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Technology Stocks : Ascend Communications (ASND) -- Ignore unavailable to you. Want to Upgrade?

To: The Phoenix who wrote (51881)	8/11/1998 1:55:00 AM
From: bucky89	Read Replies (1) \| Respond to of 61433

>An emerging class of high-speed IP switches >can read the beginning and end of packets at >line speeds, a capability that will go a long >way toward enabling QoS in IP environments. your remarks Gary: >What does speed of an IP >switch have to do with it's ability to discern packet types? I mean, yes, certainly >processor speed is fundamental but what does this have to do with trunk speed? I think the author is talking about the ability of high-speed IP switches to quickly determine the length of each oncoming IP packet. This is indeed one of the major hurdles in providing IP QoS. The TOS byte is easy to read and use, as opposed to determining packet length is where much of the work is at. Once you do this, you can sort the packets out into different queues by packet length. That way you can prevent long packets from blocking shorter, time-sensitive packets. This is a very processor-intensive task, and becomes even more difficult when packets rush at you at OC-48 or OC-192 speeds. You have to come up with special router h/w architectures to distribute the processing load among multiple processors. I'm sure there are lots of other technical issues that I'm not familiar with. ATM circumvents this work by cutting all data up into nice 48-byte chunks for easier processing and prioritizing. In the process you add a lot of cell headers and with fragmentation end up with a cell tax of about 20-25%. bucky89

To: The Phoenix who wrote (51881)	8/11/1998 2:14:00 AM
From: bucky89	Respond to of 61433

We have to use ATM to do QoS right now, but in the long run ATM will probably disappear." That ATM will probably disappear is true, but it's kind of like saying gasoline as a fuel will probably disappear, to be replaced by fusion. It will happen some time in the next 100 years, but hard to say exactly when. It may be premature to start divesting holdings in oil stocks. Yes, there are lots of drawbacks to using gasoline, but the replacement technology isn't ready yet. For that reason, we will continue to use fossil fuels. And telco's will use ATM. So hold on to your Ascend. bucky89

To: The Phoenix who wrote (51881)	8/11/1998 2:20:00 AM
From: Bindusagar Reddy	Read Replies (1) \| Respond to of 61433

Gary, did you read the second article, that is written by a different writer and they talk about Carriers in general and how old ones and new ones differ in their technologies of choice. Especially Williams using GX550 direct connection to the network eliminating unnecessary equipments and saving 50-70% cost reduction.And how old carriers are deploying ATM to relieve congestion, quite interesting. Please read the second one and see what you think. Afterall the future may lie between the two, consisting of multiservice networks, nothing in its purity. They are in the process of combining the ATM+IP in one, which might be the future. One thing is sure Communications will never be the same and CSCOs and ASNDs and others will make a lot of money in next 10 years. I will call the next decade a COMMUNICATION DECADE. 90s was a COMPUTING DECADE produced big winners in PC space. Next 10 years you will see unprecedented changes which will surprise everyone including the companies themselves. Future looks bright for everyone who is trying to revolutionize the communications. MAKE IT RELIABLE AND AFFORDABLE for everyone on this planet. Next 12 months will tell the story. Unfortunately ASND may be bought out, in that case it will be difficult to predict what they would achieve if they were independent. Good luck Gary, How many options do you have from CSCO as engineer. BR