What is VoIP, how a call over the internet works and what it gives a business number
Sado AI team · · 4 min read
In short
VoIP (voice over internet protocol) is technology that carries a phone call over an internet network instead of a copper line. The voice is split into small digital packets, sent across the network and put back together as sound at the other end. A Telegram or WhatsApp call is VoIP too. For a business, VoIP means IP telephony: calls to your city number are answered on a computer, an app or an IP phone. An AI voice operator connects to your number the same way, over SIP.
How VoIP works
- A customer calls your city number from an ordinary phone.
- The telecom operator turns the call into digital form and sends it over the network.
- The call reaches your receiver over the SIP protocol: an IP phone, a computer program, a smartphone app or an AI operator.
- The reply travels back the same way. To both sides it’s an ordinary phone call.
SIP is the most common “language” of VoIP: it sets how a call starts, connects and ends. That’s why IP telephony is often called SIP telephony.
Plain line vs VoIP
| Plain city line | VoIP (IP telephony) | |
|---|---|---|
| Calls at once | One line, one conversation | Several conversations on one number |
| Where you answer | The desk phone | Computer, app, IP phone |
| If the office moves | The line must be laid again | The number moves with you |
| Recordings and reports | Usually none | Call recording and call log |
| Connecting an AI operator | Not directly | Connects over SIP |
Example: a freight company in Tashkent
“Yuk Yo‘li” (name invented) moves freight around the city and to the regions. The office had two plain city lines. From nine to ten in the morning both were busy, and a third customer heard the busy tone and called a competitor.
- The company moved the same number to IP telephony with its telecom operator: same number, more conversations at once.
- Dispatchers take calls on their computers, and recordings of calls with drivers are kept.
- Then an AI operator was connected to the same number: at night and in the morning rush it answers and takes the order (from where, to where, what cargo).
- When a price needs agreeing, it puts the call through to a dispatcher, by rule.
Nothing changed for customers: the same number, just no busy tone.
VoIP and an AI voice operator
Sado connects to the company’s current city or mobile number through its operator’s SIP / IP telephony, for example Sarkor or UTeL, or works on a new number. The number stays yours, customers call the same number, and outgoing calls come from it too. Sado’s team does the connection; no code is needed from the company (how to connect your number).
- It answers incoming calls in about a second, more than ten at once.
- On outgoing calls it calls leads right away and makes reminders and confirmations.
- By your rule, it puts the call through to a staff member’s phone.
What to ask your telecom operator before moving to VoIP
- Can my current number work over SIP, or must it be moved?
- How many conversations can run at once?
- What do incoming and outgoing calls cost?
- Is call forwarding to another number available?
- Where do calls go if the office internet drops?
With Sado you pay only for talked minutes: 800 so‘m a minute, no monthly or setup fee. Try it live or call 78 778 01 23. More answers: questions about Sado.
Questions
Are VoIP and IP telephony the same thing?
Nearly. VoIP is the name of the technology that carries voice over the internet; IP telephony is the business phone service built on it. Both usually use the SIP protocol.
Will my number change if I move to VoIP?
Usually not: the telecom operator moves the same number to IP telephony. Check the exact terms with your operator.
Is call quality worse over VoIP?
It depends on the network. With stable internet a call sounds like an ordinary phone call. Echo or delay usually point to a network or equipment problem.
Do I need a developer to connect an AI operator?
No. Sado connects to your number through your telecom operator’s SIP line, and Sado’s team does the connection and setup. You only tell it what to say and which questions to ask.