What is Voice over IP?

Voice over IP, or Voice over Internet Protocol to use the full title, is simply a means of making telephone calls over a data network instead of over the traditional analogue public switched telephone network (PSTN).

The term VoIP describes the use of the Internet Protocol (IP) to transfer speech between two or more sites. Inherent in the term is the management of the protocol. In general, this means that the voice information is encoded into discrete digital packets and then transferred across an IP-based network.

There are many advantages to this method of telephony, primarily the cost savings that can be made by avoiding the use of the traditional PSTN. In addition to cost savings, the digital nature of VoIP allows easy administration, the implementation of additional services such as voicemail, and a reduction in the physical cabling required for new installations.

VoIP offers a number of potential advantages and benefits to its users:

  • Reduced operating cost, including lower telecom charges
  • Flexibility
  • Reduced infrastructure
  • Integrated services and greater user features
Is VoIP safe and reliable ?
Yes, it is !!!

The switch to VoIP, which has been happening for years, is now accelerating. About 25% of international carrier calls use VoIP / VoFR / VoATM. This figures doesn't include calls that are intra-corporate calls carried on WANs but just those calls handled by carriers. Most of the growth in international calling has come on VoIP networks; most installations of new capacity have been of VoIP capacity. All of the North American and European telecom operators take advantage of using VoIP. Let’s name some – AT&T, MCI (WorldCom), Level3, Sprint, British Telecom, Deutsche Telecom, Telecom Italia, France Telecom, Global Crossing, Telecom of Iran, China Telecom and etc.

IP telephony services to wide range of customers like ITSPs, calling shops, companies and etc.

AMS TeleHouse in London is peered to the largest Internet backbone networks thus providing minimum delay and fast access from practically all points in the world.

AMS is interconnected with 2 of the largest Tier-1 Telecoms which provides excellent call quality and 99% redundancy / failover / reachability. We also maintain direct routes to high traffic destinations.

Our H.323 platform works with any kind of H.323 enabled gateways and gatekeeper / softswitches. Our technical engineers will provide you with assistance to connect your

H.323 voice gateway / gatekeeper to our platform at no charge. Even if your equipment is unknown to us, in no time we will get acquainted with it and get it running against our telephony platform.

Presently we offer technical support for:

  • Cisco voice gateways, Cisco ATA mini-gateways, Cisco Call Manager
  • Quintum voice gateways (analog, digital, CMS)
  • GNU gatekeeper
  • MERA softswitch


Frequently Asked Questions

Q. Do you support SIP / MGCP / VoFR (Voice over Frame Relay) protocols ?
A. At the moment, AMS telephony platform supports only H.323 protocol over IP.

Q. Do you offer online billing, where I can monitor my usage and credit balance ?
A. YES, we do! We provide all customers with access to our web-based online Billing system in realtime. It is updated right after every call.

Q. Do you offer hosted billing, where I can put my own prices ?
A. YES, we do! Contact AMS sales representative to arrange it!

Q. Which H.323 interconnection methods do you support ?
A. All of them:
1. terminal registration to a gatekeeper (GRQ/RRQ)
2. direct H.225 gateway-to-gateway signalling
3. remote zone routing (LRQ) - gatekeeper-to-gatekeeper signaling

For more information look at our “VoIP test request” form.

Q. Is it possible to arrange a test circuit with you ?
A. Definitely! Download our VoIP test request form and e-mail it at sales@ams-sat.com with Subject “VoIP test request”.

Q. How may I have your A-Z price list ?
A. Send an e-mail to sales@ams-sat.com


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