I have been asked about how I can access Internet. For friends in Shanghai, they are curious about the broadband, which is new to the city.
Dial-up: Basically, residents in Shanghai have lots of choices for Internet access from home.
- The China Telecom is the largest and most popular provider of dial-up access.
Telephone #: 8163
The Internet service fee will be charged to the caller’s telephone bill. This is very convenience. We don’t need to apply a user account. (What about other regions in the world? Writhe comments and let us hear you.)
- Their there many other ISPs are providing Internet Access card. Users buy the cards and can dial the number on the card for predefined period of Internet Access time. It is also good and cheaper than 8163 service.
There are many service providers are competing to gain more market share here in Shanghai
- China Telecom is selling ADSL – the method to use normal telephone line to transmit digital signals, though greatly speed-up the data transition.
- Cable TV providers are persuading users to use cable modem to access Internet.
- China Unicom, which don’t have the fixed line telephone are using wireless technology to gain its market. User with wireless LAN adaptor can subscribe to their services.
- Other broadband providers like Great Wall Broadband – the provider I chose. They are using traditional LAN technologies for users in a residential area.
Let me share some facts of the broadband I am using.
Speed The inbound network cable provides 100M access to other servers on the LAN, and provide pretty good Internet access rate (not very sure about the exact bandwidth now) I tried to download some files, the transfer rate displayed on downloading dialog box is typically 40 KB/sec to 100 KB/sec.
IP address GWBN is providing dynamic, real IP address.
- Dynamic IP GWBN uses DHCP to allocate IP addresses on a LAN. Heroically, the IP may change. However, because currently the number of subscribers is far less than number of IPs in the IP pool, the IP addresses for my computers never changed. So I can safely direct my domain http://home.wangjianshuo.com to my IP address 188.8.131.52.
- Real IP Unlike China Telecom broadband and other broadband who are using NAT (Network Address Translation), GWBN provides real IP address. I queried my IP address 184.108.40.206 in www.apnic.net, the result looks like this
inetnum: 220.127.116.11 – 18.104.22.168
descr: FOR GWBN SHANGHAI # 145 RESIDENTIAL COMMUNITY BROADBAND NETWORK USERS’ BROADBAND ACCESS
changed: firstname.lastname@example.org 20020715
status: ALLOCATED PORTABLE
I guess the so-called “# 145 RESIDENTIAL COMMUNITY” refers to Vanke Waltz Garden. That means 773 families are sharing the 255 IP addresses. It is pretty good, since only about 5% of the residents are subscribers now.