
Do you do internet service in Russia? Then almost always most of the clients will be located in Moscow and St. Petersburg. For Habr, for example,
this is 54% .
It is more convenient for buyers from both capitals to call local landlines.
How can you improve the solution of this problem?
What they wanted- Opportunity in case of moving to take your phone number with you
- For the trust site is important direct city number
- A couple of incoming lines - now, scaling later
- All the joy of working with digital lines (recording, forwarding, blah blah blah)
- Reasonable price calls to the regions, including mobile phones.
+ desirable- Relatively beautiful room
- Moscow number 495, not 499
- Less monthly subscription
There was also a dreamFind the same city phone number in St. Petersburg and in Moscow.
Viewed a bunch of sites, heard very convincing reasons why it is difficult and expensive.
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What did in the endTwo lines of SIP + Asterisk + two identical direct numbers (812) 640-07xx and (495) 640-07xx.
This solution is comfortable for buyers from both major cities. We have 80% of buyers.
Incoming calls from any number are placed in a common queue.
Outgoing calls are made as follows:
On phones with code 495 and 499, we call from the Moscow number,
for all the rest we do from St. Petersburg number.
Calls to mobile phones (the code starts at 9) are as follows:
A request to the database of orders left on the site checks which city has been selected for delivery.
If the city is Moscow or in the Moscow region, then the Moscow direction is chosen.
In all other cases - calls from St. Petersburg numbers.

It’s done this way because there is no reliable base for binding the mobile operator’s code to the city. In addition, Russia promises to keep the phone number when changing the cellular operator.
In the following article:
Retail vs online store