the core have changed--not getting stupid--just changing. The core needs bandwidth--the edge gets more complex. The final end customer of an ISP is currently bandwidth limited and fancy quality things have to be invoked to allow that customer to choose the groomed traffic that will flow to them. Tis getting better on the bandwidth front with competition--take NYC as an example. You have some cool bypass folks in operation there--MFNX, LVLT and more. Heck, I remember when a intra-LATA DS1 costs 10K/month. You can get a DS3 from that now, maybe even an OC-3c. Europe is bandwidth deprived by PTNs but I see changes happening. So, is that enough for a debate or questions ?? I got suckered ;-))