I shouldnt have thought you'd see the "extension" number,
you will see the originating CLI, eg
0191 222 2000 rings
0207 100 1000 (extension 1000 ddi number)
1000 ECF to mob. 07952 777777
mob will see 0191 222 2000 or PUBLIC or NETWORK
wont see 0207 100 1000 or 1000
if thats what I think your asking.
I think its because even though the MD has ECF'd the call, the call has not been made from 1000 but has a trunk to trunk transfer via the original 0191 call.
somone may proove me wrong, but thats what I would expect !
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