ECRIT IETF 62 (March 2005) draft-arai-ecrit-japan-req 1

Emergency Call Requirementsfor IP Telephony Services in Japan

draft-arai-ecrit-japan-reqHideki Arai & Motoharu Kawanishiarai859@oki.com kawanishi381@oki.com

Oki Electric Industry Co., Ltd.

ECRIT IETF 62 (March 2005) draft-arai-ecrit-japan-req 2

Background

Requirements shown in this draft are based on the draft report from the Ministry of Internal Affairs and Communications (MIC).http://www.soumu.go.jp/joho_tsusin/eng/Releases/Telecommunications/news050128_7.html

This report focuses on VoIP especially, because the IP telephony service with E.164 number has spread rapidly as an alternative to PSTN telephone. Video, text, data etc. are still further study.

Citizen’s point of view: Emergency call of IP telephony services should be equivalent to the traditional emergency call, 110 for the police, 118 for the coast guard, and 119 for fire and ambulance.

Emergency call acceptance organization’s point of view: It should be easy to migrate from the existing system to IP telephony system. And IP telephony environment should provide the same functionalities as the PSTN environment.

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PSTN

Traditional Emergency Call

Local Exchange Office

Subscriber

Local Exchange Office

PolicePolice

Fire & AmbulanceFire & Ambulance

Coast GuardCoast Guard

52 offices

Approx. 900 offices

11 offices

ISDN

ISDN

ISDN orAnalog leased line

*: To acquire the reporter’s address,each office has also lines for data communication with operators.

Translating dialed 11x into the telephone number of the correct office that covers the area where the reporter resides

Presenting reporter’s address based on caller-ID.Acquiring reporter’s caller-ID and address from the operator if the reporter called by CLIR (*)

Getting emergency call to correct office

Presenting and acquiring geographical location information

The highest priority must be given to emergency calls

Taking priority over all other calls

Keeping call connection unless the office terminated the call

Keeping connection

Allowing offices to acquire caller-ID even if the reporter called by CLIR

CLIP oracquiring caller-ID

ECRIT IETF 62 (March 2005) draft-arai-ecrit-japan-req 4

Assumed Network Model

Two types of network configuration Emergency call reception office is connected to IP network

via PSTN using existing emergency line, and Connected directly to IP telephony network via a new IP

lineBut VoIP only at this stage

Subscriber PSTN Subscriber

Office Office

*: Each office uses another line (e.g. IP-VPN) for acquiring the geographical location information of the reporter from an operator.

IP　network

IPnetwork

PSTN model All IP model

ECRIT IETF 62 (March 2005) draft-arai-ecrit-japan-req 5

IP Telephony Requirements for Emergency Messages in Japan (1) Connection to ECRO

PSTN: Voice thru ISDN, and GLI thru wide area ethernet. All IP: Voice thru VoIP network, and GLI thru wide area ethernet i

mmediately and thru the same network as Voice in the not-too-distant future.

Getting Emergency Message to Correct ECRO Emergency call MUST be got to the correct ECRO, which covers

where the reporter is present. Emergency call MUST be redirected to an alternative facility that

the organization designates as an alternative reception office, in case the original ECRO could not do its duty due to a disaster etc.

Information for identifying the operator who can provide the reporter’s subscription information MUST be presented to ECRO.

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IP Telephony Requirements for Emergency Messages in Japan (2) “Keeping connection” and “Reversing call”

Emergency call MUST NOT be terminated unless ECRO terminated it, even though the reporter hung up.

Reporter’s terminal MUST be rung up from ECRO if ECRO intends to resume the conversation with the reporter during “keeping connection” would be activated.

Presenting and Acquiring Calling Line Identification Reporter’s caller-ID MUST be presented to ECRO unless

the reporter dials the restriction code followed with “11x”. ECRO MUST be allowed to acquire the caller-ID even

though the reporter dialed with the restriction code.

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IP Telephony Requirements for Emergency Messages in Japan (3) Presenting and Acquiring Geographical Location Information

GLI that the reporter is present MUST be presented to ECRO. GLI MUST consist of

Fixed IP-phone: subscriber’s name, address, address code and telephone number

Portable/Mobile IP-phone: subscriber’s name, place of dispatch information, telephone number, and mobile-use or not.

Priority over other calls Emergency call MUST have priority over all other calls in any

case. Preventing spoofing

Operator MUST prevent a malicious call pretending the place of dispatch.