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|.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 E-Mail, 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) 3914866(user)
The phone changes the number into a Domain and a DNS-Request is starting in an IP-Network (WAN). e.g.: 6.6.8.4.1.9.3.1.6.3.4.9.E164.arpa
In the result of DNS-Query could be found some resource records from registration and the handling of incoming requests for e-mails, 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
10 10 u E2U+tel !^.*$!tel:+493613914866!. ^ Order:
If you have the some "Order"-number, the preference will be call up at first.
|.What is a NAPTR RR
10 10 u E2U+tel !^.*$!tel:+493613914866!. ^ Flags:
Controlling and transformation of the requested- system (e.g. phone) to an URI
|.What is a NAPTR RR
10 10 u E2U+tel !^.*$!tel:+493613914866!. ^ Service:
protocol of requested service and resulotionservice for SIP (DNS-DNS) and E164 (PSTN - DNS) to an URI
|.What is a NAPTR RR
10 10 u E2U+tel !^.*$!tel:+493613914866!. ^ Regexp:
regulary term for transformation of the request
|.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 (3914866, …)
|.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 / 3914866 )
|.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.: 6.6.8.4.1.9.3.1.6.3.9.4.E164.arpa
|.Possibilities of ENUM Networkelements could be found about one number
Services could be found with one number about DNS > E-Mail, 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.
|.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