ATM25
Encyclopedia
ATM25 is an ATM version wherein data is transferred at 25.6 Mbit/s over Category 3 cable
Category 3 cable
Category 3 cable, commonly known as Cat 3 or station wire, is an unshielded twisted pair cable designed to reliably carry data up to 10 Mbit/s, with a possible bandwidth of 16 MHz...

. ATM25 has no particular distinctions from other ATM versions. However, ATM25 chipsets are inexpensive in comparison to faster ATM chipsets, having the result of making ATM technology available for small office/home office
Small office/home office
Small office/home office, or SOHO, refers to the category of business or cottage industry which involves from 1 to 10 workers. SOHO can also stand for single office/home office....

 environments. However, these networks no longer have much potential for expansion, as Ethernet
Ethernet
Ethernet is a family of computer networking technologies for local area networks commercially introduced in 1980. Standardized in IEEE 802.3, Ethernet has largely replaced competing wired LAN technologies....

 has become the first choice in this domain.

The WAN
Wide area network
A wide area network is a telecommunication network that covers a broad area . Business and government entities utilize WANs to relay data among employees, clients, buyers, and suppliers from various geographical locations...

 connection side of ATM25 systems often takes place over a fast DSL
Digital Subscriber Line
Digital subscriber line is a family of technologies that provides digital data transmission over the wires of a local telephone network. DSL originally stood for digital subscriber loop. In telecommunications marketing, the term DSL is widely understood to mean Asymmetric Digital Subscriber Line ,...

 variant such as RADSL
Rate-Adaptive Digital Subscriber Line
'Rate-Adaptive Digital Subscriber Line is a variation of Asymmetric Digital Subscriber Line technology. In RADSL the DSL modem adjusts the upstream bandwidth to create a wider frequency band for the downstream traffic...

. DSL is often considered in this case, as its technology is based on an ATM core.
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