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Basic Norstar Programming

How do you setup destination codes on a PRI system to route Emergency 911 calls over copper trunks? by cowenby
Posted: 30 Nov 03


This topic should be considered an Advanced Norstar Programming technique.

This FAQ assumes a Modular ICS with a 6.1 feature cartridge and digital trunk interface connected to an ISDN-PRI.

Program the line type for two or more copper trunks (lines) to Pool A.  By default, all stations should have access to Line Pool A, it is important to verify this in programming.  Also, check to make sure Route 001 uses Pool PRI-A.

Note that the dialing string 911 is included as both a restriction and an override in the initial defaults for restriction filter 01. This arrangement prevents anyone from blocking calls for emergency assistance on lines or sets using the default filter.

Add destination codes as follows:
DstCode    Rte    Absorbed
90    001    1
910    001    1

911    000    0
Note: 911 is the only dest code with zero absorbed digits

912    001    1
913    001    1
914    001    1
915    001    1
916    001    1
917    001    1
918    001    1
919    001    1
92    001    1
93    001    1
94    001    1
95    001    1
96    001    1
97    001    1
98    001    1
990    001    1
9910    001    1
9911    000    1
9912    001    1
9913    001    1
9914    001    1
9915    001    1
9916    001    1
9917    001    1
9918    001    1
9919    001    1
992    001    1
993    001    1
994    001    1
995    001    1
996    001    1
997    001    1
998    001    1
999    001    1

Always test each of the destination codes by placing test calls, especially 911 and 9911.  Also verify the calling number and street address with the 911 operator when placing the 911 test calls.

Back to Nortel: Norstar systems FAQ Index
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