|. Introduction  Quality needs time in education as in science – to teach more about new technologies – to find new services in the IT-landscape – to develop new products and services – to find group of interests … time is a factor for quality. So we are sorry to get slowly access for the ENUM-Trial, to present to you.

|. Index and themes  What is ENUM ?  How is ENUM working ?  What is a NAPTR RR ?  Which numbers could be registered ?  What is an E.164 number ?  What is an E164.arpa Domain ?  Which possibilities could be realized about ENUM ?  Who can use ENUM ?

|.What is ENUM  What means ENUM ?  ENUM: electronic telephone number mapping  telecommunication- and internetservices could be connected about this protocol.  ENUM gives instructions to build telephone-numbers as a domain in RFC2916-Protocol of the ICANN  the „ENUM“-Domain can provide different services by using the DNS (for , websites, Unified messaging)

|.What is ENUM  An "ENUM"-Domain can manage different services of telecommunication like:  GPS  GPRS  Fax  Voice-communication  mobile communication  and can assign them to different enddevices

|. How is ENUM working  Enter a number by an ENUM-supported telephone  e.g.: +49(country) 361(area-code) (user)  The phone changes the number into a Domain and a DNS-Request is starting in an IP-Network (WAN).  e.g.: E164.arpa  In the result of DNS-Query could be found some resource records from registration and the handling of incoming requests for s, calls,…  The called person can talk now through PC to the PSTN, or redirect the call automatically to a mailbox or an other configured service in DNS or PSTN

|. What is a NAPTR RR  NAPTR is an entry in a Domain Name System (DNS)  NAPTR RR:  Naming Authority Pointer Resource Record  With NAPTR you can decide how to handle with requests.  You can switch calls with SIP (Session Initiation protocol) to the configured address.

|. What is a NAPTR RR  u E2U+tel !^.*$!tel: !.  ^ Type: Name of Resource Record

|. What is a NAPTR RR  u E2U+tel !^.*$!tel: !.  ^ Order: If you have the some "Order"-number, the preference will be call up at first.

|. What is a NAPTR RR  u E2U+tel !^.*$!tel: !.  ^ Flags: Controlling and transformation of the requested- system (e.g. phone) to an URI

|. What is a NAPTR RR  u E2U+tel !^.*$!tel: !.  ^ Service: protocol of requested service and resulotionservice for SIP (DNS-DNS) and E164 (PSTN - DNS) to an URI

|. What is a NAPTR RR  u E2U+tel !^.*$!tel: !.  ^ Regexp: regulary term for transformation of the request

 For e164.arpa |.What is a NAPTR RR

|. Which numbers could be registered  The DeNIC e.G. allows to register following numbers which consist of allowed:  geographical numbers (e.g.: +49, +43, +81, …) +  area code (e.g.: 69, 361, 341, …)  code of networks for cellphones ( 15x, 16x, 17x) +  telephone number ( , …)

|. Which numbers could be registered  The DeNIC e.G. allows also to register following numbers:  national freecall numbers (0800)  national personality numbers (0700)  other serviceline codes like 0180,… will be accept in future of the pilot-project

|. What is an E.164 number  It is a recommened type of international telephone number  An E.164 number consist of an uniform principle:  the fixed area code for countries (Germany is +49)  an area code in the country  the number of user of the PSTN  the E.164-number is a decimal type and is acceptet to an maximum lenght of 11 numbers  Area code + local code + max. 11 numbers  ( +49 / 361 / )

|. What is an E164.arpa Domain  Arpa is a Top-Level Domain which can be reached about all Root-Servers and is managed by RIPE  E164.arpa is a Second-Level Domain for ENUM  9.4.E164.arpa is the ENUM-Domain for Germany and is controlled by DeNIC e.G in Frankfurt/Main  Service-providers like T-Systems offers numbers for customers, e.g.: E164.arpa

|. Possibilities of ENUM  Networkelements could be found about one number  Services could be found with one number about DNS > , GPS, Voice-Communication, Fax, Mailbox,…  The User can define the handling of requests, well known of 0700-Services  creating a solution to connect PSTN with persons who uses Voice over IP  with ENUM numbers also older phones can be connected to users in Internet

|. Who can use ENUM  private persons who would like to know more about this.  ISP's who want to make profit with this service.

|. See some demos  Login to trial-domain.

|. See some demos  Edit NAPTR.

|. See some demos  Edit local SIP.

|. See some demos  View a call history.

|. See some demos  Call and view a call history.

|. See some demos  Call about SIP.

|. See some demos  Incomming call.

|. See some demos  called false number.

|. How to get a ENUM-Domain.  1. You must be owner of phone-number  Mobile phone  Service line  2. Request an ENUM-Domain  T-Systems Berkom GmbH, DeNIC, Mobilcom, noris network GmbH  There are more as 100 test operators  3. Documents  Bill with owner  Driving-license with address or identity card

|. How to get a ENUM-Domain.