Voice Over IP

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Voice over IP (VoIP) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. Other terms commonly associated with VoIP are IP telephony, Internet telephony, broadband telephony, and broadband phone service. The term specifically refers to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN).  Examples of the VoIP protocols are H.323, Media Gateway Control Protocol (MGCP), Session Initiation Protocol (SIP), H.248 (also known as Media Gateway Control (Megaco)), Real-time Transport Protocol (RTP), Real-time Transport Control Protocol (RTCP), Secure Real-time Transport Protocol (SRTP), Session Description Protocol (SDP), and Inter-Asterisk eXchange (IAX).

Related Topics

  1. IP Telephony
  2. Telecommunications
  3. Routers
  4. Networking
  5. Switches / Hubs
  6. Cisco
  7. VPN
  8. Exchange
  9. Networking Hardware-Other
  10. Hardware Firewalls
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I have an Ooma telephone system and a LSI Network-LSI PCI-SV92EX Soft Modem in a PCI/E slot on my Dell XE2 I5 Desktop with 32GB of memory running Windows 10.  I want to be able to use that modem and …

249 views
DevOps Toolchain Recommendations
DevOps Toolchain Recommendations

Read this Gartner Research Note and discover how your IT organization can automate and optimize DevOps processes using a toolchain architecture.

We have a small network of 12 computers all Windows 7Pro on a Windows 2008 SBS server.  We have Comcast business internet with 1 public static IP that is used to point phones and MX records and remote…

2775 views

have a new polycom vvx410 with the latest firmware and need to simply set a parameter to 1.

voIpProt.SIP.header.diversion.enable="1"

cant find the setting in the web interface, so i exported the…

320 views

I hope this sounds at least somewhat educated but honestly, I'm kinda flying blind here. Here's what I'm up against.

I have a Skype for Business 2015 Server that is up and running. IM and internal …

3873 views

Have Cisco UCM platform, trying to change user on a phone, went in and associated device with new user, when into device and changed owner user ID and Description, but still showing old user...I've …

1025 views

Got a weird issue.  I have a toll free number that I’m forwarding to a cti route point that goes to a group voicemail in unity.  If I call the local number the toll free routes to, I get the …

219 views

I support a remote center that has phone over a PRI line. At the moment, no calls can go in or out. When I look at the router, Cisco 2901, there are no recent errors on the line, but the output for …

837 views

I have a situation where I have configured switchport to access access vlan 4 and voice vlan 12. Need less to say I have all the necessary vlan configured. I am using Sangoma S500 phones. So When I …

215 views

I have a block of phone numbers with my SIP service provider. Over the last few years we have laid off quite a few people. These people were deleted from the SfB server but their extension was not …

436 views

Our ISP has set up a SIP Trunk for us.  They poll to us every 30 Seconds, which is fine.  They are telling me I stop responding to OPTIONS after some period of time.  Obviously i cannot make or take …

443 views
Free Tool: Postgres Monitoring System
Free Tool: Postgres Monitoring System

A PHP and Perl based system to collect and display usage statistics from PostgreSQL databases.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

I have a business phone system that currently has only two CO lines. It has 16 extensions.  It is an Avaya ACS-R7 system NOT especially designed for VOIP. Here are my questions:
1. If I want to make …

217 views

We have a ShoreTel phone system and at one of our locations there is a fax machine that needs to be moved. It was in the current office when we aquired this location and put in the phone system. I …

332 views

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 …

234 views

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 …

893 views

Hi,

I have a Fusionpbx system (version 4.2.0) and at this point I've only been using it to route sip trunks and I've been looking around for a way to add more then one fusionpbx system but set it …

273 views

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…

754 views

spam block versus full block

what does caller hear when they have been spam blocked googlevoice

256 views

now and then, it would be nice to be able to send an SMS from my desktop
not even one per day, so preferably it should be free
i have no GSM, or smartphone, only a fixed Phone
is this possible, and…

1477 views

Hi All

I hope you all can support me we have a hunt group with four extension numbers within however what I'd like to do is allow the last extension number within the hunt group to go to the users…

1043 views
NFR key for Veeam Backup for Microsoft Office 365
NFR key for Veeam Backup for Microsoft Office 365

Veeam is happy to provide a free NFR license (for 1 year, up to 10 users). This license allows for the non‑production use of Veeam Backup for Microsoft Office 365 in your home lab without any feature limitations.

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).

653 views

Hi,

We are getting a new phone system and the they suggest us to get a POE switch to power the phone.  I have two questions and I was wondering if EEs could help

1. Any good POE suggestion? 48 …

831 views

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.

1634 views

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

549 views

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 …

361 views

What is the difference, if any if I configure access port to the IP phone let's say with voice vlan 10 and if I configure trunk and add voice vlan 10?

Is there any greater priority given to Voice …

257 views
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Voice Over IP

8K

Solutions

10

Articles & Videos

6K

Contributors

Voice over IP (VoIP) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. Other terms commonly associated with VoIP are IP telephony, Internet telephony, broadband telephony, and broadband phone service. The term specifically refers to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN).  Examples of the VoIP protocols are H.323, Media Gateway Control Protocol (MGCP), Session Initiation Protocol (SIP), H.248 (also known as Media Gateway Control (Megaco)), Real-time Transport Protocol (RTP), Real-time Transport Control Protocol (RTCP), Secure Real-time Transport Protocol (SRTP), Session Description Protocol (SDP), and Inter-Asterisk eXchange (IAX).

Related Topics

  1. IP Telephony
  2. Telecommunications
  3. Routers
  4. Networking
  5. Switches / Hubs
  6. Cisco