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emergency_calling_features.fm
A31003-H8022-F100-2-7618, October 2006
HiPath 8000 V2.2, Feature Description Guide
8-5
Emergency Calling Features
Guidelines for Implementation and Use
8.3.2 RG 8700 Gateway
When the RG 8700 gateway is used:
1. The HiPath 8000 signals the user’s calling party information to the gateway. When it sends
the user’s LIN, the signaling is performed in accordance with the CorNet-NQ protocol. The
HiPath 8000 sends the LIN in the SIP body in the clear to the RG 8700.
2. The gateway converts the LIN to the 10-digit NANP CAMA MF format.
3. The gateway uses a CAMA trunk to transmit the LIN to the local PSAP.
8.3.3 Cisco Gateway
When the Cisco gateway is used:
1. The HiPath 8000 uses a SIP-Q interface to deliver the CPN to the Cisco gateway.
2. The Cisco gateway uses 2-wire FX trunks to send the LIN or CPN to the Telident STS. The
number is sent via DTMF tones.
3. If the Cisco gateway sends the LIN to the Telident STS: The Telident STS converts the
LIN to the 10-digit NANP CAMA MF format.
If the Cisco gateway sends the CPN to the Telident STS: The Telident STS matches the
public network number with the LIN in its database.
4. The Telident STS uses a CAMA trunk to transmit the LIN (and CPN, if available) to the local
PSAP.
8.4 Guidelines for Implementation and Use
The emergency number digits (such as 911, 9-911, or another pattern based on country
requirements) are administered in the business group’s dialing plan. The digit pattern is
flagged as an emergency number.
If the LIN is administered in the Telident STS: This feature relies on the calling party
number of the caller to determine the LIN; therefore, it is viable only for emergency calls
placed from devices that have a static or fixed location. The Telident STS database must
be updated whenever a telephone is moved from one location to another. The customer is
responsible to ensure local E911 regulations are followed with respect to device labeling.
Siemens gateway: If an on-site operator is not used, the HiPath 8000 administrator must
ensure that emergency calls are correctly routed. Although the Siemens gateway itself
need not be in the same jurisdiction, it must be able to route the call to a gateway or Telident
STS that is.
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