How to set up outgoing number detection (ip-telephony)?

Question

Telephony

Given:
direct number in code 495, taken from Alloincognito;
sip-operator Optimatelecom.
Problem:
earlier it was configured so that customers determined our number at their place.
Recently, the legislation has changed and now Optimatelecom cannot technically show our number, i.e. clients have a PBX number and cannot be reached by phone.
Question:
how can we set it up so that our number in the 495 code is determined, taking into account this fucking law?

Answer 1

- purchase a trunk from an operator that has its own numbering capacity, but this will entail a number change.
- purchase a trunk from the operator providing the cli when terminating to the territory of the Russian Federation.

Answer 2

Well, the person above is correct. You don't really have any options. Either hammer your operator and ask for a CID substitution, or change the operator. :) Technically, your operator can do this, just apparently does not want to. If you think legally, then yes, this is probably a somewhat "gray" scheme, but many make concessions to clients.
Don't take it as advertising, but recently we have been taking a trunk for 4 lines from new-tel.net, with 499 numbers it costs only 950 rubles per month, which is also inexpensive. Upon request, they agreed to substitute another CID (our other number in the 495 code) for outgoing calls. And for incoming calls on our 495, there is an unconditional forwarding to their 499. We have been using it for a week, the flight is normal. The only cant with CallerID when entering, for some reason they cut off the prefix 8 for Russian numbers, they promised to fix it in the near future. :)