VoIP numbers. VoIP telephony enables the HD Voice

Elements making up the VoIP service are:

– URI: Uniform Resource Identifier, is the account that identifies, along with the password, the individual user of the service, which is authorized to make outgoing calls and to receive calls on the numbers associated to the URI. Each URI is represented by a 7-digit number (internal numbering of KQI). To a single URI more incoming geographical numbers (calling one of these numbers will “ring” the account) may be associated, and a CLI (show calling number), which is the telephone number presented to the recipient when you make an outgoing call from that URI.

– Numbers: are the telephone numbers with area code (beginning with 0) assigned to the customer. They may be new or “ported” (ie belonging to the client with its another carrier, ported and managed on the Voip platform of KQI). The customer will receive, via the VoIP platform, telephone calls from any subscriber (fixed or mobile networks, national or international) allocated to its numbers.

– CLI (caller line identifier): is the telephone number displayed to the called party when making outgoing calls via a particular account. It can also be different from the geographic number associated with the account for incoming calls.

– Channels In / Out: represent the maximum number of concurrent calls incoming and outgoing accepted on a given URI.

– Number Portability (or Service Provider Portability, SPP) is the transfer operation of a geographic number from a telephone operator to another. If the customer wants to receive calls on a VoIP infrastructure, to the number already in the possess of the customer, the customer has to ask its current carrier to port their number to the new operator Messagenet (used by KQI for VoIP service)

– User: identifies the customer of a VoIP carrier (or a department of the customer). It may contain different URI’s, associated to a single overall traffic limit.

The advantages of VOIP

The VoIP phone guarantees, as primary benefit, a clear reduction of the costs of telephone calls, whether national, international or intercontinental. In fact the pricing is just the real connection time, there are no connection fee or other hidden costs. If the communication takes place between two customers connected to the Cloudtel’s network, for national calls no charges are fprseen. VoIP technology also stands as guarantor of security; It lets filtering unauthorized access, as well as protecting the communication data through a sophisticated firewall system.

The VoIP Service information

VoIP services (IP Trunking) allows you to access the internet phone services for:
Domestic and international calls with the rates specified in the price list accepted by the Customer receiving incoming phone calls

Firewall and Internet Protocol used

The protocol used for VoIP services is the SIP that uses certain ports and protocols that must be enabled for proper operation of the service.

Codec and Broadband

The voice carried with VoIP protocol uses an encryption mechanism (defined by the “codec”) that can be changed at every communication, depending on the negotiations between the two systems in the negotiation phase of the phone call. The codec used determines the Internet bandwidth that will be used for the call.
Voip Codecs supported by -CLOUDTEL service, and the bandwidth used in each communication (including overhead, ie the bandwidth used for reporting and data headers), are:

  • G.711 bandwidth from 87.2 Kbps
  • G.729 bandwidth from 31.2 Kbps
  • iLBC (Internet Low Bitrate Codec) from 27.2 Kbps bandwidth

Voip identifier (URI)

Access to VoIP service is enabled through the use of an identifier called URI ( “uniform resource identifier”) and is used by the system to locate the user within the Internet, associating the IP address from which the user has authenticated itself to the associated geographic numbers.
CloudTel offers the possibility to activate any geographic number with a prefix of your residence throughout the national territory in a few hours. Creating GNR 10/100/1000 numbers DDI.


Terminals (Phones)
All hardware and software devices that comply with the SIP specifications and Codecs supported by CloudTel are compatible and functioning

Telephony services on IP CloudTel require a large (xDSL), preferably dedicated bandwidth connection, in Fast mode. The Minimum Guaranteed Broadband Connection on which the voice traffic will be conveyed must be sized appropriately on the basis of the following factors:

Voice channels
CloudTel offers the ability to enable multiple simultaneous conversation for each VoIP number.

Additional notes
For the best quality of service, where t VoIP traffic and normal Internet traffic (web, email, etc.) are shared on the same connection, the installation of hardware devices that enable the management of QoS (Quality of Service = quality of service) is required to be able to give priority to the IP voice packets over other types of transmission packets. VoIP requires careful design of the LAN and an appropriate sizing of the transmission capacity of the data network.