In message
<[log in to unmask]>,
at 15:18:23 on Thu, 9 Feb 2006, "Hitches, John F"
<[log in to unmask]> writes
>The 1000 extensions (or whatever) connected to the 20 trunks do not
>communicate DDI numbers (which relate only to incoming calls) through
>the trunks to the telephone exchange. The latter only knows which trunk
>it has received the call on. Similarly your extension number is not
>transmitted.
No, the PABX can, and often does, send a CLI corresponding to the
extension number to the exchange for onward transmission to the called
party.
What I'm speculating is that such a facility may not always be 100%
integrated with the ability in a more complex system for the user (and
his DDI number) to roam within the building from day to day.
--
Roland Perry
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