VOICE OVER PACKET

1
VOICE OVER PACKET

• Plymouth University
• Feb 2003

2
Zarlinks Product Groups
Network Access
User Access
Medical
Timing Synchronization
Tuners Demodulators
Pacemakers
TDM Switching
Digital TV
Audiologic
Voice Over Packet
Cellular Handsets
Ultra-Low Power RF
Packet Switching
High Performance Analog
Optical Interconnects Components
3
Zarlinks Customers
Network Access
User Access
Medical
SIEMENS
4
Typical Applications (Voice Data)
5
Zarlinks Solutions (1)
Network Access
6
Zarlinks Solutions (2)
Network Access

• TDM
• High BandwidthTDM Switches
• SONET/SDH Network Synchronization
• High Density Voice
• Echo Cancellers
• ATM
• AAL1 SARs
• IP
• GB Ethernet Switches
• Voice Over Packet Processors
• High Performance Analog
• Optical
• Components
• VSR

7
The Big Trend - Voice Centric to Data Centric

• Data services are the dominant traffic type
• Intranet, internet and email are the main drivers
• CAGR data service 30-50, voice 3-5
• Source Adams, Harkness Hill (2001)
• Consequence New network architecture required
  within the access, edge and core networks

For source see speaker notes
8
Moving Networks to a Packet Infrastructure
Moving To VoIP
IP/Ethernet/ TDM
IP/Ethernet TDM
IP/MPLS
RAS
Switch
Aggregation Equipment
DSLAM
Backbone Equipment
Router
CPE
Access
Edge
Core
9
Converged Network Architecture
Speed
Intelligence
RAS
Converged Networks Deliver Savings
Switch
Aggregation Equipment
DSLAM
Backbone Equipment
Router
10
Edge is the Aggregation Point

• Terminates many traffic types
• Feeds into ATM and IP core networks
• IP/MPLS and Ethernet are growing fast
• No new ATM deployments
• Supports legacy services
• T1/E1 and DS3/E3 are included in this
• High Level of QoS

Source Ciscos MAN Overview
Source Ciscos MAN Overview
11
However- Voice is Still the Problem

• There is a lot of TDM equipment and lines
• With the downturn, TDM will be around for a long
  time
• Capital expenditure is down severely
• However, suppliers need to address how to migrate
  voice from voice networks to data networks
• Service Providers are focusing on operational
  efficiencies
• Hence the requirement for converged networks
• Voice in data networks is not easy
• More bandwidth does not solve the problem
• QoS is key, data networks must be engineered to
  support voice
• Voice cannot be toll-quality on unmanaged data
  networks

12
Many Ways to Skin a Cat!

• VoIP
• If voice and data are converged at the CPE then
  VoIP makes the most sense
• This is the end game of most companies
• CESoP
• Circuit Emulation Services
• If the infrastructure is TDM, and point-to-point,
  then CESoP makes sense
• Simpler than VoIP
• Great at point-to-point links
• VoWLAN
• Similar to VoIP, added advantage is mobility

13
Technical Drivers for VoIP

• Technical Driver 1 Standards and
  interoperability now largely resolved
• Will take time to filter through
• Over the next 24 months growth will be steady
  before more wide-scale adoption
• Technical Driver 2 Natural evolutionary process
  of migration to VoIP
• Enterprises and carriers are moving to VoIP now
• Evolution not revolution

Source Deutsche Bank Securities Inc
14
Business Drivers for VoIP

• Business Driver 1 VoIP delivers mission critical
  services
• Although this was always true, this was not the
  perception
• Business Driver 2 The economics of packet
  transmission are becoming increasingly
  transparent to carriers and enterprises
• We believe VoIP will gain increasing acceptance
  driven by its relative network simplicity, lower
  cost structure and ability to carry both voice
  and data across a single, ubiquitous network
• Beyond that we expect momentum to continue to
  build as new applications/services emerge that
  homogeneously combine voice/video/data

Source Deutsche Bank Securities Inc
15
VoIP Standards
Stratum 4e PLL
16
Market Forecasts (1)

• We estimate the market for VoIP equipment will
  grow to approximately 10 billion by 2005 from
  close to 2 billion in 2001
• Although slow at present, we think the adoption
  of VoIP will accelerate in 2004-2005 and continue
  through the remainder of the decade
• Source Deutsche Bank Securities Inc.
• 3B for LAN telephony systems by 2005
• Source Cahners In-Stat

17
Market Forecasts- PBX Market (2)
18
Market Forecast- IP Core (3)
19
What is CESoP?

• CESoP tunnels T1/E1 traffic through packet
  networks whilst maintaining T1/E1 clock and data
  integrity.
• Invisible to source and destination
• Packet network emulates a circuit-switched
  network, re-creating the TDM circuit at the far
  end

T1/E1 line
T1/E1 line
Packet network
20
Comparing VoIP to CESoP
CES T1/E1
PBX Gateway
Data Network
Ethernet
iPBX
21
Drivers for CESoP

• Allows ILECs/CLECs to leverage their existing
  T1/E1 and DS3/E3 infrastructure
• Whilst moving to packet based networks
• Allows customers to still get the same service,
  QoS and peace of mind as they already have
• Dont have to invest in new equipment
• Requires little new equipment

22
How will CESoP be deployed?
23
CES Standards

• Internet Engineer Task Force (IETF)
• Pseudo wire end to end emulation (PWE3)
• Zarlink co-sign on draft specification
• ITU
• Just started at this process, led by Nortel
• Metro Ethernet Forum (MEF)
• CES is a service on MEN
• Zarlink editor on CES document

24
The Future VoWLAN (1)

• Cost of WLAN equipment is falling fast, much in
  the way Ethernet did
• WLAN is moving fast
• This year will be the year of WLAN hotspots
• Train stations, hotels, airports, coffee shops
• Today this is only data
• Additionally, wireless voice is happening in
  WLANs
• Several companies have this equipment
• This will move to WLAN hotspots

25
The Future VoWLAN (2)

• VoWLAN is inevitable for WLAN
• It will deliver freedom to VoIP
• VoWLAN with 2G/2.5G could give 3G serious
  competition
• Four major announcements
• Lucent UMTS 3G with WLAN.
• Ericsson partners Agere for WLAN hotspots.
• Nokia equipment for 2G/2.5G/3G and WLAN hotspots
• Motorola, Proxim and Avaya partner for Phone/WLAN
  hand-over

26
The Consequence of Delayed 3G

• US107 billion on licenses and infrastructure in
  Europe
• The European wireless market now doubts whether
  it will ever recoup its investment.
• As a result
• Carriers scaling down their 3G roll outs
• Remain unwilling to spend more until real signs
  of consumer interest demonstrate themselves
• However, many European wireless companies are
  excited about the emergence of Wi-Fi, which many
  European carriers hope to integrate with their
  existing GSM/GPRS networks.
• Source www.reuters.com/newsArticle.jhtml?typetop
  NewsstoryID2257078 (Mobile Industry Struggles
  in Wireless Web )

27
WLAN Standards

• IEEE 802.11b
• 2.4GHz _at_11Mbps
• IEEE 802.11g
• 2.4GHz _at_ 54Mbps
• IEEE 802.16a WMAN
• 10 to 66 GHz _at_ 54Mbps
• It closes the first-mile gap, giving users an
  easily installable, wire-free method to access
  core networks for multimedia applications
• Chair of the 802.16 Working Group on Broadband
  Wireless Access.

28
The Future?
Moving To VoIP
IP/Ethernet/ TDM
IP/Ethernet TDM
IP/MPLS
RAS
Switch
Aggregation Equipment
DSLAM
Backbone Equipment
Router
CPE
Access
Edge
Core
29
w w w . Z A R L I N K . c o m
30
Current Situation
Edge Access
31
Mobility
User Access
Radios for Handsets
W CDMA 3G
N.A. GPRS 2.5G
TDMA 2G
32
Mobility
User Access
Radios for Handsets
W CDMA 3G
Network Access

• TDM
• ATM
• IP
• Timing

N.A. GPRS 2.5G
TDMA 2G