[cisco-voip] PRI Protocol NAT1, NAT2, custom?

[Jeff Ruttman]

Greetings,
 
We're putting in a Verizon PRI at one of our offices.  They're asking
what Protocol we want, NAT1, NAT2, or custom.  I believe this has to do
with caller ID, and that "NAT" stands for National.  Any insight into
what I should choose?
 
On our existing gateways with PRIs, the dropdowns in Call Routing
Information where I could choose "National" we have chosen "Cisco Call
Manager."
 
Thanks
jeff
 
 
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