How to configure forwarding on Cisco CUCM 9?

Question

Asterisk

Good afternoon,
I have the following configuration:
telephony provider --> E1 gateway with several numbers --> CUCM 9.1.2.10000-28 --> Asterisk
Now in letters:
There is an old CUCM that serves the E1 stream from the gateway and a bunch of phones.
There is an Asterisk connected by a trunk with CUCM. Calls go in both directions
. There is also one number wrapped directly to Asterisk from the gateway
. There is a need to wrap one of the numbers from CUCMa to Asterisk. I understand that you can throw this number into the trunk directly to Asterisk, but they asked me to do this only as a last resort.
In CUCM, I'm not a great specialist, maybe I don't see something that lies in plain sight?