It is easy to say that a diesel car is better than a sports car with petrol in terms of consumption , but everything changes when the comparison is made on the basis of parameters such as speed or recovery. Before then activate a subscription VoIP therefore , one must also consider that this technology has flaws . The main concern the quality of voice transmission and reside in some of its technical characteristics that are the basis of the operation of Voice Over IP .
The switching times and packet transmission may vary depending on traffic jams that occur on the Net Just a slowdown in the computer system from which you are connecting , or the poor quality of the line used by ADSL or , again, the distance from the central Telecom nearest to invalidate in a sudden the quality of the audio signal . Another limitation of VoIP is the fact that the majority of providers do not allow you to call emergency numbers : no 113 , 112, 118 or special numbers , such as those in charge to replace the old 144 . Another limitation , this time not so much linked to the technology as the supply of providers , is that not all operators provide a physical numbering to assign virtual VoIP users , so as to allow account holders to be called Voice over IP via the traditional telephone line (or from a mobile phone ) by those who have necessitàdi do so. If this feature is not offered or enabled, you can use VoIP to call , but you may be contacted via Voice over IP only by users of your service provider myself.
The selection of a virtual geographic number is an additional service for which the holder of a VoIP subscription pays , in general, an additional fee . Calls to a virtual number instead have the same charges as those submitted to a standard numbering and related charges depend on the landline or mobile phone plan chosen by the caller. To take advantage of VoIP is no longer necessary to use a rather a ” softphone “, or clients that emulate the telephone , free programs such as MSN Messenger, Yahoo Messenger and Google Talk, programs which required users to sit in front of a computer for the duration of the call. The vast majority of providers offering services that can be used via USB or IP phones or , even, as we shall see, using the old equipment fixed telephony . Some carriers , such as Jajah , offer a solution yet different VoIP call phone to phone , that is, ” from phone to phone .” To make calls in this case you do not need a phone , from the PC, using your account , you type two numbers you want to connect (the caller , that is his own, and that of the receiver) . Part then the VoIP call to the telephone caller , which is done ringing , once lifted the handset , the call is forwarded to the required number. There are many companies that have launched tariffs dedicated to Internet telephony.
Considering only the phone market there are hundreds and hundreds: to be able to juggle the myriad of offers is quite a feat . To choose the subscription you have to first understand what type of service is closer to your needs.
Telephone traffic is mainly to national or international numbers ?
Landlines or mobile phones ?
And if the mobile phone is , what managers ?
The calls will be made to the same countries or destinations will always different ?
And, again, the use of the phone is casual or , on the contrary , intensive ?
The proposal VoIP you want to subscribe, also includes free access to browse online ? Only by answering these aa ( and other questions ) you can tell if a particular tariff profile is profitable or not . The table present in these pages have been inserted flat rates ( if available) and the ” consumption” as calls to landlines and Italian network to the mobile numbers of operators in our country. Rarely subscriptions have an activation cost .
Sometimes require a monthly fee that includes free calls (Skype and Talk ) , calls for which is counted the only connection fee ( Digitel ) or phone at discounted pricing (Telecom Italy ) . More often the mode of payment is ” consumption” ( Cheapnet , Eutelia and many others). Disentangle the various proposals is therefore not straightforward, because often it seems they are the same providers do not want the user to understand tariff plans
. For example, it may happen that after many tests and comparisons, you opt for a manager who apparently offers the cheapest service , only to realize that VAT is not included in the prospectus and that , considering the computation , the operator chose between showing their the most expensive !
Limits of technology Voip