Gary Shuman & George Mallick
Dallas ISD Network Services

infrastructure_dallasisdpreso…
13.2 MB

1. Studying infrastructure deployment for a 1 to 1, specifically as devices go home.
2. Lessons Learned and where we are going and why.
3. Outline
   1. Objective
   2. Dallas ISD System
   3. Mobility Defined
   4. Off campus connection trial
   5. Recommendations
   6. Funding
   7. New eRate Program
4. “To define student mobility and network options”
5. Dallas ISD Network Example:
   1. WAN,
   2. Network Campus LAN,
   3. Wireless, Data Centers,
   4. Digital Classroom, student devices, teacher devices, guest services,
   5. state of the art technology
6. Collapsed data centers down to 2 and
7. 500 virtual servers, and 500 actual servers
8. Fiber upgrades…also upgraded core and LAN in data centers. 40gig in data centers and between data centers. This allows us to keep them in sync.
9. “In a country where we expect free wifi with our coffee, we should definitely demand it in our schools” -President Obama, June 2013.
10. Core of the network to the schools was like a traffic jam – 100 mbps
11. upgraded to 10gbps…feels like an open highway.
12. “There nothing special about wireless networks except that wireless capacity is sometimes less than what you can get, for example, from optical fiber.” Vint Cerf, Leading Telecommunications Architecht, MCI & Google
13. Dallas ISD Network diagram…two data centers. Each data center has a 5 gig connection to internet.
14. Data connection goes to MDF, then 10gig to IDF closets…using Cisco.
15. Dallas is peaking out 3gigs of their 5gigs connection.
16. Data Network Delivered Services
    1. Network connectivity (LAN, Wireless/Mobility)
    2. Video Distribution (TV)
    3. Security Cameras
    4. Telephone & Fax
    5. Unified messaging
    6. Internet access
    7. Time clocks
    8. energy management
17. Mobility: enabling the movement of info to disconnected devices that can be used by a person on the move.
18. “I do not think that the wireless waves I have discovered will have any practical application.” Heinrich Hertz
19. How do radio waves work video: https://www.youtube.com/watch?v=gLMC5R5Me9c
20. The same info resources avail at school should be avail to students at home:
    1. Online textbooks
    2. Cloud Computing
    3. Study Resources
    4. Distance Learning
    5. Equity
21. Urban vs Rural
    1. Urban Challenges: Low income, smartphone only, coverage holes
    2. Rural Challenges: Lack of data services, Distance, Low-bandwidth
22. Wireless study findings
    1. The purpose of the wireless study was to show how the District can provide a wireless connection to students, which do not have any internet connection, throughout the Dallas urban area.
    2. Considerations: Filtering, eRate Coverage, Student Responsibilities, Security\
    3. 802.11 wireless mesh system homing back access points to nearest school or network location
       1. Fairly successful, strung between buildings in less densely populated areas
       2. Pros: No equipment to issue to students, multi-point, district ownership with good ROI, no licensing requirements, on district network
       3. Cons: Expensive, high quanitty of transmitters to maintain; manpower, bandwidth limits, holes in coverage, require coop with City or a Utility
       4. 
          
    4. Microwave – for hard to reach locations, to connected more distant areas
       1. Pros: No equip to issue to students, district ownership,
       2. Cons:
    5. Local ISP such as ATT, Verizon, TW Cable, etc.
       1. Pros: No equip to issue to students, service fully outsourced, available to high%, less staff req’d to manage
       2. Cons: Monthly ongoing bill not feasible in large district, traffic is off-district network; routing to filter is complicated
    6. WiFi Hotspot
    7. Private LTE
       1. Pros: No equipment to issue to students, multipoint, district ownership with fair ROI, on district network
       2. Cons: spectrum avail, high initial capital investment, custom end-device cell card

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