SCTNA Presentation Leveraging Technology to Reduce Expense and Improve Communications for your Busin

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SCTNA PresentationLeveraging Technology to
Reduce Expense and Improve Communications for
your Business

• December 14, 2006
• Presented by Mary Ann Mollenkamp David DK
  Kline

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Contents

• Legacy Communications Protocols
• IP - Strengths Weaknesses
• Voice over IP (VoIP) - Overview, Apps, Offerings
  Diagrams
• IP Videoconferencing
• Future

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Legacy Communications Protocols

• Voice - TDM
• LAN
• FDDI
• Token Ring
• LANtastic
• Ethernet
• Wan
• Dialup
• Point to Point (P2P)
• Frame Relay
• ATM

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IP - Strengths and Weaknesses

• Strengths
• Ubiquitous Standard
• Also Rans include IPX (Novell NetWare) Apple
  Talk
• Efficient Connection-less Sessions
• Fault Tolerant
• Shared Intelligence
• Weaknesses
• Best Effort
• Congestion

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Applications

• Data
• File Sharing
• Printer Sharing
• Business Applications
• Internet and E-Mail
• Voice over IP (VoIP)

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VoIP Overview

• Benefits
• Enables convergence of traditional data
  applications with voice to make better use of
  facilities / resources (a single network
  infrastructure)
• Facilitates the introduction of enhanced features
  and functions, like unified messaging, computer
  integration, island elimination, geographic
  roaming, etc.
• Enables non-traditional telephone companies to
  provide low-cost voice services through bandwidth
  efficiency
• Reduced MAC expense

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VoIP Overview

• Challenges
• Voice Quality
• NAT Traversal
• Security
• Skype and Asterisk Flaws
• A Miami businessman and hacker penetrate VoIP
  providers and steal thousands of free calls
• Forget phishing 1st Vishing attack surfaces
• Cost
• Equipment
• Bandwidth
• QoS

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Common Applications Offerings
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VoIP - What to do?

• Determine Goals
• Establish a budget
• Determine best fit
• Hybrid IP PBX / Digital Phone System
• Pure IP PBX / IP to the desktop
• Network Assessment
• Hosted VoIP
• Alternative - Station to Station Dialing
• MPLS for Data

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Multiprotocol Label Switching (MPLS)

• Definition.
• A packet switching protocol developed by the
  IETF. Initially developed to improve switching
  speed, other benefits are now seen as being more
  important.MPLS adds a 32-bit label to each
  packet to improve network efficiency and to
  enable routers to direct packets along predefined
  routes in accordance with the required quality of
  service. The label is added when the packet
  enters the MPLS network, and is based on an
  analysis of the packet header. The label contains
  information on the route along which the packet
  may travel, and the forwarding equivalence class
  (FEC) of the packet. Packets with the same FEC
  are routed through the network in the same
  way.Routers make forwarding decisions based
  purely on the contents of the label. This
  simplifies the work done by the router, leading
  to an increase in speed. At each router, the
  label is replaced with a new label, which tells
  the next router how to forward the packet. The
  label is removed when the packet leaves the MPLS
  network.Modern ASIC-based routers can look up
  routes fast enough to make the speed increase
  less important. However, MPLS still has some
  benefits. The use of FECs allows QoS levels to be
  guaranteed, and MPLS allows IP tunnels to be
  created through a network, so that VPNs can be
  implemented without encryption.

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MPLS Benefits

• Reliability
• Network Availability Guarantee Carriers should
  offer at least 99.9 uptime, and some will go as
  far as 99.999 of the time (5 Nines
  Reliability)
• Security
• Packets stay on private IP backbone
• Tag-switching technology isolates customer data
• Physically separate WAN and Internet connections
• Meets Regulatory or Legal Security Requirements
  of Certain Industries
• Simplicity
• Fully Managed
• No Special Hardware/Software Required
• Supports Existing IP Addressing Schemes for
  Internal Network
• Simplifies Content Filtering

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MPLS Benefits

• Flexibility
• The speed you need from 256 Kb up to DS-3
• Fully meshed topology
• Economical
• Aggressively Priced
• Can be part of an integrated T-1
• Economy of Scale Internet Purchasing
• No tunnels means
• Lower Installation Costs
• Less Administration (Logs, Patches, etc.)
• Reduced Exposure to Attacks

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Dynamic T1 - Lines, Trunks PRI
Internet Traffic
Voice Traffic
Media Gateway
IP Network
Gateway Router
Existing Class 5 Switch
Edge Router
Similar to Integrated, but voice and data share
total bandwidth
QoS is required at Service Provider Edge and
Customer Router
QoS is required at Service Provider Edge and
Customer Router
Dynamic T1
IAD
Switch
Voice hand-off can be Lines, Trunks or PRI
PBX or KTS
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IP PBX MPLS (On-Net Call)
On-Net Calls use host site for signaling. Media
is between end-users.
Router
Router
MPLS Network
Signaling
Media (voice traffic)
Router
Edge Router
Main Site MPLS Internet connections plus
PRIs Remote Sites Flex MPLS or MPLS Only
Dedicated VPN T1
Switch
IAD
PRIs
IP PBX
Call management may be centralized (example) or
distributed, which would include call management
intelligence at each site
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IP PBX SIP Hand-Off
Internet Traffic
Voice Traffic
Media Gateway
IP Network
Gateway Router
Existing Class 5 Switch
Edge Router
Similar to a Dynamic T1, but the IAD is replaced
with a Router and the hand-off is IP
SIP Hand-Off
Router
Switch
IP PBX
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IP Videoconferencing

• Benefits
• Replaces Legacy ISDN
• No per minute charges
• Challenges
• Equipment upgrades for all parties
• Quality of Video

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Future

• A panel of 30 experts in the field of VoIP was
  assembled recently, and asked about the future of
  VoIP. The clear consensus of the experts was
  that the future of VoIP is more about a broad,
  new landscape that brings messaging, services,
  and apps to the desktop than simply about voice.
  Phil Edholm, VP of network architecture for
  Nortel Networks' Optical Ethernet and Enterprise
  Product Portfolio business units, suggests that
  an appropriate term for this converged networking
  is IP Multimedia.
• Like other experts, Doug Fink, VP of IP
  communications for Calence, notes that SIP and
  presence likely will lead the way, with
  multichannel requests such as email and the Web
  looking more and more like real-time requests.
  Greg Welch, president and CEO of GlobalTouch
  Telecom, points to VoIP services and applications
  that listen to an e-mail on a handheld device or
  forwards voicemail as an email attachment.
  Telephone, fax, e-mail, and video conferencing no
  longer are fixed to locations. "Click a contact
  in Outlook or say a name to locate that person no
  matter where or on what device," adds Welch.