Call Tracking or "mobile office" is a handy feature for companies when installing VoIP equipment used to receive calls from customers, with the possibility of further redirection.
This virtual number service is suitable for employees on the road who want to use, for example, SIP-telephony, and do not be dependent on how much the provider is reliable.
A common principle of call tracking is when firms indicate a virtual number in the advertisement to attract customers. It receives calls, and they are forwarded to the employee's real phone. It can be a mobile phone, urban or SIP-phone/softphone. Virtual telephony that forwards calls is useful because neither the client nor the employee is tied to a particular place, and the number is stored in the case of moving.
The virtual number system with notification when forwarding can be set up through Asterisk. Software IP PBX provides an opportunity to realize a functional on the server. For example, when constructing the telephone network for Si2000, using DX-500 Quasar-M is used for PRI E1. Phones are numbered using 5 digits: 2хххх — 5хххх.
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The virtual number function is created by connecting a multichannel Gsm Sip Gateway, setting up call forwarding to a mobile phone, with a notification via SMS and email2sms services.
The MultiFon account should also be joined to the system. Outgoing calls are made via available equipment channels. It is important to prioritize calls.
Prefixer, redialing numbers should also be set on mobile phones. The principle of operation of this function is as follows: when a subscriber is dialing a GSM-number, the application intercepts a call and makes a 3-second pause for a voice greeting. Then the channel numbers are dialed via DTMF calls.
Another important function for forwarding is a CallerID. This is a function of identifying numbers - the caller sees the incoming caller's number. If you cannot answer a call, a text message with the phone number is sent. At the same time, the VoIP system allows you to keep a virtual number on the server. It is always possible to go to your account from a computer or any mobile device to communicate with the caller.
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