Assign a test SIP Trunk to a DN in CUCM

our company use a cisco call manager version 8.6 and lately I was asked to test a new SIP trunk for outbound calls.
for a test purpose I was thinking to have a specific phone extension use this test sip trunk only. Is this something that can be done in CCUM?  

thank you
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Which Cisco device is in use?
ggRM7865Author Commented:
We use Cisco 8945 as phones.

thank you
The Cisco phone system where cucm is running?
Are you using the cli or a GUI interface to configure the Cisco phone system

what is the current feed?
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ggRM7865Author Commented:
we use a GUI interface (see pic).

thank you.
See the reference link previously posted , call routing. Look at the existing rules the. Add a filter/rules that detects the calling and based on that redirects the routing of the X all via a different path.

It might be simpler to work out the handling of the incoming call over the new sip trunk if not done, and then work on the reverse.

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IP Telephony

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