You need to speak with your Telco provider. Make sure all of your DIDs are registered with a CNAME server. Provide Telco with the correct names for each DID. This will give the correct CLID Name information for your numbers. If you want specific user's to have specific display then provide this to Telco in the list of DIDs. Depending on Telco configuration a CNAME lookup will override what is sent from CCM, so this is the most thorough way to do this.
You can also set CallManager not to display CLID Name outbound. Go to your gateway and uncheck Display IE Delivery on the PRI. This will disable outbound Calling Name.
The Telco is configurd to send the company name and the main DID number. However, we have a legacy PBX and a CCM. When it's a PBX phone, the company name and number is sent. But when it's an IP Phone, the Display name in the CCM is sent, it overrides the Telco config or I should say, it respects what the CCM is sending.
Now, I'm wondering what's the difference between unchecking the Display IE delivery in the PRI configuration on the GW and configuring the Calling Name Presentation to "Restricted" in the Route Pattern ??
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