october 16, 1998 (1) icnp’98cselt panel session internet telephony the next killer application?...
TRANSCRIPT
October 16, 1998
(1)
ICNP’98 CSELT
Panel Session
Internet TelephonyInternet Telephonythe next killer application?the next killer application?
Eugenio GuareneCSELTe-mail: [email protected]
October 16, 1998
(2)
ICNP’98 CSELT
Voice over IP servicesInternet Telephony
PC-to-PCPC-to-PhonePhone-to-PhoneIP-Fax
Value added servicesCall centresCSCWWeb help desk
Voice/data integration Corporate
October 16, 1998
(3)
ICNP’98 CSELT
Basic elements for a service architecture
PSTN
Vocal Gateway
Network Mgmt
BillingServer
Client PC
Gatekeeper
Directory Server
MessagingServer, VAS
Vocal Gateway
IP network
Client PC
October 16, 1998
(4)
ICNP’98 CSELT
Protocol efficiency: RTP/UDP/IP
IP header
UDP header
RTP header
V=2V=2 PP XX CCCC MM PTPT Sequence NumberSequence Number
Time StampTime Stamp
Synchronization SouRCe (SSRC) identifierSynchronization SouRCe (SSRC) identifier
Source Port Destination Port
Message Length Checksum (optional)
Source Address
Destination Address
Version HLen TOS Total Length
Identification F Fragment Offset
TTL Protocol Header Checksum
Payload
5 words20 bytes
2 words8 bytes
3 words12 bytes
October 16, 1998
(5)
ICNP’98 CSELT
Bandwidth and statistical multiplexing
0
4
8
12
16
20
24
28
32
0 50 100 150 200 250 300 350 400
Time (sec)
Ban
dw
idth
(kb
it/s
)Measured in a window of 250ms
October 16, 1998
(6)
ICNP’98 CSELT
Dalay budget
Frame LookAhead
Frame LookAhead
TX processing
Network
RX buffering
RX processing
CoderTX
Contribution
RXcontribution
Originated bythe network
total delaytotal delay
October 16, 1998
(7)
ICNP’98 CSELT
PBX
Network delay and jitter control
R
GW
PBX
R
GW
IP WAN
Voice PktData Pkt
October 16, 1998
(8)
ICNP’98 CSELT
Sea Bulk Phone
I s r
a e
l
Internet
International PSTN
R u s s i a
I n d
i a
Access of multiservice carriers
to SEA-BONE
SEA-BONEInternet trunks
PSTNtrunks
Local and regional
Service ProvidersR
IWF
INTLEXCH
October 16, 1998
(9)
ICNP’98 CSELT
Sea Bulk Phone
SBPServer
GW
GK
ITSP
LocalLocalPSTNPSTN
GK
GW
ITSPLocalLocalPSTNPSTN
GK
GW
B
A
InternetInternet
““Internet Quality”Internet Quality” ITSPITSP
““ To
ll Qu
ality
”T
oll Q
ua
lity”
““Toll Quality”Toll Quality”
A
SEASEABONEBONE
InternationalPSTN
Billing
October 16, 1998
(10)
ICNP’98 CSELT
Product evaluation
A: Core End side PSTN interface B: Core End side implementation C: Edge End side - PSTN InterfaceD: Edge End side Implementation E: Voice Transport Techniques F: Routing of CallsG: Networking Security Issues H: Voice coding & QoS performance I: Network managementJ: Service management K: Equipment requirements L: End-user service featureM: Organizational & technical assistance
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D
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October 16, 1998
(11)
ICNP’98 CSELT
Corporate Communications
CorporateBackbone IP WAN
--> Internet
LAN
LAN
LAN
LAN
ATM/FR WAN
LAN
HeadquarterHeadquarter
R
RX
R
PC
PC
PC
PC
R
X
PC
R XPC
PC
R
NAS
SOHOSOHO
Remote SiteRemote Site
Dial-up UserDial-up User
WS
WS
WS WS
PABX
PABX
PSTNISDN
October 16, 1998
(12)
ICNP’98 CSELT
Voice-data integration
CorporateBackbone IP WAN
--> Internet
LAN
LAN
LAN
LAN
ATM/FR WAN
LAN
HeadquarterHeadquarter
R
RX
R
PC
PC
PC
PC
X
PC
XPC
PC
R
NAS
SOHOSOHO
Remote SiteRemote Site
Dial-up UserDial-up User
WS
WS
WS WS
PABX PSTNISDN
VGW
R
R
VGW PABX
October 16, 1998
(13)
ICNP’98 CSELT
PABX-less company
CorporateBackbone
LAN
LAN
LAN
LAN
ATM/FR WAN
LAN
HeadquarterHeadquarter
R
RX
R
PC
PC
PC
PC
X
PC
XPC
PC
RSOHOSOHO
Remote SiteRemote Site
Dial-up UserDial-up User
WS
WS
WS WS
R
R
PSTNISDN
VGW
IP WAN--> Internet
NAS
October 16, 1998
(14)
ICNP’98 CSELT
LANCO
Server
Internet
GWRouter
Local PoP
Merchant central
site
Web server
Local stores
Voice-data application: an example
PPP to IP gateway