Thread: CharlieCards v.v. Oyster (and Octopus?)
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Old April 3rd 12, 10:26 PM posted to uk.railway,uk.transport.london,misc.transport.rail.americas
Stephen Sprunk Stephen Sprunk is offline
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Default Telephone line numbers, prefixes, and area codes
On 03-Apr-12 14:49, Adam H. Kerman wrote:
Stephen Sprunk wrote:
PBX trunks aren't numbered.

If outbound trunks aren't numbered, how does ANI work?

For a trunk, both called and calling number are explicitly signaled at
the start of each call in either direction.

Inbound calls to a number (or set of numbers, eg. DID) are routed to any
available trunk in the trunk group.

S

--
Stephen Sprunk "God does not play dice." --Albert Einstein
CCIE #3723 "God is an inveterate gambler, and He throws the
K5SSS dice at every possible opportunity." --Stephen Hawking
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