DNIS is the digits you receive coming in on your trunk so what ever you send across the SIP the receiving switch will display all of the received digits as the DNIS. You can set the lenght on the RDB but this will not affect the DNIS, we had a case where we receive 7 digits off SIP but only wanted to display 4 we set DNIS YES and NDGT 4 but applications still display all 7, Nortel said that this is correct and by design.
I am doing that, and I can see in my D channel and SIP trace that the called number is my 4 digit number only. and its very normal. but is there any other way from where i can see what my outgoing number is for the SIP calls, other than the D channel and SIP trace.
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