Auto attendant with Unity connection not routing calls to few extensions

[ashwincjoshi1]

Hi

I am a part of network voice team in my company.

We have a unity connection system installed at one of our sites and we have made our main site number to land on a Unity connection ( Calls routed to land on a call handler ).

As the call lands on unity connection it gives a message to dial the extension number along with some other caller input options (like for directory inquiry dial 0 ). This arrangement is working fine except for few extensions. 

We have an extension if we dial that extension during the Call handler greeting the system says " The call can not be completed as dialed Please check the number ". This extension is programmed as a Voice mail user in Unity, secondly this extension is not a physical phone but a CTI port.

Call flow--
Calls to main number routed to -------> Unity connection Call handler ------> Unity connection ask to enter the extension --------> User enters extension number as 300 ------->Unity says " The call can not be completed as dialed please check the number".

Ext 300 is programmed as CTI port in call manager and is forwarded to some other extension thru forwarding option in line settings

Please suggest how to get this diagnosed.

Thanks in advance

Ashwin

[Jaime Valencia]

Check the CSS for your CUC->CUCM integration.

[kkoeper12]

In addition to Jaime's good suggestion to verify the SCCP ports or SIP trunk to CUC has a CSS that can reach the extension you can also check the box on the Call Handler greeting to allow transfers to unknown extensions and verify that the Restriction Table for Default Transfers allows transfers to that extension.