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Originally Posted by avayapbxuser
Thanks for the refresher 101 course. I understand the basics.
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Sorry, but from the question you posted (How are the DNIS digits being directed to the Megacom trunk group...) I rather assumed that you did not understand routing based on digit analysis.
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Originally Posted by avayapbxuser
Our LD provider is telling us that they are sending DNIS digits of 2xxx to our PBX, at that point we determine what trunk group it rides over;
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You are responsible for telling telco
how you want your trunks to be used, so that they can be programmed for that purpose
. In the case of your MEGACOM service, you have to tell the provider
which T1's to use - so that you know which T1's the calls will be terminating on. This is different from deciding
which trunk will be used on a call.
The
sending switch is responsible for selecting the available trunk. If the other end (receiving) has no issues with using that trunk (e.g., glare or OOS condition)
then that trunk is used. If it is not, the sending side will follow it's own protocol for either re-attempting on a different trunk or tearing down the call.