Failed connection when try a Telnet (p:23) session

When I try a "port 23" session I got the the following messages:

15:28:38 debug1: ssh_exchange_identification: User Access Verification
> 15:28:38 debug1: ssh_exchange_identification:
> 15:28:38 debug1: ssh_exchange_identification: Username: SSH-2.0-OpenSSH_7.9
> 15:29:08 debug1: ssh_exchange_identification: Password:
> 15:29:10 ssh_exchange_identification: Connection closed by remote host
> 15:29:10 Abnormal Disconnect
> 15:29:10 Connection failed, retry after 3s…

NOTES:
.- I set in the "host general setting" in the "user" field: admin.
.- When I try with another telnet client, it works.

Is there any parameter that I have to set in settings to make it work ?

Armando, Core Shell does not support Telnet protocol at this moment.

Hello

Do you have support for TELNET?

We do not have such plan at this moment, we will consider it in future.

Yang