IP Telephony




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IP telephony (Internet Protocol telephony) is a general term for the technologies that use the Internet Protocol's packet-switched connections to exchange voice, fax, and other forms of information that have traditionally been carried over the dedicated circuit-switched connections of the public switched telephone network (PSTN). Using the Internet, calls travel as packets of data on shared lines, avoiding the tolls of the PSTN. The challenge in IP telephony is to deliver the voice, fax, or video packets in a dependable flow to the user.

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Hello Guys,

I am looking expert  advice / help if some one can tell me how  I can enable the voice mail box in unified messageing environment.
I have all ready done following steps.
1.new mail …

Efficient way to get backups off site to Azure
Efficient way to get backups off site to Azure

This user guide provides instructions on how to deploy and configure both a StoneFly Scale Out NAS Enterprise Cloud Drive virtual machine and Veeam Cloud Connect in the Microsoft Azure Cloud.

Assuming you have multiple Call Managers on the Cisco side and multiple Lync Front End servers - is it possible to configure things so that calling can continue to work even if one Call Manager goes …


As I understand it, some SIP phones and conferencing equipment has built in connection quality analysis but in this case, nothing being used seems to have such capabilities I'm told. That isn't the …


QoS is new to me.  I'm just trying to get a better understanding of my options before I learn how to implement it.

I have some voice servers located in a data center.

I have several small/medium…


will be setting up my own pbx (piaf/3cx).   will either use anveo direct, voip.ms, or cc for incoming and outgoing calls.  

right now just have our plain old internet connection (50 down, 5 up).


I am using a webbrowser phone to make outgoing calls. I would like to use it when I click on a phone number link in a webpage. In the registry I have changed HKEY_CLASSES_ROOT\tel\shell\open\command …


It seems that when end users are trying to get into their own voicemail or leave a voicemail for another extension, it is timing out. Either the VM box does not pickup or rings indefinitely.


I'm new in VOICE.
I'm using Cisco Unity Connection, client requested to change an extension to a different users.


We are running CUCM 10.5 as a VM on a UCSC-C240 - eight of these. It seems like I should be able to snap shot a UCM VM from one of the ESXi to another. But each is managed individually. If there was …


Attached is the sh tech from the router, also attached is the sh run and sh policy-map for the interface in question, basically we want to confirm the QoS policies we have currently configured, we had…

What is SQL Server and how does it work?
What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

Hello Experts - I'm preparing my network for a new VoIP phone system from 8x8 and have been running into a problem during testing.  One of the tests checks to see if SIP ALG is disabled and I am …


I have a SonicWALL NSA 250 in front of my network which includes TalkSwitch phone system. My SIP service provider is NexVortex.  This setup has worked fine for at least the last 5 years and probably …


I am looking for suggestions for cloud or self hosted VOIP based ONLY on your recommendations of actual use or your own client's experience if you assisted or manage installation/usage.

Currently …


When you use Office 365 for voice - I imagine your call setup is all done via client conversation to the MS PBX in their public cloud. But say you want to talk to someone in your own office a few …


We are launching three remote sites within next 3 years. I am wondering what will be the best option for phone system.  We currently have Shoretel Onsite, and going with Shoretel Hybrid or Online is …


I have a remote site which will have just a T1 of bandwidth for VOIP. Most of the time that will be more than enough to handle calls from a small office. But I was thinking that if a phone needs to …


Hello Friends,

I am running with Cisco UC560 as a telephonic system for my company.

Currently requirement is to restrict outgoing calls made to any mobile with pass-code.

So if any users …


I downloaded from CUCM 10.5 plugins CcmServRtmtPlugin.exe. When I try to run as administrator on Win7 I get:

Error: Could not create the java virtual machine
Error: Fatal error has occurred.


Hello Experts - We are going to be installing a new VoIP phone system from 8x8 in a couple of months and I wanted to see if I could get some guidance on changes I should be considering for my …

Microsoft Certification Exam 74-409
Microsoft Certification Exam 74-409

Veeam® is happy to provide the Microsoft community with a study guide prepared by MVP and MCT, Orin Thomas. This guide will take you through each of the exam objectives, helping you to prepare for and pass the examination.

Goal is to move Publisher CUCM 10.5 from one data center to another. The IP address ranges in the new DC would be different. What would be the easiest way to migrate?


I would like to make regular backups of the VM or the entire ESXi. What are the common
methods for backing up?


I have Cisco 7821 MRA phones for my remote users. Do they have any technologies which help overcome the variability of voice performance over the Internet?


If you have the password to be able to SSH to a CUCM, will those same credentials work in the GUI for
Disaster Recover, Prime License Management, OS Administration? Thank you.


If you have a CUCM 10.5 which is showing that you're you're operating with insufficient licenses - could it be the case that long un-registered phones are causing the over-limit condition? Or do …


I have the uid/pw for the ccmadmin/servicability. But for OS administration, Cisco Prime on thepublisher and DR it appears lost to the winds. Is there a recovery procedure for those?

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RELATED TOPICS view all topics

  1. Voice Over IP
  2. Telecommunications
  3. Routers
  4. Networking
  5. Cisco
  6. Linux
  7. Switches / Hubs
  8. Exchange
  9. Networking Hardware-Other
  10. Chat / IM