SIP telephone system is a communication type for which only internet is needed. This type of communication is established via special SIP protocol. SIP clients can be located in various areas of phone network, but they will always be available via their unigie numbers. This communication type allows to exchange various data, including audio and video transmission, and also text messages, to do call forwarding to mobile and landline phone numbers. It is also possible to add additional clients to the phone line and make conference calls.
Every client connected to provider gets his/her unique number. Communication between the cellular network subscribers is performed through the quickest channel. Broadband Internet or a separate line of the provider that offers the service of IP-telephone system, is used for connection.
"SIP Phone" tab
The tab SIP-phone allows to change settings for making calls to the mobile phone of a driver or to the SIM-card of a tracking device in case if the tracking device has headset/earphone.
To activate this service, one needs to create an account on the website of any SIP phone system provider (the balance should be positive).
Please note: you need to get information on rates from the SIP phone system provider that you have selected.
![5. "Ok" button]](drex_module_2_6_8_10_control_5.png){kind=small}
