Ask the Experts
Ask the Experts
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Comparing and contrasting enterprise 2.0 and web 2.0 within the context of unified communications
Web 2.0 and Enterprise 2.0 both deal with the state of maturity of the Web as an information delivery system, although in varying degrees. Learn more about the "2.0 mentality" in this expert response. Continue Reading
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What can a VoIP phone do that a landline phone cannot?
This expert response outlines the basic differences between a VoIP phone and a POTS phone. Continue Reading
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What is the difference between B2BUA and proxy in SIP protocol?
Find out the differences between a B2BUA like Asterisk, and a proxy when installed in a SIP protocol. Continue Reading
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What is the difference between analog phone equipment and an IP phone?
SearchVoIP.com expert Carrie Higbie answers a user submitted question about the differences between analog and IP phone systems. Continue Reading
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What is the difference between a VoIP client and an IMS client?
SearchVoIP.com expert Carrie Higbie answers a user submitted question about the differences between VoIP and IMS clients. Continue Reading
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What is an E&M line? What is the difference between a 2 wire and 4 wire E&M?
What is an E&M line? What is the difference between a 2 wire and 4 wire E&M? Continue Reading
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Why is UDP used more in VoIP than TCP?
If UDP is unreliable, why is it used more in VoIP rather than TCP? Continue Reading
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What is the difference between VoIP, CTI and IP telephony?
What is the difference between VoIP, CTI (Computer Telephony Integration) and IP telephony? Continue Reading
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Does Spanning Tree Protocol have an adverse effect on VoIP?
Do you know if Spanning Tree has an adverse effect upon VoIP? If so, what is the best way to provide LAN-based switch redundancy to VoIP gateways? Continue Reading
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What is the difference between VoIP and VoFR?
What is the difference between VoIP and VoFR? Continue Reading
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How do we fix 'echo', 'static' and background noise on our new VoIP system?
Our organization has just implemented a VoIP system on 40 - 50 test phones. However, our users have been complaining of echo, static and amplified background noise during phone usage. The noise can only be heard on our end. Can you please give some... Continue Reading
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How to set up a simple VoIP network on an existing LAN
Setting up a VoIP network on an existing LAN requires some IP PBX familiarity. Learn how to implement your new VoIP network with this expert response. Continue Reading
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What is the difference between a SIP-enabled phone and an IP phone that is not SIP-enabled?
Learn about the differences in programming a SIP-enabled phone versus a phone that is not SIP enabled, and the costs and benefits of each. Continue Reading
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What is the difference between ground start signaling and loop start signaling?
Learn about the fundamental differences between ground start signaling and loop start signaling in this expert response. Continue Reading
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Difference between IP PBX and VoIP box
What is the difference between an IP PBX and VoIP box? Continue Reading
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Cisco tools vs. Prognosis
What network management IP telephony vendors do a good job with Cisco Unified Call Managers? What are the pros and cons of using Integrated Research's Prognosis vs. Cisco's own tools? Continue Reading
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What kind of compression is used in VoIP?
Our voice expert explains what kind of compression is used in VoIP, in this expert response. Continue Reading
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What is the difference between an analog and a digital PBX?
Expert Juan Pablo Pazos compares an analog PBX versus an IP PBX to a reader wondering whether or not PBXes were replaced more than twenty years ago by digital PBXes. Continue Reading
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How does a computer on the network get its IP address?
How does a computer on the network get its IP address? Continue Reading
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How does an ATA work?
How does an ATA work? Continue Reading
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What are the advantages and disadvantages of MPLS?
Learn the advantages and disadvantages of MPLS in this expert response from our telecommunications expert. Continue Reading
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ISDN, MPLS and VSAT
We have a centralized database online system with hub and spoke network architecture. On top of this, we have our own VPN setup. Our users either connect through VSAT or dedicated leased lines for accessing our system with ISDN as a last mile backup... Continue Reading
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How many calls can a T1 handle and what is bandwidth of each call?
Our site member is planning a VoIP implementation at his company. He asked, "How many simultaneous calls can be handled by a T1 and what is the bandwidth for each call?" Get the expert answer here. Continue Reading
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Can VoIP and firewalls work together for the greater security good?
To allow VoIP to pass through the firewall, ports have to be left open. Can you point out some ways to help VoIP and firewalls work together for the greater security good? Continue Reading
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Hardware and software required to set up basic VoIP service
Get details and resources to find the hardware and software you will need to set up VoIP at your company. This basic overview offers information on IP/PBXs, SIP equipment, IP phones, Softphones and E911. Continue Reading
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Codecs demystified
Learn more about the codec used by Skype and how it differs from other codecs in this expert answer. Patrick Ferriter explains Skype protocol, Global IP Sound, iLBC codec, GIPS, iSAC codec and SIP protocols here. Continue Reading
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Music on-hold (MoH) in the SIP world
Find out more about music on-hold (MoH) capabilities and SIP enabled audio streams in this expert answer. Continue Reading
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Nice Logger explained
Learn what Nice Logger is and what types of telephony cards it supports in this expert answer. Continue Reading
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What is tromboning?
In this expert reply, Patrick Ferriter explains what tromboning means in VoIP. Continue Reading
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Highest acceptable latency to attempt a VoIP call over
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Understanding customer acceptance
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DHCP lease renewal on IP phones
Learn how to handle DHCP lease renewal on IP phones in this expert response. Continue Reading
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Comparing IP with ATM networks
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Difference between data communications and IP based solution
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Toll-free call failure
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ADSL bandwidth
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How do satellite ATM networks work?
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Difference between gateway and router
Learn the difference between a gateway and a router in this Ask the Expert response. Continue Reading
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Risk factors for migration to IP telephony
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What exactly is SIP and what are its advantages and disadvantages?
Learn about the advantages and disadvantages of choosing SIP over H.323 or another VoIP traffic carrier. Continue Reading
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We want to use VoIP over the LAN without PBX hardware. Any suggestions?
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VoIP gateways and SS7
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What causes one-way conversation in a VoIP network?
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What is the difference between H.248 and H.323? And what are the differences between ATM and FR tech
Learn the difference between H.248 and H.323 and also what the differences are between ATM and frame relay (FR) technology. Continue Reading
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What is FXO and FXS?
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I'm confused about the term "IP Centrex." Can you explain?
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What is the difference between gateways and gatekeepers?
Learn what the difference is between a network gateway and a gatekeeper in this Ask the Expert response. Continue Reading
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What is the difference between Cisco call manager and Cisco SIP Proxy server?