-
How can VoIP be integrated into an existing PBX system?
I am trying to integrate VoIP into my existing PBX system. I have a Talkswitch 48CVA which supports both PSTN and VoIP lines. My main phone number is a landline which forwards calls to my VoIP line...
-
Is SIP really better than HTTP? Follow-up to why use SIP.
In a previous question, I asked why should I use SIP when my application built on HTTP works fine. You replied that SIP provides URL dialing. Yet, so does my application, with better session routin...
-
How does the cellular phone company charge for IP-based calls?
If I am using my cell phone as I travel and suddenly it accesses an IP network or starts using SIP, how does my service provider know where I am at to charge me any applicable fees?
-
How does the service provider differentiate between data and VoIP as data?
For our mobile devices in trucks, we use GSM/GPRS communication. Our customers are paying for a certain data amount -- depending on the service package to which they subscribe. We use a modem in ou...
-
How can choppiness during a phone call be eliminated?
I have a WAN that consists of two LANS. On that network there are two Toshiba phone switches. I wouldn't say that it is a VoIP system as the individual terminals are digital. For some reason we spo...
-
Does STUN only work for UDP? Follow-up to how NAT Traversal and STUN work.
Why does STUN only work for UDP? Can TCP be supported?
-
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?
-
Why should I use SIP for VoIP?
If my application can do the work for a VoIP call established via HTTP, why should I use SIP?
-
Is there a provider or out-of-the-box solution that will monitor a network comprised of hardware fro
I have a mixed telephony environment (i.e. Avaya, Alcatel, Cisco, Siemens and Nortel), some of which are legacy as well as international presence. The architectures are migrating from a spoke-and-h...
-
What is the difference between VoIP and IP telephony?
Learn about the differences between VoIP and IP telephony in this expert response.
-
How do we stop Wi-Fi signal-hopping?
How can we solve a problem of Wi-Fi signal-hopping in our office and hotspot environment? We have 4 x 802.11a/g Wi-Fi Linksys hotspots, but we loose connectivity when moving between hotspots within...
-
Is there a generic blueprint for an IP-based call center?
Is there a generic blueprint for an IP-based call center? Where could I find one?
-
What is the difference between VoIP and VoFR?
What is the difference between VoIP and VoFR?
-
What automated tools exist for VoIP networks?
What can automated tools, such as Viola Networks, NetIQ Vivinet and Qovia, do for my VoIP network? What do you suggest when deciding on which tools to use?
-
Can VoIP and PSTN PBX work together?
Can we use VoIP and a PSTN PBX with each other? When there is a problem with the PBX, will the VoIP still work and our calls still connect?
-
How can we run D-link DPH-140S phones on Cisco CallManager Express?
I help run a Cisco network. Normally we use Cisco series IP phones 7912, 7940 etc. But we are trying to put a D-link DPH-140S phone onto the network. It is currently not working. We can get the pho...
-
What's the best option for global VoIP service?
How do we determine the best option when choosing a VoIP service provider who supports global customers?
-
What are your suggestions when implementing SIP on a VoIP network?
What are your suggestions when implementing SIP on a VoIP network?
-
Do other methods exist for analyzing poor QoS on a VoIP network?
Do other methods exist for analyzing poor QoS on a VoIP network?
-
What factors need to be considered when replacing a PABX system with VoIP?
What factors need to be considered when replacing a PABX system with VoIP?
-
Can you mix different unified communications solutions?
It is possible to mix different unified communications solutions to fit your needs, says UC expert Jon Arnold.
-
What is a call park phone feature and how does it work?
UC expert, Matt Brunk, explains a call park phone feature, how it works and how it compares to a visual call park feature in this expert response.
-
What drivers are funding the growth of video platforms?
There are four drivers that are spurring video interest and funding the procurement of video platforms, says Nemertes Research's Irwin Lazar.
Submit a question to our experts