Welcome Dr' Changs Data Communications

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WelcomeDr. Changs Data Communications
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Southwest Gas has used technology to meet The
Growth Challenge
1,784
Customers
Employees
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Southwest Gas has used technology to meet The
Growth Challenge
1,784
Customers
Employees
2,525
Employees - Actual
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Southwest Gas has used technology to meet The
Growth Challenge
1,784
Customers per employee 2006 - 706 1996 -
450
4,564
Customers
Employees - Projected
Employees
2,525
Employees - Actual
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Using Technology in Meter Reading
Mobile Data Collector
Customer Service System (CSS)
120K meters per person per month (when area is
fully saturated with ERTs)
8K meters per person per month
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Using Technology in the Field - Construction
Maintenance
Gas Facilities Data
Gas Facilities Data
Inspection Orders



WMS (Office)
Work Management System (WMS)

Facilities Orders
Facilities Orders
Construction Maintenance Orders

Materials Vehicle Information
WMS Users Mobile 850 Office
1,550
Facilities Maps (EMRS)
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Production Environment
On-Line Mapping
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WelcomeDr. Changs Data Communications
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WHAT IS A SWITCH?

• DEFINITION A network device that filters,
  forwards, and floods frames based on the
  destination address of each frame. The switch
  operates at the data link layer of the Open
  System Interconnection (OSI) reference model.

Internetworking Technologies Handbook, Second
Edition, Kevin Downes, Merilee Ford, H. Kim Lew,
Steve Spanier, Tim Stevenson, MacMillan
Technical Publishing, 1998
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WHAT IS A ROUTER?

• DEFINITION An OSI network layer device that uses
  one or more metrics to determine the optimal path
  along which network traffic should be forwarded.
  Routers forward packets from one network to
  another based on network layer information.
  

Internetworking Technologies Handbook, Second
Edition, Kevin Downes, Merilee Ford, H. Kim Lew,
Steve Spanier, Tim Stevenson, MacMillan
Technical Publishing, 1998
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WHAT IS A SUBNET?

• DEFINITION In IP networks, subnetworks are
  networks arbitrarily segmented by a network
  administrator in order to provide a multilevel,
  hierarchical routing structure while shielding
  the subnetwork from the addressing complexity of
  attached networks.

Internetworking Technologies Handbook, Second
Edition, Kevin Downes, Merilee Ford, H. Kim Lew,
Steve Spanier, Tim Stevenson, MacMillan
Technical Publishing, 1998
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WHAT IS A SUBNET?

• How does it work
• IP Address
• 192 168 1 1
• 11000000.10101000.00000001.00000001
• Subnet MASK
• 255 255 255 0
• 11111111.11111111.11111111.00000000

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WHAT IS A NETWORK?

• DEFINITION A collection of computers, printers,
  routers, switches, and other devices that are
  able to communicate with each other over some
  transmission medium.

Internetworking Technologies Handbook, Second
Edition, Kevin Downes, Merilee Ford, H. Kim Lew,
Steve Spanier, Tim Stevenson, MacMillan
Technical Publishing, 1998
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HOW DOES IT ALL FIT TOGETHER?
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OVERVIEW OF SWGAS DATA NETWORK
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OVERVIEW OF SWGAS DATA NETWORK
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THANK YOU