Section 1: Packetizing Voice
Understanding and review of Transmission, Switching and Signaling
• Introduction to the VoIP Standards (ITU, IETF, etc)
• TDM
• Compression (PCM)
Companding differences (A-Law and Mµ Law)
Introduction to Packet Switching
• OSI Model
• Addressing and Forwarding
• Packet Switching
• RTP Packets
Transmitting the VoIP Packets
• 20 Millisecond Packets
• 60 Millisecond Packets
• The Framing format of the VoIP Packet
• Packet Analysis and other frame sizes
Compression Techniques
• CODECS
• LPC
• G.723
• G.729
• Others
Section 2: TCP/IP Review
TCP vs. UDP
• Connection Oriented Protocols (TCP)
• Connectionless Oriented Protocols (UDP)
• TCP Slow Start Congestion Window Size (and Buffering Behavior)
• TCP and IP Packet Format and Headers
• UDP Packet and Headers
DHCP
DNS
Traceroute
Ping
Multicast
LDAP
Section 3: RTTP
RTTP Architecture
• RTP
• RTCP
• RTP Ports
• RTP Use
RTP Profiles
• Payloads
• Types
• NTP and RTP timestamps
• Silence Suppression
• Jitter
Mixers
RTP Headers Defined
• UDP Packet with RTP and VoIP
• Mandatory Fields
• Padding Function
• Extensions
• Payload Types
• Timestamps
RTCP
• QoS and Round trip delay
• Reports (Sender, Receiver)
• Descriptors
• Other forms of RTCP Packets
Section 4: VoIP Technologies
Understanding and Controlling Delay
Determining and Calculating Sources of Delay
Controlling Jitter
• Buffers
• DSPs
• Latency Calculations
• Multilink PPP with LFI
LFI Functionality
Serialization Delay and Overcoming It
Understanding and managing Queuing Delay
LLQ
CAP
RSVP
DiffServ
IP TOS
VPN
Section 5: H.323 Protocols
H.323 Architecture
Components
Standards (ITU)
H.323 Terminal Equipment
H.323 Gateways
Gatekeepers
Call Setup
Call Connections
Fast Start
QoS with H.323
Section 6: SIP Protocols
SIP Architecture
SIP Standards (IETF)
• Naming Conventions
• Requests
• Advertisements
• Indicators
• Registration
SIP Protocol Defined
• Proxy
• Invite
• VIA Field and Operation
• Loop and Spiral Detection
• Routing
• Max-Forwarding
• Dialogs
• Commands and Sequencing
SDP
• RFC 2327 SDP
• Call Negotiation
• Ringing Messages
SIP Reliability
Stateful and Stateless Connections
Mobility
RTSP
Section 7: Gateways
Introduction to Gateways
Gateway Protocols
MCGP and MEGACO
MEGACO and H.248
Justification for MEGACO
MEGACO Protocols Defined
Evolution of the Gateway Protocols
Section 8: Security Issues
Components of a Secure Architecture
Firewalls
DMZ
NAT
Packet Filtering and Shaping
Attacks
SYN
DOS
Firewall Attacks
Issues and Answers
Section 9: Implementing of VoIP
Cisco Products
Avaya
Nortel
Others
Final Review and QA
Join the University of Arizona South for a two-day overview class to gain a deeper understanding of how to secure your implementation of a VoIP solution for your enterprise. You'll receive quality lecture combined with practical experience information from a professional who has installed and managed VoIP implamentation. You'll learn and see a variety of security devices available for your network, along with tips and tricks for securing the voice network. We'll also discuss wireless LAN's running VoIP traffic and ways to secure this doubly challenging setup. Class size is EXTREMELY limited to ensure hands-on time and individual attention for everyone.
Topical Outline
VoIP Security and Potential Problems: Protecting Your Network
Understanding the fundamentals of IP Telephony
Tools
Security Polices and Procedures
VPNs
Cryptography Systems
IPSec
Other Security Protocols
Phone Hardening
Securing your Network
Buyers Checklist
INSTRUCTOR: Bud Bates
40 clock hours