atcomsystems.ca/forum Forums TDM Business Telephone Systems Mitel Telephones & Systems Caller ID on SX 200 ICP

First, make sure the carrier is actually delivering Caller ID to you.
Next, go to form 13, Trunk circuit descriptors.
Find the circuit descriptor for the trunks on your analog/ASU card, and choose 'select options'.
Look for the option "CLASS Trunk" and set it to enabled.
If the Caller ID doesn't display, go to the COS of the console, and make sure option #502 is enabled.