Telecom Signaling Networks

1

• Telecom Signaling Networks
• and Service Forum
• January 17, 2006
• Amsterdam

2
I am Adrian Georgescu

• I am a bachelor of electrical engineering
• Member of ETSI ENUM task force
• Member of management board of OpenSER project
• Co-chair of ISOC NL SIP Working group
• Founder of AG Projects

3
AG Projects delivers simple SIP and ENUM
solutions that delivers today what IMS promises
it will deliver tomorrow
4
The opinions expressed in this presentation
belong to myself, my company and most of my
friends
5
Numbering and addressing in NGN Business models
around ENUM
6
For those who don't know NGN is the Internet
7
Even if you dont agree with it
8
All IP means the Internet
full stop.
9
From the old PSTN ONLY the E.164 numbering plan
remains
10
SS7, ISDN, MTP, SCP, SP, TCAP, ISUP, MAP, IN all
go away
11
And you migrate to all IP, SIP based
communications
12
Using the big, bad, ugly Internet
13
No QoS, no guarantee, no central control, no
regulation, no monopoly
14
Internet, a dumb network
Its role is merely to deliver packets from A to B
15
The services (applications) are performed at the
edge and not in the center
16
DNS is the only centralized resource on the
Internet
17
DNS (Domain Name System) provides naming and
addressing for the Internet
18
Internet is different than the PSTN
19
In PSTN the intelligence is at the center and
the end-device is dumb
20
This why you still get only voice after 100 years
of innovations
21
0800, 0900, prepaid, IVR all together is just one
application VOICE
22
On the Internet voice is just another application
23
Dont negate it, on you laptops you have more
then voice
24
Do you use SIP today?
25
Because of the laptop software policy of your
employer it could be that you never experienced
voice over IP
26
Not knowing how Internet works, is an ingredient
of going bankrupt
27
Internet is based on the end-to-end principle,
all services may be offered anywhere and can be
accessed from everywhere
28
In Internet you have connectivity and applications
29
Voice is just another application
30
Next to email, web and others
31

• Voice and other communications do not need a
  service provider at all, they are applications.
• Jon Peterson, ITU-IETF NGN Workshop, Geneva, May
  2005

32
Actually, there is plenty to do for an operator
if you dont clutch at penny per minute anymore
33
Replace your marketing department and you will
see how competitive and innovative you become
34
Internet intelligence is at the edge, this opens
the competition with any new entrant
35
You most important technical assets today (your
signaling point presence on the SS7 network) is
not anymore a critical advantage
36
Today some work hard on copying PSTN concepts
over an Internet infrastructure
37
IMS is an example of such concept
38
Technically complicated, appealing for decision
makers who still try to lock users in a walled
garden
Very good for the vendors
39
Differentiation in price become less and less an
argument in a flate-rate services model
40
Paying for two networks PSTN and Internet is
expensive, migrating to an all IP network should
be cost effective
41
But you cannot keep the benefits for yourself,
you must share them with your customers
42
You should not pay to migrate to IP if all you
can offer is an old voice service
43
You cannot maintain your todays revenues while
offering only voice and paying for migration to IP
44
Innovation is the only possible driving force for
new revenues, voice should be only one of the
possible services
45
And innovation happens only at the edge, so dont
build a walled garden
46
Building walled gardens does not justify the
costs and limit the innovation at the edge, the
basic principle that boosted the Internet
47
By the time you finish building up your walled
garden, the customers will be safely
outside. Adrian Georgescu
48
What assets do you have compatible with the
Internet?
49
Your customers, obviously!
50
What can you offer them in the NGN context?
51
Internet Access (Copper, Fibber, Wireless)
Identity (SIM card)
Terminals (devices and software)
Presence (Integration between communication and
business)
Digital identity and certificate management
Connection to and from PSTN
Addressing and Numbering
52
Addressing and Numbering
53
Address is a sticky product
54
Sticky products means sticky customers
55
You dont want to loose your e-mail address,
right?
56
Some accept to loose their telephone numbers and
get new ones because of the geographic nature of
numbering resources
57
NGN main addressing scheme is a SIP address
User_at_Domain
58
You can use a number but is still a number_at_domain
Number_at_Domain
59
A telephone number is just another attribute of
the SIP address
60
You can have more than one telephone number
mapped to a SIP address
61
My identity is ag_at_ag-projects.com
62
You can reach me by both email and voice using
SIP to ag_at_ag-projects.com
63
I want to be reachable also from PSTN or IP
devices with 12 keys
64
You can reach me if you dial
31208005169
40317105169
ag_at_ag-projects.com
65
From the Internet
henry_at_mci.com
From PSTN or Internet
31208005169
40317105169
ag_at_ag-projects.com
66
Mapping E.164 telephone numbers to IP addressing
schemes is called ENUM
31208005169
SIP
40317105169
ag_at_ag-projects.com
67

• ENUM is defined by the Internet Engineering Task
  Force (IETF) in RFC3761 as
• the mapping of Telephone Numbers to Uniform
  Resource Identifiers (URIs) using the Domain Name
  System (DNS) in the domain e164.arpa

68
The purpose of ENUM is to enable the convergence
between the PSTN and the Internet and enable new
applications based on E164 numbers
69
ENUM has been only recently adopted by 3GPP
70
ENUM is used today by VoIP operators. Eithout it,
calls between their islands will still go through
PSTN
71
Without ENUM there is no way you can address a
subscriber from one IMS domain to another one
Because any number on IP is Number_at_Domain The
Domain part can be looked up only by an ENUM query
72
ENUM allows you to point a numbering resource to
its network hosts and specify which protocol can
be used to connect SIP,H323, SS7, Email, more
than 15 are standardized today
73
Number portability on PSTN
Current telephone number portability works with
limited success and dependent on regulatory in
each country

• It takes 3 months to port my number from KPN to
  Vodafone
• Porting numbers between mobile and fixed
  operators is still a dream
• Cannot port numbers from one country to another

VoIP Providers depend on SS7 IN database for
number portability, is slow expensive and not
Internet ready
74
Number portability on IP
On the Internet you already have portability.
Without maybe being aware, everybody is using it,
the DNS.
When you move your website from one hosting
provider to another you get a new IP address but
you do not change the name of your website
By simply pointing the website name to the new IP
address of the server you are done
75
Number portability on IP
There is no regulatory, agency or government
office that intermediates the changes in the DNS.

• You dont send a fax
• You dont wait for 3 months
• You do it yourself when you want and how you want

Internet is much more cost effective than PSTN,
there are no administrative barriers that hinders
the porting process
76
Number portability on IP
Voice over IP is another Internet application, so
we can use the same principles that apply for web
and e-mail
SIP protocol maps the phone IPport to a SIP
address
ENUM protocol maps the E.164 number to a SIP
address
SIP with ENUM combine the logic of uniting the
identity (from both Internet and PSTN) with the
access, the device and the service
77
(No Transcript)
78
(No Transcript)
79
End-user experience of number portability on IP
alice_at_example.com 1-123-456789
Sip1234_at_provider1.com
Sip5678_at_provider2.com
80
Business models based on ENUM
81
You can sell identities independent of the VoIP
service
82
Connect VoIP islands (ENUM exchange)
Sell DID numbers worldwide
Enable video and IM for enterprises
Number portability solution (can replace COIN)
83

• This presentation is available at
• http//ag-projects.com/ENUM/

84

• Thank you
• Adrian Georgescu
• ag_at_ag-projects.com