Expert Knowledgebase
Emerging Wireless Technologies (including VoIP) with Carrie Higbie
Are there lightning protection blocks for data circuits?
(21 JUN 2004)
We need to connect several buildings that are within a couple of hundred feet max. We could save money by purchasing one 24-port switch and providing service from the first building, however we need to include...
Which wires need to be "crossed" in order to make a crossover cable?
(21 JUN 2004)
Which wires need to be "crossed" in order to make a crossover cable?
Is there a way I can relay my changing IP to my Web site so I can view it from there?
(21 JUN 2004)
I have a dynamic public IP and have a ftp server inside my LAN, the major annoyance comes when my IP changes quite frequently might I add, and I have no way of getting my new IP from the net. Is there a way I c...
Remote office users complain that characters don't immediately appear on the screen when they type on the document that is stored on the server back at corporate headquarters. What could be the problem?
(21 JUN 2004)
We are considering consolidating multiple remote office servers to a few shared corporate servers back here at headquarters. This means that remote users will access their Word and Excel documents over the fra...
Can I use CAT5e instead of plain CAT5? Are they interchangeable?
(21 JUN 2004)
Can I use CAT5e instead of plain CAT5? Are they interchangeable?
Does any one keep track of non-standard terminology?
(21 JUN 2004)
Does any one keep track of non-standard terminology? In the group that I worked with developing a Linux (Actually Non Proprietary UNIX Emulator NPUE (pronounced New-pooie)) 64, 128 and 256 bit compilers we us...
Why do ordinary modems only support up to 56 kbps whereas DSL working on same infrastructure provides very fast Internet access?
(21 JUN 2004)
Why do ordinary modems only support up to 56 kbps whereas DSL working on same infrastructure provides very fast Internet access? What is the reason?
Can you tell me who the vendors are for CAT 7 bulk cabling 1000 meters rolls?
(21 JUN 2004)
Can you tell me who the vendors are for CAT 7 bulk cabling 1000 meters rolls? And what are the differences between GG45 and Tera. I am planning for a Gig network. Thanks.
Can you recommend a programming assessment document that deals with the options of migrating from an existing traditional PBX environment to VoIP?
(21 JUN 2004)
Can you recommend a programming assessment document that deals with the options of migrating from an existing traditional PBX environment (300 users) to VoIP?
I have read that WiMax is going to revolutionize network access for companies and residences. What's your opinion?
(21 JUN 2004)
I have read that WiMax is going to revolutionize network access for companies and residences. What's your opinion?
Is it possible to access a computer residing in an ADSL network?
(21 JUN 2004)
Is it possible to access a computer residing in an ADSL network? That's because such a network has an ADSL router hiding the LAN computers IPs. Then it is not possible even to ping a computer residing in an ADS...
I'm looking for a good network tool (Web-based if possible) that uses ICMP to ping and trace route all nodes (Voice Gateways and IP Phones) live - what can you recommend?
(21 JUN 2004)
We're currently looking for a good network tool (Web-based if possible) that uses ICMP to ping and trace route all nodes (Voice Gateways and IP Phones) live, allow us to view what nodes are up and what nodes ar...
What is maximum distance to a hub or any device and what are the maximum PCs for a network?
(21 JUN 2004)
What is maximum distance to a hub or any device and what are the maximum PCs for a network?
Could you provide me with details on coaxial cable, fiber optic cable and twisted pair cable?
(21 JUN 2004)
Could you provide me with details on coaxial cable, fiber optic cable and twisted pair cable? I'm looking for information on transmission rates, price, usable length, ease of installation, security and resistan...
Ethernet throughput
(21 JUN 2004)
I have question about Ethernet. I manage a Network for a development company and we have one subnet with roughly 115 PC's and Servers. What would be the actual throughput one should be getting within a internal...
Could you compare SONET versus Frame Relay with ATM networks.
(21 JUN 2004)
Could you compare SONET versus Frame Relay with ATM networks.
Which is better if you have to choose -- DSL or cable?
(21 JUN 2004)
Which is better if you have to choose -- DSL or cable?
Is it possible to send two different Internet connections through the same media converter and same fiber optic cable?
(21 JUN 2004)
Is it possible to send two different Internet connections through the same media converter and same fiber optic cable?
Could you explain how calling cards are implemented?
(21 JUN 2004)
Could you explain how calling cards are implemented? What is the architecture -- should they use Cisco VoIP or any other technology. Can you send me any information?
We just upgraded our cable to CAT5. I am looking to work with D Link unmanaged switches. Are these as good as any other switches?
(21 JUN 2004)
I have a network backbone of 10/100 switches and a router / firewall that is 10/100. An Apple consultant told us we needed to upgrade our network. I pulled and replaced the cat 3 patch cables with 5 E and excha...
VoIP references and certifications
(21 JUN 2004)
Could you offer me some good references and certifications on VoIP?
Are all four pairs of wires used in a 100BaseT CAT5 environment?
(21 JUN 2004)
Are all four pairs of wires used in a 100BaseT CAT5 environment? In other words -- can you use only two pairs to get the full 100BaseT advantage?
What are shielded systems and how are the different from UTP systems?
(21 JUN 2004)
I am hearing a lot about shielded systems, what are they and how are they different than UTP systems. What is the difference between Class E and Class F?
How does Differentiated Service Code Point (DSCP) in IPv6 contribute to Quality of Service in IP networks?
(21 JUN 2004)
Can you enlighten me about type of service in IPv4 and Differentiated Service Code Point (DSCP) in IPv6 as to what extend they contribute to Quality of Service in IP networks and how they contribute to the Diff...
What is an enterprise network?
(21 JUN 2004)
What is an enterprise network? Can you please refer to some relevant links if possible?
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