Telephony external id in Zoho Desk

Telephony external id in Zoho Desk

Hi,

We are looking for a way to get the external telephony id in ZohoDesk.
I see that Zoho CRM already has this feature: https://help.zoho.com/portal/en/community/topic/telephony-external-id-field-added-in-crm

But my customer doesn't use crm. Only ZohoDesk.
Is there any way to get this in ZohoDesk included on the call layout?