[Asterisk-biz] Termination on PRI Lines

[alex at pilosoft.com]

On Sat, 10 Dec 2005, Derek Conniffe wrote:

> Hi Jerry,
> 
> I've come across a major "restriction" (perhaps the only one?) with PRI
> E1 (T1?) vs. SS7 interconnects: the PRI connections do not offer network
> id transfer.  It means that you cannot determine what network has
> contacted you.
True, on SS7, you get pointcode of the calling switch. 

> Normally this may not matter but, here anyway, it becomes very important
> with determining what the "subsidy" charge is when receiving freephone,
> or similar, calls.  Strangely in Ireland the highest subsidy is charged
> when receiving calls from pay phones (higher than mobile phones & land
> lines) - its nice to be able to do a Hangup based on the network id.
Not exactly true. You can get ANI2 on a PRI in US. ANI2 will inform you
whether the call is coming from a payphone etc.

-alex