How do I store the incoming number when transferring from machine to machine (Cisco SPA504)?

Question

Asterisk

There is such a problem ...
An incoming call comes to the manager. The manager needs to transfer the call to another manager. When the first one transfers, the second manager sees the extension number of the first one on his phone, and not the number of the incoming call.
How can this be fixed?
I dug through all the settings, but did not find how to fix it. Tell me who is in the subject.
The devices are connected to the server on Asterisk.

Answer 1

What call transfer mode is used? Attended transfer, for example, hangs up an incoming call on hold, organizes a new call from the first one to the second phone, and after hanging up on the first phone, it removes the incoming call from the hold and connects it to the second phone. In this case, the call from the first to the second phone is organized on a separate channel, and nothing is known about the number of the incoming phone on this channel.