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Originally Posted by penelope
No, the systems are all across the US. Avaya believes it is the type of switch on AT&T's side.
The circuit is a little different than any other circuit I have on any system. It was a T1 and we installed an ISDN PRI and ported the DIDs over to it. It is not a local T1, can still do DNIS on it. Just strange how AT&T built it.
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I think you may have missed my point.
Think about it this way. Telco is providing E&M signalling on the trunks at one of your locations. How do you program the trunks on your side? But at another site, the telco is providing loop start signalling. How do program
those?
The trouble you saw was due to a mismatch between the
protocol versions running on the AT&T and local premise switches.
They have to match in order to communicate. But it does not mean that all switches are going to speak the exact same language - nor do they have to.