ww

w.i3fo

rum

.org

i3 FO

RU

M

Ho

w t

o im

ple

men

t in

tern

ati

on

al IP

Vo

ice In

terc

on

necti

on

sd

iffe

ren

t s

olu

tio

ns

fo

r d

iffe

ren

t n

ee

ds

pre

sen

ted

by

Ale

ss

an

dro

Fo

rcin

a(i

3 F

oru

m W

S T

ech

nic

al

Asp

ects

Ch

air

ma

n)

TE

LE

CO

M IT

AL

IA S

PA

RK

LE

Ma

y 2

6th

, 201

1

Ag

en

da

i3f

gu

idelin

es

Th

e B

usin

ess F

ram

ew

ork

Imp

lem

en

tin

g a

nd

Testi

ng

an

IP

In

terc

on

necti

on

arc

hit

ectu

re

sig

nallin

gp

roto

co

ls

med

ia c

od

ing

Qo

Sco

ntr

ol

Testi

ng

pro

ced

ure

s

Vo

ice o

ver

IPX

Ro

uti

ng

an

d A

dd

res

sin

g

Th

e V

oic

e o

ver

IP w

orl

d in

2007/0

8

To

o m

an

y a

lte

rna

tiv

es

, n

o c

lea

r p

ath

to

be

pu

rsu

ed

,

no

be

st

pra

cti

ceM

ult

iple

Vo

ice C

od

ec:

str

on

g i

ssu

es w

ith

Fo

IP

Testi

ng

Pro

ced

ure

:

no

best

pra

cti

ce

Sig

nallin

g:

SIP

, S

IP-I

, H

.323,

BIC

C,H

.248

Secu

rity

:

no

best

pra

cti

ce

IP C

on

fig

ura

tio

n /

Co

din

g:

Mu

ltip

le c

ho

ices

Th

ree g

uid

elin

es f

or

i3 f

oru

m

Be a

s “simple

”as p

ossib

le

Co

ver

(th

e m

ark

et)

as m

uch

as p

ossib

le

Giv

e e

xam

ple

s / b

est

pra

cti

ces

WS

“T

ec

hn

ica

l A

sp

ec

ts”

Mis

sio

n a

nd

Ob

jec

tiv

e“T

o t

echnic

ally

allo

w a

worl

dw

ide a

nd u

nre

str

ain

ed m

igra

tion t

o I

P o

f exi

sting

T

DM

In

tern

ational

voic

e in

terc

onn

ections selecting

,on th

e basis

of

exi

sting

sta

ndard

s/r

eco

mm

endations i

ssued b

y in

tern

ation

al

bod

ies, a unique network

architecture capable to support one (or a limited number of)

interconnection model(s) for the implementation of trusted, secure and

QoScompliant VoIP interconnection between Int. Wholesale Carriers”

Dif

fere

nt

Bu

sin

es

s M

od

els

fo

r In

tern

ati

on

al

Vo

ice

Se

rvic

es

Bil

ate

ral

Hu

bb

ing

(Op

en

Wh

ole

sa

le M

ark

et)

IPX

Oth

ers

(e.g

. C

om

mu

nit

ies w

ith

on

-net

/ o

ff-n

et

traff

ic c

on

cep

ts)

Wit

h

Va

rio

us

le

ve

l o

f q

ua

lity

(at

the I

P a

nd

serv

ice l

ayers

)

Ca

sc

ad

e p

aym

en

t

Vo

lum

e b

as

ed

bil

lin

g(w

ith

or

wit

ho

ut

co

mm

itm

en

ts)

Th

e B

usin

ess F

ram

ew

ork

No major change between TDM business model vs. Voice over IP

Carr

ier

A

Bo

rder

Fu

ncti

on

s

Bo

rde

r

Fu

nc

tio

ns

Carr

ier

B

(Do

me

sti

c

Op

era

tor)

TD

M

VoIP

TD

M

VoIP

Serv

ice

Pro

vid

er

A

Serv

ice

Pro

vid

er

B

(Do

me

sti

c

Op

era

tor)

CH

FC

HF

CH

F:

Ca

ll H

an

dli

ng

Fu

nc

tio

n

ME

DIA

Tra

nsp

ort

Pla

tfo

rm

SIG

NA

LL

ING

(Vo

IP,

Sig

tra

na

pp

ls.)

Sig

tra

nA

pp

ls.

Sig

tra

nA

pp

ls.

TD

M(M

NO

)

TD

M(M

NO

)

Carr

ier

A

Bo

rder

Fu

ncti

on

s

Bo

rde

r

Fu

nc

tio

ns

Carr

ier

B

(Do

me

sti

c

Op

era

tor)

TD

MT

DM

VoIP

VoIP

TD

MT

DM

VoIP

VoIP

Serv

ice

Pro

vid

er

A

Serv

ice

Pro

vid

er

B

(Do

me

sti

c

Op

era

tor)

CH

FC

HF

CH

F:

Ca

ll H

an

dli

ng

Fu

nc

tio

n

ME

DIA

Tra

nsp

ort

Pla

tfo

rmT

ran

sp

ort

Pla

tfo

rm

SIG

NA

LL

ING

(Vo

IP,

Sig

tra

na

pp

ls.)

Sig

tra

nA

pp

ls.

Sig

tra

nA

pp

ls.

TD

M(M

NO

)

TD

M(M

NO

)

Gen

era

l R

efe

ren

ce C

on

fig

ura

tio

n

Dom

estic inte

rconn

ections (

TD

M/IP

; IP

/IP

) are

out

of

sco

pe

Wh

ich

kin

d o

f in

terc

on

necti

on

s?

Pri

vate

Pri

va

te-o

rie

nte

d i

nte

rco

nn

ec

tio

n

no u

nid

entified third p

art

y is

able

to a

ffect th

e V

oIP

serv

ice

Tra

nsport

Altern

atives a

t Layer

1 / Layer

2 / L

ayer

3

Pri

va

te i

nte

rco

nn

ecti

on

s c

an

rep

lace e

xis

tin

g T

DM

-based

ones g

uara

nte

ein

g

the hig

hest

level

of

qualit

y both

in

te

rms of

voic

e call

qualit

y, serv

ice qualit

y,

netw

ork

ava

ilabili

ty a

nd n

etw

ork

security

.

Carr

ier

A

IP n

etw

ork

Carr

ier

B

IP n

etw

ork

PE

ro

ute

rP

E r

ou

ter

Bo

rde

r

Fu

nc

tio

ns

Bo

rde

r

Fu

ncti

on

sA

lt.

2

Alt

. 1

Alt

. 3

3rd

part

y I

P n

etw

ork

Carr

ier

A

IP n

etw

ork

Carr

ier

A

IP n

etw

ork

Carr

ier

B

IP n

etw

ork

Carr

ier

B

IP n

etw

ork

PE

ro

ute

rP

E r

ou

ter

Bo

rde

r

Fu

nc

tio

ns

Bo

rde

r

Fu

ncti

on

sA

lt.

2

Alt

. 1

Alt

. 3

3rd

part

y I

P n

etw

ork

..as w

ell a

s P

ub

lic In

terc

on

necti

on

s

Pu

bli

c-o

rie

nte

d i

nte

rco

nn

ec

tio

nV

oIP

tra

ffic

is m

ixed

with o

ther

IP t

raff

ic c

om

ing f

rom

the P

ublic

Inte

rne

t �

gate

wa

ys’

inte

rfaces

can

be

reached

fro

m

unid

entified

third

pa

rtie

s. VPN IP Sec encryption

required for signalling

Tra

nsport

Altern

atives:

�A

lt. 1: direct in

terc

onnection s

haring d

ata

and V

oIP

tra

ffic

�A

lt. 2: via

Public

Inte

rnet: n

on d

irect in

terc

onnection

Pu

bli

c

inte

rco

nn

ecti

on

s

imp

ly

low

er

co

st

an

d,

in

gen

era

l,

low

er

pro

vis

ion

ing

tim

e

Carr

ier

A

IP n

etw

ork

Carr

ier

B

IP n

etw

ork

PE

ro

ute

rP

E r

ou

ter

Inte

rne

t T

raff

ic +

Vo

ice

Tra

ffic

Bo

rder

Fu

ncti

on

sA

lt.

1

Bo

rder

Fu

ncti

on

s

Carr

ier

A

IP n

etw

ork

Carr

ier

B

IP n

etw

ork

PE

ro

ute

rP

E r

ou

ter

Alt

. 2

Bo

rder

Fu

ncti

on

s

Bo

rder

Fu

ncti

on

s

Wh

ich

Sig

nallin

g P

roto

co

l?

Sig

na

llin

g P

roto

co

ls f

or

Vo

ice

se

rvic

es

: 2

pro

toc

ols

se

lec

ted

SIP

pro

toco

l(I

ET

F R

CF

3261):

a

specific

pro

file

has b

een d

efine

d

SIP

-I p

roto

co

lIS

UP

enable

d S

IP p

rofile

(IT

U-T

Q.1

912.5

Anne

x C

Pro

file

C),

sele

cte

d a

lso f

or

the s

upport

of

ISD

N s

erv

ices

Su

pp

ort

of

Sig

tran

for

Mo

bile a

pp

l.s

(SM

S, C

am

el a

nd

ro

am

ing

mo

bil

e)

via

M2P

A (

pre

ferr

ed

so

luti

on

)or

M3U

A w

hen n

o r

ela

yin

g c

apab

ility

is n

eeded

SC

TP

betw

een

IP

la

yer

an

d S

IGT

RA

N a

dapta

tion la

yers

Map

pin

g o

f IS

UP

RC

� ���S

IP, S

IP-I

Lack o

f converg

ence a

mong I

TU

Q.1

912.5

, IE

TF

RF

C3398,

3G

PP

TS

29.1

63

Impact

on r

outing a

nd Q

oS

(NE

R)

contr

ol

Adoptio

n o

f R

easo

n H

ead

er

as t

em

pora

ry a

nd p

art

ial fix

(in

2010)

Co

nverg

ing

on

a u

niq

ue IS

UP

RC

� ���S

IP, S

IP-I

map

pin

g

Join

t activity

with 3

GP

P C

T3 �

ap

pro

val

in 3

-’11 o

f 3G

PP

TS

29.1

63 V

.7.2

2

Note: SCTP: Stream Control Transmission Protocol

Wh

ich

co

din

g s

ch

em

e?

•AM

R-N

B w

ith

VA

D/D

TX

•IT

U-T

G.7

29a w

ith V

AD

/DT

XL

ow

Bit

R

ate

Co

decs

•IT

U-T

G.7

22 (

for

fixe

d o

pera

tors

)

•AM

R-W

B (

for

mobile

opera

tors

)

Wid

e b

an

d

Co

decs

MA

ND

AT

OR

YO

PT

ION

AL

Narr

ow

ban

d

Co

decs

•IT

U-T

G.7

11 A

-law

, µ

-law

64kbit/s

•IT

U-T

G

.729,

G.7

29a

, G

.729b,

G.7

29

ab 8

kbit/s

•IT

U-T

G.7

23.1

•IT

U-T

G.7

26

•AM

R-N

B

Fax M

od

em

Co

decs

•FA

X: IT

U-T

G.7

11 a

nd

IT

U-T

T.3

8

•Modem

: IT

U-T

G.7

11

Note: Using G.723.1 quality impairments have to be considered

Vo

ice E

ng

ineeri

ng

do

cu

men

t R

el.

3 (

Q2 ’11)

Co

dec s

ele

cti

on

co

nfi

rmed

by i

nte

rnal

i3 f

oru

m s

urv

ey (

Q4 ’

10)

Wh

ite p

ap

er

on

Fax o

ver

IP i

n c

o-o

pera

tio

n w

ith

Sip

Fo

rum

(Q

1 ’

11)

Fax o

ve

r IP

testi

ng

acti

vit

y i

n p

rog

ress (

Q2 ’

11) � ���

resu

lts i

n F

oIP

Rel. 2

(Q

4 ’

11)

Hb

ut

the in

terc

on

necti

on

mu

st

be s

ecu

reB

ord

er

Fu

nc

tio

ns

(e

.g.

Se

ss

ion

Bo

rde

r C

on

tro

lle

r)

It i

s s

tro

ng

ly r

eco

mm

en

ded

th

at

Bo

rder

Fu

ncti

on

s b

e a

lways i

mp

lem

en

ted

,

achie

vin

g t

op

olo

gy

hid

ing a

nd N

AT

/NA

PT

tra

nsla

tio

n

DoS

/DD

oS

Attack, P

roto

col V

uln

era

bili

ties, A

ddre

ss/I

dentity

Spoofing,

Theft

of

Serv

ice, R

ogue M

edia

, S

essio

n H

ijackin

g, N

etw

ork

Intr

usio

n,

Inte

rnal N

etw

ork

Security

Secu

rity

Th

reats

Topolo

gy

Hid

ing, E

ncry

ption, A

uth

entication, A

cce

ss C

ontr

ol Lis

ts,

Revers

e P

ath

Filt

ers

, T

raffic

polic

ing, A

pplic

ation

Level R

ela

ying

Deep P

acket In

spection, S

RT

P, D

NS

SE

C, M

edia

Filt

ering, F

irew

alls

,

Intr

usio

n D

ete

ction S

yste

ms,

De

vic

e H

ard

enin

g, Logg

ing a

nd A

uditin

g

Security

In

form

ation &

Code U

pdate

s

Secu

rity

Mech

an

ims

Wh

ite p

ap

er

on

Secu

rity

fo

r IP

In

terc

on

necti

on

s d

eli

ve

red

at

ITW

2011(Q

2 ’

11)

wit

h R

eco

mm

en

dati

on

Matr

ixes

3 l

evel

of

sec

uri

ty:

Ba

sic

, i3

f R

eco

mm

en

ded

, i3

f O

pti

on

al

co

ve

rin

g

sig

nall

ing

, q

uery

an

d m

ed

ia in

terf

ace

s

Han

d w

ith

co

ntr

olled

Qo

S

BA

SIC

RE

QU

IRE

ME

NT

(AL

Lc

laim

ab

ou

t Q

ua

lity

of

Se

rvic

e C

on

tro

l)

NO

SO

LU

TIO

N Y

ET

(at

lea

st

for

AL

LB

us

ine

ss

Mo

de

l, e

.g.

Bil

ate

ral,

IP

X,

Op

en

WS

Mark

et,

an

d o

n l

arg

e s

ca

le)

Clytemnestra kills Cassandra

SP

s(I

PX

SP

s)

kill C

arr

iers

(IP

X P

rovid

ers

)A

new

daw

n

Qo

S:

wh

at

has b

een

defi

ned

Transmission/IP parameters:

�R

TP

round-t

rip d

ela

y�

RT

P jitte

r�

RT

P p

acket

loss

Service parameters

�M

OS

CQ

E/ R

-Facto

r�

ALO

C�

AS

R�

NE

R�

PG

RD

Sc

op

eM

onitori

ng (

su

perv

isio

n)

ag

ain

st

giv

en t

hre

shold

sT

rouble

shootin

gS

erv

ice L

evel A

gre

em

ent

(SLA

) and Q

ualit

y of

Serv

ice r

epo

rtin

g

Pa

ram

ete

rs I

de

nti

fic

ati

on

an

d r

ele

va

nt

de

fin

itio

n

CLI

transpare

ncy

not

consid

ere

d a K

PI

ho

wever,

it is

str

ongly

re

com

men

ded

th

at

inte

rnational

carr

iers

w

ill

pass

on

CLI

unaltere

d.

Refe

ren

ce

Co

nfi

gu

rati

on

fo

r Q

oS

for

Serv

ice P

rovid

er

<->

Carr

ier

rela

tio

nsh

ip

Qo

S:

wh

at

has b

een

pro

po

sed

A corresponding configuration is given for the Carrier-to-Carrier relationship

Qu

ali

ty M

ea

su

rem

en

ts A

gg

reg

ati

on

addin

g n

etw

ork

by

netw

ork

the

measure

d q

ua

lity

data

i3f

WS

Serv

ice a

naly

se

dth

e c

om

merc

ial /

opera

tion

al im

pact

of

such a

schem

e

Qo

S:

Vari

ou

s A

ltern

ati

ves

RT

CP

-Ba

se

d

exis

ting i3 F

oru

m I

nte

rconnect

Model (p

roposed in 2

010)

Alt

ern

ati

ve

Lo

op

-ba

ck

the B

ord

er

Fun

ctions (

i.e.

SB

C)

makes t

esting c

alls

to d

um

my

num

bers

term

inate

d t

o t

he last

SB

C,

based o

n D

RA

FT

IE

TF

-m

music

-loop

back-1

4

SIP-based quality feedback

the S

IP m

essa

ge (

INF

O o

r P

UB

LIS

H)

sen

d b

ack t

he q

ualit

y in

form

atio

n e

ach

carr

ier’s inte

rmedia

te a

nd f

ina

l (o

r fa

r-end)

bo

rder

functions w

ould

app

end a

nd

re

turn

tra

nsport

and s

erv

ice p

ara

mete

rs

Need to h

ave

cle

ar

guid

elin

e�

savin

g $

$$ / €

€€

in p

rovis

ionin

g tim

e

skill

ed s

taff�

savin

g $

$$ / €

€€

in tra

inin

g

sm

alle

r sta

ff�

savin

g $

$$ / €

€€

in s

ala

ries

short

tro

uble

shooting�

savin

g $

$$ / €

€€

in n

etw

ork

opera

tion

Makin

g T

esti

ng

mo

re e

ffic

ien

t

Fro

m i3f W

S “

Opera

tions”

Migration Interconnection Form

A p

ow

erf

ul to

ol to

exchange

tech

nic

al in

form

ation f

or

the s

et

up

of

a n

ew

VoIP

inte

rconnection

and u

nders

tand

at firs

t gla

nce p

ossib

le c

om

patibili

ty issues

Interoperability Test Plan

A d

eta

iled t

est

list

support

ing t

esting p

hase d

uring t

he a

ctivation o

f a n

ew

inte

rco

nnection o

r during t

rouble

shooting p

hase

Training Program in operation / Best practices guide (to be released)

Handbook w

ith o

pera

tional guid

elin

es fro

m r

efe

ren

ce c

onfigura

tions to p

rovis

ionin

g to testing

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om

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ntities s

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pro

cess a

nd

is r

ead

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o s

up

po

rt it

Th

e V

oic

e o

ver

IP w

orl

d in

2011

Mu

ltip

le V

oic

e C

od

ec:

Rec.

Vo

ice C

od

ecs

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ide

lin

es

fo

r F

oIP

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rc.

Testi

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ced

ure

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rati

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terc

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orm

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rop

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est

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nallin

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map

pin

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rity

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Wh

ite P

ap

er

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011

IP C

on

fig

ura

tio

n /

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din

g:

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va

te /

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blic C

on

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Transitioning the Industry to IP

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ice o

ver

IPX

Tech

nic

al

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ecs.

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aly

sis

mark

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uti

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ite p

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ts

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w.i3fo

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