Nortel Networks SRG50 manual Emergency Services Access ESA configuration

42Chapter 4 CS 1000 considerations

cEnsure that the DN Type is Public (Unknown).

dIn the External Number field, enter the NPA-NXXX of the DID trunks that serve the main office.

eAssign the PSTN line pool to the route (select the line pool from the Use Pool list; default is A).

4Add a destination code.

a Access the Dialing Plan - Routing panel (Configuration > Telephony > Dialing Plan > Routing) and select the Destination Codes tab.

b Add a new destination code.

Use the ALTPrefix as the destination code.

cOn the ALTPrefix Destination Code row, select the Normal Route field.

dEnter the route for the route added above (996).

eIn the adjacent Absorbed Length field, select 3 from the list.

When the SRG receives the ALTPrefix+DN digits from the main office, it looks up the destination code table, finds a match for the ALTPrefix, dumps the 3- digit ALTPrefix, appends the DN to the External Number and dials the External Number+DN.

Emergency Services Access (ESA) configuration

The Main Office Configuration for Survivable Remote Gateway 50 (NN43001-307) guide covers the procedures for configuring Emergency Services Access on both the SRG and the CS 1000. The information here expands on the SRG procedure in that guide.

There are two methods of ESA support:

•When a user dials 911, the telephone is redirected to the Branch Office and connects to the SRG in local mode. The Main Office indicates the reason for redirection (as e911) in the DRAM. The SRG dials 911 across the PSTN. The telephone remains in local mode after the 911 call and is redirected to the Main Office after 10 minutes.

•On-site notification for 911 — An external tool records an alarm when 911 calls are made at the branch office. This is applicable to both telephones that are in local mode due to the activation of a 911 call as well as locally connected analog sets. The external tool connects to the SRG through LAN CTE.

Note: This procedure applies only to redirected IP telephones when the

SRG is in normal mode.

For IP telephones in local mode, and for other telephones at the SRG, see the Networking Configuration Guide (NN40020-603) for configuring emergency services.

NN40140-500