Evolution in Broadband Technology and Future of Wireless Broadband - Adoption, Usage, and Global Impact of Broadband Technologies - page 239

APPENDIX A
Data definitions provided by ITU (2009)
Cable Modem Internet Subscribers : Internet subscribers using modems attached to cable television
networks. Speed should be equal to, or greater than, 256 kbit/s, in one or both directions
DSL Internet Subscribers : Internet subscribers using Digital Subscriber Line (DSL) technology. Speed
should be equal to, or greater than, 256 kbit/s, in one or both directions
Fixed Broadband Internet Subscribers: Total fixed broadband Internet subscribers refers to a sub-
scriber who pays for high-speed access to the public Internet (a TCP/IP connection), at speeds equal to,
or greater than, 256 kbit/s, in one or both directions. This can include cable modem, DSL, leased lines,
fibre-to-the-home/business and other broadband subscribers. This total is measured irrespective of the
method of payment.
Total Fixed Broadband Subscribers Per 100 Inhabitants Number of total broadband subscribers
divided by the population and multiplied by 100.
Mobile Broadband Subscriptions: Number of subscriptions to mobile cellular networks with access to
data communications at broadband speeds greater than or equal to 256 kbit/s in one or both directions.
Mobile Broadband Subscriptions Per 100 Inhabitants: Calculated by dividing the number of mobile
broadband subscriptions by the population and multiplying by 100.
Main (Fixed) Telephone Lines in Operation: A main line is a (fixed) telephone line connecting the
subscriber's terminal equipment to the public switched network and which has a dedicated port in the
telephone exchange equipment. It may not be the same as an access line or a subscriber. The number of
ISDN channels is included.
Mobile Cellular Telephone Subscriptions - (Post-Paid + Pre-Paid): Refers to the subscriptions to a
public mobile telephone service and provides access to Public Switched Telephone Network (PSTN)
using cellular technology. This can include analogue and digital cellular systems. This also includes
subscriptions to IMT-2000 (Third Generation, 3G).
Note: For farther detail definition, see ITU (2009).
Appendix B
Functional data arise from data consisting of repeated measurements of objects over time. Functional
data analysis or FDA basically involves estimating individual curves often from noisy data. Let us
consider a large array or a N x p matrix of time series Y (tij) for i = 1,...N where N is the “number” of
time series and discrete sampling points j = 1,... p and p < N. We use the functional data analysis (FDA)
approach to analyze the broadband subscription data for both fixed and wireless access. FDA is a fairly