What VoIP certifications does a system administrator need?
Can setting up a VPN help you get around blocked VoIP ports?
Is a server necessary to use an IP phone?
Are there options, other than VoIP, hybrid or a traditional PBX, for enterprise-level communications
Softphones in a unified communications (UC) strategy? Who are UC market leaders?
What is the difference between unified communications and unified messaging?
Is there a simple ROI calculator for IP PBX deployment? Where can I find a download of it?
What is an E&M line? What is the difference between a 2 wire and 4 wire E&M?
What is a short description of the difference between a gatekeeper and a gateway?
Is there an Asterisk SS7 solution available?
What is needed to use Voice over WLAN with a 3Com NBX 100?
Is it possible to develop VoIP in Java for use on the LAN without using a PBX or a phone?
What considerations do I need to make when setting up a VoIP system to our remote office?
Can Caller ID on VoIP calls be customized?
How can click-to-dial (click-to-call) be enabled at remote offices?
Why is UDP used more in VoIP than TCP?
How do you select a communications partner?
What are the differences between Asterisk and Brekeke?
Why do VoIP calls remain active after the phone call is ended?
What is the difference between VoIP, CTI and IP telephony?
Can VoIP work on a GPRS-enabled mobile phone?
When should a VoIP system be analyzed and with what tools?
Is IP Centrex legal?
Can Asterisk be used only as an IVR?
How can a small business achieve high quality VoIP?
How is average repair time determined for both a TDM PBX and a VoIP system?
How can VoIP be integrated into an existing PBX system?
How does the cellular phone company charge for IP-based calls?
How does the service provider differentiate between data and VoIP as data?
Is SIP really better than HTTP? Follow-up to why use SIP.
Does STUN only work for UDP? Follow-up to how NAT Traversal and STUN work.
How can choppiness during a phone call be eliminated?
Does Spanning Tree Protocol have an adverse effect on VoIP?
Why should I use SIP for VoIP?
Is there a provider or out-of-the-box solution that will monitor a network comprised of hardware fro
How do we stop Wi-Fi signal-hopping?
What is the difference between VoIP and IP telephony?
Is there a generic blueprint for an IP-based call center?
What is the difference between VoIP and VoFR?
What's the best option for global VoIP service?
What automated tools exist for VoIP networks?
Can VoIP and PSTN PBX work together?
How can we run D-link DPH-140S phones on Cisco CallManager Express?
What are your suggestions when implementing SIP on a VoIP network?
What factors need to be considered when replacing a PABX system with VoIP?
Do other methods exist for analyzing poor QoS on a VoIP network?
What should be considered when deciding between Avaya and Cisco?
What to consider before implementing a VoIP network
Will VoIP telephones work successfully in a small LAN?
How do NAT Traversal and STUN work?
VoIP pros and cons
Do I need DDNS to access my PC?
How do we fix 'echo', 'static' and background noise on our new VoIP system?
Do service providers use SIP or H.323 to communicate between their VoIP networks?
We're opening a remote office -- should we get a new vendor who offers local support and SIP instead
How to set up a simple VoIP network on an existing LAN
A comparison and description of SIP and H.323
How many user agents can participate in a SIP or H.323 conference?
VoIP over wireless
Can I test MGCP loopback capabilities without buying the equipment?
How do I use VoIP through the PSTN without using a softswitch?
Follow-up to Can I bypass the PSTN with my current router/gateway setup?
Can I set up a VoIP network infrastructure over broadband Internet?
How do I know when dropped calls happen because of my equipment or my service?
Traffic logging and VoIP encryption
How can I resolve a compatibility issue between our VocalTec gateways and our carrier's Cisco gatewa
How VoIP can save you money and Wi-Fi in the office.
What is the difference between ground start signaling and loop start signaling?
What is the difference between a SIP-enabled phone and an IP phone that is not SIP-enabled?
How do I have one line dedicated to VoIP on my system?
Is there a standard for encryption of traffic between IP phones?
Can I bypass the PSTN with my current router/gateway setup?
Does the phrase 64 simultaneous calls on a T mean 64 extensions?
Difference between IP PBX and VoIP box
Which certification courses would be most fruitful?
Cisco tools vs. Prognosis
Can I reconfigure my ports without restarting my gateway each time?
VoIP in a wireless environment
How do you set up a VoIP termination?
What kind of compression is used in VoIP?
How does my VoIP phone know what my number is after I move it?
VoIP vs TDMoIP
MAC costs in legacy PBX vs. IP telephony environments
Connecting VoIP with IP PBX
Pros and cons of VoIP
Is CCVP certification a marketable skill?
Can you set up VoIP on ISDN?
How can you test whether a network would suffer from VoIP?
What is the standard to do a cost analysis as well as ROI?
Can we install VoIP phones on our fiber backbone network?
What is the difference between an analog and a digital PBX?
How do I design and implement my own VoIP startup?
What should I know about the Shoretel IP switch?
What should I know about H.323 when we upgrade our system?
What is the ideal DC voltage across the NT1?
For mobile workers who travel internationally, how does VoIP cut costs?
What is the impact on staffing from using a route analysis tool?
How do I set up a commercial IP800 service in another country?
How do I create a customized call center?
What protocols can be used to facilitate communication between a voice card and an IVR system?