1. Types of Access

2. Types of Access
Types of Access refers to different modes of transportation that gives customers ACCESS into the NetFortris network, via their “Local Loop”.
These types of access are: T1
DS3
DSL
Cable
MEoC
Fiber

3. Internet T1
T1 (transmission system 1): A Mbps point-to-point, dedicated, digital circuit, using two wire pairs (one for transmit, one for receive) and time division multiplexing (TDM) to interleave Kbps voice or data channels.
TDM (Time-division multiplexing): is a type of digital (or rarely analog) multiplexing in which two or more bit streams or signals are transferred appearing simultaneously as sub-channels in one communication channel, but are physically taking turns on the channel. 

4. DS3
DS3 (Digital Signal Level 3): DS-3 equates to 28 T-1 lines, or million bits per second (roughly Mbps upstream/downstream speeds).
DS-3s have enough bandwidth to allow very large database transferring over busy wide area networks and the capability of handling 672 simultaneous voice conversations. 

5. DSL
DSL stands for digital subscriber line, this is a line that turns your phone line into a high-speed digital link to Internet access.
Advantages of DSL:
You can leave your Internet connection open and still use the phone line for voice calls.
DSL doesn't necessarily require new wiring; it can use the phone line you already have.
But there are disadvantages:
A DSL connection works better when you are closer to the provider's central office.
The connection is faster for receiving data than it is for sending data over the Internet.
The service is not available everywhere

6. DSL Technology
Speed
The precise speed of a connection depends on the variety of xDSL deployed.
DSL is a distance-sensitive technology.
DSL works on the unused (high) frequencies of the telephone line.

7. DSL Technology Availability
To be eligible for DSL service, the phone line involved must be "qualified."
The home or business must lie within the distance limitations of DSL (18,000 feet).
This phone line must also possess sufficient electrical quality characteristics.

8. DSL availability of bandwidth
Cable length (feet)
Bandwidth availability (kbps)
18,000
1,544
16,000
2,048
12,000
6,312
9,000
8,448

9. xDSL Family Tree The xDSL "family tree" includes two main branches
Symmetric DSL  services provide identical data rates upstream and downstream.
Asymmetric DSL provides relatively lower rates upstream but higher rates downstream.

10. ADSL
Asymmetric Digital Subscriber Line was designed to provide higher downstream data rates at the expense of upstream rates.
Example:
Many typical uses of the Web -- such as file downloads and general web browsing -- benefit from greater downstream bandwidth but require relatively little in the opposite direction.

11. SDSL
Symmetric DSL(SDSL) improves on the older HDSL technology by implementing the same basic data rate (1,544 kbps) while requiring only a single phone line.
SDSL supports data rates up to 3,088 Kbps.

12. Cable
Like DSL, cable technology provides a high-bandwidth, always-on connection to the Internet

13. Broadband Cable
An asymmetric cable modem scheme is most common. The downstream channel has a much higher bandwidth allocation (faster data rate) than the upstream, primarily because Internet applications tend to be asymmetric in nature.

14. Broadband Cable Cable Modem Advantages Cable Modem Disadvantages
Fast data transfers
Competitive pricing against competing technologies
Cable Modem Disadvantages
The available bandwidth depends on the number of users on the local cable TV line segment.
There is an asymmetrical transfer rate. Upstream is slower than downstream.

15. DSL & Cable Modem
Cable modem technology delivers shared bandwidth within the local neighborhood
DSL delivers dedicated local bandwidth.

16. What is Managed Ethernet?
IT’S ALL ABOUT SPEED!!!

17. What is Managed Ethernet?
Managed Ethernet over Copper
High Speed Ethernet Service
Bandwidth capacity range from 5 Mpbs to 90 Mbps

18. Three Words to Remember…
Reliable
Scalable
Flexible

19. How ME Works

20. ME - Target Customers T1s, Multiple T1s, DS3 Multiple Locations
High Bandwidth Requirements
Consolidation of Different Circuits
Consolidation of Voice & Data Services
No Contract or Contract Ending Soon
Within Qualified CO

21. Competitive ComparisonsME
DSL
T-1 / DS1
T-3 / DS3
Speed
5 Mega bits per second (Mbps)
Scalable to 90 Mbps
1.5M/384 Kbps
1.54 Mbps/sec
Scalable in 1.54 Mbps/sec increments
45 Mbps
Cost
See pricing sheet, but ~$395/month with 3 year contract per ME
$99 per month
$ per month per T-1
$2-5K per month per T-3
Installation time
2 weeks
2-3 weeks
1-2 months
Service Level
99.999% up time
No service level commitments
Equipment requirements
Small Ethernet Device
No Router required for CAT5/RJ45
Inexpensive Modem
Router, costs an additional $1-2K
Risk of router outage
Router, costs an add’l $10-20K

22. Fiber Optics
A data transmission consisting of glass fibers. Light-emitting diodes (LEDs) send light through the fiber to a detector, which then converts the light back into electrical signals.

23. Dark Fiber
An inactive fiber-optic strand without electronics or optronics. Dark fiber is not connected transmitters, receivers and regenerators.

24. SONET RING
SONET that is self healing. Within the Bay Area there are several SONET rings deployed and shared by several CLECs (Competitive Local Exchange Carriers). The advantage of a SONET ring is that if the ring gets cut, the call reverses to the carrier switch.

25. THANK YOU!