Transcript Powerpoint

Evolutionary Convergence Of
Voice Networks.
Alex Gatiragas
IP Telephony Product Manager
Market Trends
U.S. Enterprise Communications
000s of IP Lines Shipped
6000
5000
4000
3000
2000
1000
0
1999 2000 2001 2002 2003 2004
3%
4%
13%
25%
33%
% Compared to new ‘traditional PBX’ line shipments
Data From The Phillips Group - InfoTech
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Alex Gatiragas
NEC IP Telephony – June 2001
Market Trends
Why the slow take up?
• Quality and reliability concerns 53%
• Unproven technology 25%
• PSTN works fine 22%
• Too busy to switch 19%
• No compelling economics 13%
* BCR Aug. 2000 - Forrester Research
Quality of Service (QoS) is a key requirement for IP Telephony
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NEC IP Telephony – June 2001
Quality of Service
Definition of QoS
There is no unique formal definition
RFC 2386:
„A set of service requirements to be met by the network while transporting a flow“
IEEE:
The set of those quantitative and qualitative characteristics of a distributed
multimedia system, which are necessary in order to achieve the required
functionality of an application.
NEC’s Definition: -
Accurately predicting the behavior of a data network.
IP Telephony call with no QoS example
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NEC IP Telephony – June 2001
Quality of Service
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CODEC
Compression
Mean
Opinion
Score
G.711
64 Kb
4.3
0.25 ms
G.728
16 Kb
4.0
1-3 ms
G.729
8 Kb
4.0
25 ms
G.723
6.3/5.3 Kb
3.6
67 ms
NEC IP Telephony – June 2001
Delay
Quality of Service
Packet Prioritisation
Input Interface
•Reservation (Integrated Services)
–RSVP (ReSerVation Protocol)
–SBM (Subnet Bandwidth Management)
•Prioritisation (differentiated services)
–DiffServ (Differentiated Services)
–MPLS (Multi Protocol Label Switching)
Memory
Data Packet
Voice Packet
Input Queue
Output Queue Output Interface
Jitter
Buffer
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Jitter Buffers ensure linear conversion of
voice packets to speech.
NEC IP Telephony – June 2001
Quality of Service - NEC Labs
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NEC IP Telephony – June 2001
PBX Migration
NEC’s Focus is on
Evolutionary Migration
LEAVE NOBODY BEHIND!
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NEC IP Telephony – June 2001
IP Trunking
PSTN/Private NW
SS7
SS7
• Reduction of carrier charges
- Inter office calls
- Off net calls
SS7
- 1800 / 13 calls
- Line rental savings.
• Enhanced Services
- Improvement in inter-office
QoS IP
Network
communication.
- Web enabled call centers.
- Centralised V/mail.
- Centralised operator.
In the skin
IP Trunk
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NEC IP Telephony – June 2001
IP Trunk Cards
• Capacity expansion via plug in modules.
IMX
• Multi-protocol support via Firmware
upgrade (IMX / IVS).
• 10 / 100 Base-T Ethernet support.
• G.711, G.723.1, G.729A Compression.
• G.168 Echo Cancellation.
IVS
• IP Precedence, Diffserve for QoS.
• Dynamic Jitter Buffer.
• G3 FAX T.30 Base.
Xen
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NEC IP Telephony – June 2001
IP Trunk Interoperability
IMX
PBX
Supported Protocols
• FCCS over IP (IMX)
• CCIS over IP (IMX & IVS)
• H.323v2 (All)
QoS IP
Network
• Qsig over IP (under
Cisco Call
Manager
development)
IP
Microsoft
Netmeeting
IVS
PBX
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Xen
KTS
NEC IP Telephony – June 2001
IP Trunk Implementations
Other Implementations:• National Jets.
• National Foods.
• Victoria Police.
NEC ATM
NETWORK
• QLD Uni of Tech.
• Yeronga TAFE.
• Toowoomba Hospital.
• North Limited
• …..Many More
NEC’s Toll Bypass
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NEC IP Telephony – June 2001
IP Extensions
• Cost Savings
- Cabling.
- Moves / Changes.
- Remote stations.
DtermIP
- PBX expansion.
IP-ELC
• Enhanced Services
QoS
LAN / WAN
Network
DtermIP
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DtermIP
- Mobility
- Remote Call Center Agents.
DtermIP
NEC IP Telephony – June 2001
IP Extensions
• High Capacity Cards.
• Full user feature transparency.
• 10 / 100 Base-T Ethernet support.
• Compression via add-on modules.
• 2 port switch built into IP Adaptor.
• G.168 Echo Cancel.
• Dynamic Jitter Buffer.
• IP Precedence, Diffserve for QoS.
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NEC IP Telephony – June 2001
IP Extension – Field Trial
Call Center
Agents
Head Office
DSL Service
Provider
Regional Office
Call Center
Agents
Call Center
Server
IP ELC
DSL Modem
DSL
Switched
LAN
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DSL Modem
Alex Gatiragas
NEC IP Telephony – June 2001
Switched
LAN
PBX – Extension Feature Transparency
Calls between IP extensions have signaling
through PBX, BUT voice stream is maintained as
peer to peer.
DtermIP’s
•Voice Mail
•CTI
•Billing
•Etc.
PH
Router
WAN
Switched
LAN
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Switched
LAN
Router
Alex Gatiragas
NEC IP Telephony – June 2001
Standards
Standards Supported by Vendors
H.248 / Megaco
H.323 v3
H.323 v1
MGCP per ISC spec
SIP
None / No Answer
Other
SIP per RFC 2543
MGCP per RFC 2705
H.323 v2
0
10
20
30
40
%
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NEC IP Telephony – June 2001
50
60
70
Standards
H.323 from vendor A does not necessarily equal H.323 from Vendor B
The Key is Interoperability Testing
• NEC – Cisco H.323 Interoperability.
– H.323 Normal / Fast Start
– H.323 interoperability between IP TRK and Cisco Call Manager
– Cisco 2620 GK IOS12.1(2)T
– Cisco 3620 GW IOS12.1(3a)T1
– Cisco 1750 GW IOS12.1(2)T
• NEC – Cisco Development
– H.450.x Supplemental Services (Name Display, Call Back, etc.)
– Cisco Discovery Protocol (CDP)
– Network Management
– Unified Directory
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NEC IP Telephony – June 2001
Powering IP Phones
10/100M
Layer 2 Switch
To UPS
Outlet
OR
PBX D.C Feed
Power Patch Panel
NEC
NEC
802.3af
PD signature
detection
DtermIP
Ethernet Connectivity
to users PC (via
integrated 10/100
Mb Switch)
RJ45
Wall Outlet
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NEC IP Telephony – June 2001
Powering IP Phones
10/100M
Layer 2 Switch
Warning !
Take care when moving patch
leads from Powered to NonPowered devices.
…OR
Directly from Layer 2 switch
with power insertion capability.
(e.g. Cisco 3524 X4-PN-PWR)
802.3af
PD signature
detection
DtermIP
Ethernet Connectivity
to users PC (via
integrated 10/100
Mb Switch)
RJ45
Wall Outlet
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NEC IP Telephony – June 2001
NEC Media Devices
Analog Media Converter
•Provides Analog to IP
conversion for 2 devices
E1 Media Gateway
•Provides DC power, Ring
voltage, M/W lamp
functionality….
•Provides E1 ISDN to IP
conversion.
Dterm Media Converter
•Provides Dterm to IP
conversion for 8
handsets.
•Provides DC power for
handsets
ISDN
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NEC IP Telephony – June 2001
IP Soft phone
ePhone (Local Development)
• Full Dterm features.
• Win 9x + Win 2000 compatibility
• Configurable look and feel (skins, auto-hide..).
• Phone-book facility.
• Call history logging.
• Extensive development plan.
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NEC IP Telephony – June 2001
Wireless IP Phones
NEC IP Phone
NEC PBX
802.11 AP
NEC H.323
Gatekeeper
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Wireless IP Phones
NEC IP Telephony – June 2001
NEC Advanced IP Terminal
•1/4 VGA (5.7”) colour or mono
• HTML / Java support
• Proprietary & H.323 support.
• 2 port switch.
• Switch Powered
• Expansion Module (eg. Bluetooth)
• USB port (keyboard / mouse)
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NEC IP Telephony – June 2001
PBX Evolution
WAN
IP Enabled
Dterms
PSTN &
Private
Networks
Media Gateway
Controller
PSTN &
Private
Networks
IP CS
IP PAD
IP Enabled
Dterm
Media
Gateway
Controller
IP Tel (H.323)
Media Converter
Media Gateway
Media
Converter
H.323
GATEKEEPER
H.323
GATEKEEPER
IP Tel (H.323)
IP NW
IP NW
IP CS
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Development
Evolution
Alex Gatiragas
NEC IP Telephony – June 2001
NGT
PBX Evolution
It Is Important To Be There….
But it is also important how you get there:
• Utilising integrated IP telephony products
• Embracing migration and investment
protection, not replacement and obsolescence.
And…
“Without Compromising the User Experience”
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Alex Gatiragas
NEC IP Telephony – June 2001
Thank you
Questions?