How to save on telephony?

Question

Telephony

The authorities gave the task to save on telephony, at the moment there are about 30 analog lines in the office, about 600 tr. per year, how can you save? So that local residents can call from landlines and do not charge long-distance charges from them, and so that my employees can also call them without charge. But we often communicate with our capital and all communication costs follow from here. The boss also asks for a secretary-chief connection. I am an ordinary system administrator in telephony, a complete zero, tell me where to dig what you need, maybe something to read, in a complete stupor.

Answer 1

Virtual PBX
For example:
https://www.mango-office.ru/products/virtualnaya_ats/

Answer 2

Calculate a few options, the idea of ​​\u200b\u200bATS is not so bad, especially in your reality.
1. Calculate how many employees talk to each other: this traffic does not need to be given to the city, but driven inside your own PBX.
2. Calculate the real load on the local incoming/outgoing pool, perhaps reduce the number of analog trunks from 30 to 5, and make an internal redirect through the extension/secretary.
3. Explore buying from a local operator SIP or E1 stream, they are usually cheaper to maintain the line.
4. Find a cloud provider through which you can throw trunks to an area / region, calculate the feasibility and possibilities.
Your main task is to reduce external traffic as much as possible, and also try to launch intercity via the Internet, and not through the Rostelecom exchange, although if the entire channel of the city goes to the satellite, then they may prevent this.