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).

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We are in the process of deploying Skype for business to our infrastructure.
the question that came up was which method of call processing is preferable and what are the pro's and cons of each or of u…

Find Ransomware Secrets With All-Source Analysis

Ransomware has become a major concern for organizations; its prevalence has grown due to past successes achieved by threat actors. While each ransomware variant is different, we’ve seen some common tactics and trends used among the authors of the malware.

I'm working with a Cisco UC520 phone system and have been having issues with call transfers to 2 extensions. If someone calls the main number from the outside and requests to be transferred to either …


Hi there,

I have a voice prompt issue with my Asterix (Elastix).

When I make an outbound call to a number that does not exist, instead of prompting "no-longer-in-service.gsm" it prompts "all-cir…


I had this question after viewing skype auto redial (https://www.experts-exchange.com/questions/28795479/skype-auto-redial.html).

I want a simple program that will attempt a busy number 60 times. Mo…


Have a call center/answering service with 150 lines.  our VOIP phone equipment is in our office.  it sucks, call quality not that great, and i can't do half the things i was quoted.  looking to move t…


Setup 8x8 in August, ported all the numbers over and set everything up internally.  All the internal routing works, call quality is good and has overall been a success.  Now I am hearing from my custo…


We migrated from an in house Exchange server to Office 365.  Since then, I cannot get my Phone system (Mitel 3300) to forward voicemail to email.  I have setup a relay on 365 (I think correctly).  I h…


Just purchased Virl and wanted to know how most are using it without having an elavorate powered laptop?  If I need to go hosted, what's available at what cost?  Where do I get labs to play with?


When I dial someone to call such as to 123-123-1234 the number dials someone else such as 123-444-4444. Is it a configuration issues and how do I correct it?

Also, how can I change the caller disp…

Skype for Business

Skype is a P2P (Peer to Peer) instant messaging and VOIP (Voice over IP) service – as well as a whole lot more.

IT, Stop Being Called Into Every Meeting

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

Supposed you had a 100Mbps link between switch 1 and switch 2. The latency between switch 1 and switch 2 at another site is 20ms consistently. The amount of bandwidth consumed on this link is never mo…


It's time to replace our ageing Cisco switches as we are moving to a gigabit phone system. We have been quoted for Cisco 3580 - POE 5k for a 24 port and nearly 10k for 48 port - my boss fell off his c…


Hello All,

I have 3 Cisco 3850's LAN Based Software (POE+) switches. I am not 100% familiar with Cisco products, more like 40% familiar and have been managing this network for several years with g…


If your business is like most, chances are you still need to maintain a fax infrastructure for your staff. It’s hard to believe that a communication technology that was thriving in the mid-80s could still be an essential part of your team’s modern IT environment.


Does anything think it's possible for the scammers to identify your public IP and then your LAN devices based on your phone number?  Just wondering what their capabilities are for my own edification.…


I'm trying to get the logic down and see if this is possible with our BCM450 system.

The incoming call is supposed to basically do the following:

Incoming Call  ->
 -- Ring Extensions 3401,3402…


Hi Experts,

I purchase several 2811 to learn voice. I also purchased a AIM-CUE card, open the router to install it but I can't figure out where to install the AIM-CUE card inside the Cisco 2811 rou…


Our email admin has been out and I need to know how to add a voice mail account in Exchange UM.
Can anyone give me the process basics? Thank you.


Say, I want to set up an IVR for ourselves and am looking for some guidance in regards to the following:
We are using a cloud based platform that accepts wav files for the IVR. Its a simple IVR to of…

How your wiki can always stay up-to-date

Quip doubles as a “living” wiki and a project management tool that evolves with your organization. As you finish projects in Quip, the work remains, easily accessible to all team members, new and old.
- Increase transparency
- Onboard new hires faster
- Access from mobile/offline

I am interested in the challenges of VOIP on BYOD devices.  Applies to both iOS and Android smartphones.

Could someone confirm the following:

i. Let's say I have a VOIP client running on my per…


I dont get good reception in my office due the height of the tower I am in and therefore thinking of buying a Vodafone Sure signal adapter.

Does anyone in the UK with specialist telecoms technical …


Related to my question here on VOIP for BYOD smartphones.

Need to understand, for iOS and Android:

v.  Is it correct that if the VOIP client was not running in the background (e.g. iOS memory ma…


iOS10 has Callkit which opens up a lot of the native iOS features for third party VOIP clients on iOS.

Does Android already do this? Or is this feature on its way too?


100+ desks only have ONE RJ45 network cord

Do both devices need to be on the same VLAN if
I daisy chain from my phone to my computer since
they will be using the same 10+ year old CISCO switch …


We are an organisation with offices in US, EMEA, APAC.

Each office has an IT department, and each IT group has their own on call Blackberry for weekends/evenings. End users ring the Blackberry for …

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RELATED TOPICS view all topics

  1. IP Telephony
  2. Telecommunications
  3. Routers
  4. Switches / Hubs
  5. Networking
  6. Cisco
  7. VPN
  8. Exchange
  9. Networking Hardware-Other
  10. Hardware Firewalls