Extension Name does not appear when dialed from Cisco Phone

[syadmins]

We are using cisco phones, everything is working perfectly with 3cx, However, we are facing an issue and we are wondering if anyone has a fix for it.

Problem Description
When John (1000) dials Alice (1001), Alice's name does not appear on John's phone screen (Only his extension appears, I.E 1001). This issue is shown on all of our cisco and non-cisco phones. However when we revert back the phones to CUCM (Cisco Call Manager) the problem is no longer there.

Used Phones:
Cisco 7942, 7961, Planet VIP-1120

Any idea on how to fix this issue?

 

[leejor]

My understanding, is that for this to happen, the number, along with the name, must reside in the phone, whether this be a downloaded directory, or is possibly retained from a previous incoming call, from that extension. How the Cisco Call manager does it, I do not know. Directory database query?