Is there a simple equipment for forwarding a landline call to another number on a schedule?

Question

Telephony

Good afternoon. There is apartment A and apartment B. Both here and there are ordinary city telephony. It is necessary for a person to come to apartment A, answer the calls, press the button in the evening and the calls begin to be forwarded to the number of apartment B. So far I see the decision to buy a mini-ATS, but it is somehow expensive. Maybe there are fancy home phones that can receive calls and call the specified number, thereby transferring the call?

Answer 1

I guess not, because. the city line is most likely designed for 1 connection, and call forwarding will require a 2nd line.
But I suppose there are some models of sip phones that can receive an incoming analog line and forward it to another sip phone.

Answer 2

I guess not, because. city ​​line, most likely designed for 1 connection

Damn. Exactly. I have not used this telephony for so long that I even forgot what it is. Probably it is necessary to address to an ip-telephony.