Internet
access Technologies in Sri Lanka
Broadband
Technologies
ADSL - Uses
typical twisted pair cable that come home. Maximum downstream up to 8 Mbps. Divide the voice and data signals on the telephone line
into three frequency
bands.
Internet Leased
Line - Internet leased lines are usually available at
speeds of 64k, 128k, 256k, and 512k, T1 or E1).
Optical Fiber -
Technology which bring fiber step
closer to the subscriber. In Sri Lanka vastly use in large organizations. Can go up to
speed of up to 1 Gbps
HSPA -
Supports data rates up to 27 Mbit/s in
the downlink and 5.8 Mbit/s in the uplink. In Sri Lanka do not provide
unlimited packagers.
Wi-Max
- Can go for over a much greater range. Point-to-multi point: last-mile internet access. People
can go
up to 52
Mbps. Good solution for the people who can’t get ADSL connection due to long distance.
LMDS - LMDS offers a microwave solution with
a reduced cost per link. It transmits in a point to multi-point fashion over a wide coverage
area. LMDS channel is capable of 45 Mbps
downstream.
CDMA - Can
achieve maximum capacity of 2Mbps. Popular as wireless internet access
technology in Sri Lanka.
Wi-Fi
- Based on the IEEE 802.11x standard
and transmitting in unlicensed spectrum at 2.4 GHz. support data rates up to 54
Mbps.
Narrow
Technologies
Dial-up - Uses
the facilities of the public switched telephone network (PSTN). Use same
frequency voice band of 0- 4 kHz. Few years ago very popular, but only can have
56 kbps.
ISDN - Much
faster speed of 256 kbits/s. But not considered as broadband. Not popular because
had to use separate equipments.
WAP - Most
use of WAP involves accessing the mobile web from a mobile phone. People can’t go
much capacity through this wireless mobile technology.
GPRS - Can
achieve maximum speeds of up to 9.6 kbps. This is mobile wireless technology. Mainly used
for web browsing.
