Nortel DMS-100 Enhanced 911 Public Safety Answering Point (E911PSAP)

Table Name

Enhanced 911 Public Safety Answering Point

Functional Description of Table E911PSAP

Table E911PSAP associates a Public Safety Answering Point (PSAP) name with a local Directory number (DN) or an Emergency Directory Number Route (EDNR).  EDNRs are used for call transfers or routes to emergency agencies that are not E911 line or Line Appearance on a Digital Trunk (LDT) PSAPs, or are not served directly by the E911 tandem switch.

In order to selectively route or transfer an E911 call to an EDNR, the agency name and number to be dialed for the agency must be datafilled in table E911PSAP.  The PSAP name assigned to the EDNR must then be datafilled in table E911ESN.  An EDNR can be datafilled as a primary or secondary PSAP.

Entries in table E911PSAP are datafilled automatically by table HUNTGRP (Hunt Group) when either the LDTPSAP or LINEPSAP option is assigned to a hunt group through the SERVORD system to create a PSAP.

The field EDNR (Y or N) appears in table E911PSAP to distinguish EDNR entries that are datafilled directly in table E911PSAP from PSAPDN entries that are datafilled automatically through SERVORD.  EDNR tuples are entered using the table editor.

This table contains a default tuple, NONE $, that is always present and is used in table E911ESN if no secondary PSAP exists.  The $ (dollar sign) entry indicates that there is no DN associated with this PSAP.  An entry in this table can be deleted only if the name of the PSAP to be deleted is not referenced by table E911ESN.

Emergency Directory Number Routes

Every PSAP, primary or secondary, that terminates on an E911 tandem must be datafilled in table E911PSAP.  An entry in this table must contain the exact digits necessary for a PSAP to "dial" to transfer a caller to the proper destination.  This is especially important for E911 tandems that serve more than one Numbering Plan Area (NPA).  It may be necessary for a PSAP in one NPA to transfer a caller to a PSAP in another NPA.

An EDNR must be added to table E911PSAP to handle the above situation.  PSAP DNs can be stored as seven or ten digits.  The tuple required for this may include a digit string such as 1 + 7-digit DN or 1 + 10-digit DN of the destination PSAP.  A similar situation may occur if PSAPs are datafilled as part of an IBN group that requires an access code (that is, a "9") to be dialed before transferring a call outside the IBN group.

When one of these options (LINEPSAP, LDTPSAP, ACDPSAP, or PRIPSAP) is assigned or modified, a prompt for a "Y" (yes) or "N" (no) to a field named NATLXLA appears.  When the value of NATLXLA is "Y", PSAPDN in this table is ten-digit.  When the value is "N", PSAPDN in this table is seven-digit.  If your office does not support the appropriate seven- or ten-digit translations, the change of value of NATLXLA field when modifying an existing PSAP can cause problems in completing 911 calls to that PSAP.

An EDNR can be any valid DN within a DMS switch.  For example, it could be a 1FR, a MADN, or an ISDN line.  An EDNR can also be a special translations DN that points to some type of office route or trunk group.

Table DNROUTE (Directory Number Route) is used in conjunction with EDNRs when it is necessary to use a PSAP to route an E911 call out of the office (tandem-to-tandem routing).  A DN may be datafilled in this table that points to a tuple in a routing table that will take the 911 call out of the office to either another E911 tandem or an agency that resides outside of the first E911 tandem.

Datafill Sequence

The following tables must be datafilled before table E911PSAP:

Table E911ESN must be datafilled after table E911PSAP.  Table size is 0 to 7,000 tuples and there can be a maximum of seven PSAPs serving an Emergency Service Zone (ESZ).  An E911 tandem can serve a maximum of 15,999 ESZs.

Datafill

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Table E911PSAP Field Descriptions

Field       Subfield       Entry                       Explanation and Action
----------------------------------------------------------------------------------------------
PSAPNAME                   Alphanumeric (1 to 16       Public Safety Answering Point Name
                           characters)                 Enter the name of the Public Safety 
			                               Answering Point (PSAP) offering services.
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PSAPDN                     Numeric (18 digits)         Public Safety Answering Point DN

                                                       Enter the Directory Number (DN) of a line
						       PSAP, Line Appearance on a Digital Trunk 
						       (LDT) PSAP, or Emergency Directory Number
						       Route (EDNR).  The default is "$".

                                                       When one of these options (LINEPSAP, 
						       LDTPSAP, ACDPSAP, PRIPSAP) is assigned or
						       modified, a prompt for a "Y" (yes) or
						       "N" (no) to a field named NATLXLA appears.
						       When the value of NATLXLA is "Y", this 
						       field is 10-digit.  When the value is 
						       "N", this field is 7-digit.
----------------------------------------------------------------------------------------------
EDNR                       Y, N                        Emergency Directory Number Route
                                                       Enter "Y" (yes) if an EDNR is used. If 
						       table E911PSAP is datafilled through 
						       table HUNTGRP, this field automatically
						       is set to "N".  If set to "N", tuples 
						       cannot be changed or deleted.
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-End-



Datafill Example

The following example MAP display shows sample datafill for table E911PSAP.


PSAPNAME     PSAPDN        EDNR
_______________________________
NONE         $             N
CARYPOLICE   4691235       N
NRESCUE      19195585219   Y