TCP/IP - VoIP business

(5 dagar)

VoIP business

VoIP, Voice over IP has become very popular but few really understand how to make it in practise life and even less success stories. This class material and content is based on our knowledge and experience of building large VoIP network, and make is success story.

Learning by doing

This class is supposed for systems integrator/network technicians who will learn how IP-based telephony works into the deep, as well as business aspects for companies intended to set-up VoIP. This is done by mixing theory with practise in all steps. The class is balanced almost 50/50 when it comes to theory and practise.

Class focus

The focus is on how to construct and set-up the infrastructure with gatekeepers and gateways, and install end users equipment in various environments behind firewalls and dhcp/nat-routers. Also we look on how to build and provide IP telephony with wireless network environments like 802.11abg.

Migrating telecon and datacom

We learn how classical telephony systems such as POTS and GSM can be integrated/interconnected and how to add various services to gain extra functionality like IVR and also video and hi-fi radio.

After the class students will be able to:

  • Understand POTS basic functions
  • Understand H.323 basic functions
  • Understand SIP basic functions
  • Understand codecs for VoIP
  • Callback system basics with SMS and gsm-gateways/hosting
  • Maintain security of VoIP implementations
  • Building IP-tunnels for VoIP
  • Soft Switch “ Open H.323” gnugk slave/proxy, master, leaf and neighbour set-up
  • Billing system functions , adding/removing subscribers and issue prepayed cards
  • VoIP routing and terminating set-ups
  • Deep insight in how to set-up IP telephony in end user environments
  • Handle portforwarding in firewalls and NAPT/NAT in most broadband routers
  • Cable modem configuration and function
  • Setup Wireless VoIP Network with 802.11abg SA/AP for VoIP
  • Howto migrate Telekom and Datacom
  • Business ideas and concepts

Knowledge needed to attend this class

Participants must have experience of working with computers as advanced user and basic knowledge of datacom and telecom. Also basic knowledge of TCP/IP is necessary. Special introductions class will be held in front of this class if necessary.


The entire class is one week full time 09.00 to 16.45. Days are divided by lunch, before lunch we study theory and after lunch we practise with exercises and labs. There are after class doings for the one who like.

Books and class material

We have our own class material which consists of a study folder which contains most, in addition to this we also have a book IP Telephony with H.323 ISBN: 0471393436 John Wiley & Sons Inc

(Internet Communications Using SIP ISBN: 0471413992 John Wiley & Sons Inc ). In addition to the books we also have a lab with various IP phones and routers as well wireless equipment and PC's.


Detailed content and schema

Day 1 (09.00-12.00)

TCP/IP introduction

  • IP addresses, subnet masks
  • Nameserver
  • Services TCP/UDP
  • Router/NAT/Firewall
  • Ping & traceroute

POTS introduction

  • PBX functionality
  • Circuit call connection, mantes and release
  • Voice and Video bandwidth demands
  • Calling and called leg

Multimedia Transport on IP Networks

  • Voice, Conversational Text, Facsimile, Video
  • Transport of Conversational Media on the Internet by Using RTP
  • Codecs and compression

Day 1 (13.00-16.45)

  • Point-to-Point Call: Signaling
  • Multi-Point Conference
  • Inter-Domain Communication, gateways & gatekeepers
  • H.323 Security
  • H.323,Generic Security Protocols, and Firewalls
  • H.323 Mobility
  • QoS Principles and Application Level QoS
  • Future services for H.323


  • SIP-enabled communications, multimedia, and conferencing
  • Elements of an SIP network, Including user agents, servers, and location services
  • Basics of SIP Security such as authentication, encryption, digital signatures, and firewalls
  • Future services for SIP
Customer account parameters

PIN, H.323-ID, username, password
Billing system Web-login


  1. Configure your Windows XP/2000/98 PC for internet connectivity with TCP/IP and some other services
  2. Localising conflicting applications.
  3. Installing Softphone on PC and make successful calls
  4. Configuring Hardphone and make successful calls
    Detailed content and schema


Day 2 (09.00-12.00)

Call types

  • PC to PC
  • PC to PHONE
  • PHONE to PC
  • Direct calls
  • Classic Call-back
  • GSM initiated
  • Web initiated
  • Leased IP line / Delegated IP Line

Account types

  • Regular Member / Contract Subscriber
  • Prepayed IP cards
  • Prepayed PIN cards

Billing system functions

  • Basics functions and concept
  • Adding/Removing subscribers
  • Issue and maintain prepaid cards
  • Checking call-logs
  • Maintain rate tables
  • Add and remove gateways and gatekeepers
  • CDR
  • Reseller account

Call back system functions

  • Basics functions and concept
  • Adding/Removing subscribers
  • Issue and maintain prepayed cards
  • Checking call-logs
  • Maintain ratetables
  • Add and remove gateways and gatekeepers
  • CDR
  • Reseller account

Day 2 (13.00-16.45)


  1. Working with reseller and admin account
  2. Adding/Removing subscribers
  3. Issue and maintain prepaid cards
  4. Checking call-logs, find errors and causes
  5. Maintain rate tables
  6. Learn how to make calls and help customer with calls

Day 3


  • Basics functions and concept
  • Maintain GSM-gateway
  • GSM-gateways/hosting
  • GSM phone types and SIM cards
  • Antennas and cells capacity
  • Call routing
  • IVR programming


  1. Change phones in GSM-gateway
  2. Make calls through GSM-gateway/host

Day 3 (13.00-16.45)
User/Customer home enviroment CPE

  • TP cables and equipment
  • How to successfully set-up IP telephony in end user environments:
    • ATA186
    • SoftPhone
    • CallToAll hardphone YWH100

User/Customer SOHO devices

  • Portforwarding
  • Stateful/Stateless Firewall's
  • NAPT/NAT in most broadband routers.
  • DHCP and Static IP addresses.
  • Private / Public network.
  • Cable modem configuration and function.
  • Work with broadband routers in practise:
    • D-Link –family (D-LINK 604)
    • Alcaltel/Thomson -family and the
      "speed Touch".
    • Zyxel -family of broadband routers.
    • TeleWell -family of broadband (TW-EA200 & TW-EA-500).
  • And general consepts for other SOHO devices


  1. Setup of CPE and local network enviroment
  2. Configuration of all our IP phones
  3. Install and configure broadband routers for one IP phone.
  4. Install and configure broadband routers for many IP phones
  5. Find errors in customer equipment
  6. Upgrade YWH100 firmware
  7. Leased IP line calls and configuration

Day 4 (09.00-12.00)
Spare time for exercises and additional questions

Day 4 (13.00-16.45)
Exotic solutions for customers/users

Building IP-tunnels for VoIP on Windows

Using Windows to share Internet

Soft Switch “ Open H.323” gnugk slave/proxy

  1. Build IP tunnel in Windows for IP telephony
  2. Share internet with Windows
  3. Setup soft switch slave/proxy


Day 5 (09.00-12.00)

The function and operation of OpenH323 gatekeeper

  • Master
  • Leaf
  • Neighbour
  • VoIP routing
  • Terminating
  • Howto migrate Telekom and Datacom

Setup Wireless VoIP Network with 802.11abg SA/AP for VoIP

  • 802.11abg fundamentals, SA, AP
  • Capacity, Coverage and antennas
  • Mobility and VoIP

Howto migrate Telekom and Datacom

  • Terminating in POTS
  • Terminating in GSM
  • Terminating companies

Business ideas and concepts

Day 5 (13.00-16.45)

  1. Setup of one Master softswitch
  2. Setup of Wireless equipment for VoIP
  3. Changing routes to terminating company
  4. Failsearching in softswitch and wireless enviroment