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Broadband ISP Technology

 » Narrowband ISDN
Broadband is a general term for any telecoms technology that can carry a lot of data, using a wide range (band) of frequencies, over fixed telephone lines or wireless communication. In the UK broadband is most typically used to describe high-speed Internet access (see below).
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network cable snake
  1. Fixed Line Narrowband
  2. Fixed Line Broadband
  3. Wireless Broadband
 Narrowband ISDN
BT ISDN Highway Box
Integrated Services Digital Network (ISDN) initially works in a similar way to Dialup by connecting via a standard copper based telephone line. However, unlike dialup, ISDN is almost entirely digital and able to send information at speeds of up to 64Kbps downstream and upstream. This can be increased to 128Kbps using a second channel via an additional telephone line, otherwise known as 'bonding'.

Sadly the technology often required a line to be converted from analogue to digital and two channels were needed for maximum speed, incurring additional costs. ISDN's advantages were that it ran through a stable and highly reliable digital network, meaning that you always got the performance expected; though ISP congestion could still hamper quality.

BT's consumer grade ISDN products (HomeHighway, Midband) could also connect to dialup ISP's.

ISDN Advantages
- Extremely low latency full digital connection.
- Good for specific kinds of professional VoIP.
- Reliable connection.
ISDN Disadvantages
- Maximum speed of just 128Kbps.
- Expensive compared with broadband.
- Very little support left (being phased out).
Related ISPreview.co.uk Content:
* Dialup/ISDN ISP Listings (Unmetered / Free Calls)
* Dialup/ISDN ISP Listings (Local Call Rates)
* Dialup/ISDN ISP Reviews
* Dialup/ISDN Discussion Forum
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