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ATM over passive optical network (APON)

APON(ATM over Passive Optical Network) is a network configuration in which information is transmitted in optical networks using the ATM protocol, for which the ATM header is supplemented by the APON overhead.

If APON is used in the access network, the ATM cells transmitted from the exchange to the customer, i.e. downstream, are distributed to all subscribers. In the opposite direction, upstream, the cells are joined without collision and transmitted to the exchange, with the necessary synchronization via the APON overhead. APON is a cost-effective technology for Fiber to the Home( FTTH), which is characterized by the high quality of Operation, Administration, and Maintenance( OAM).

The different PON variants that can be used in the access area

The different PON variants that can be used in the access area

The data rates are 622 Mbit/s downstream and 155 Mbit/s upstream. APON transmits the signals between the optical line termination( OLT) and the optical network terminations( ONT) in wavelength division multiplexing(WDM). In Recommendation G.983.3, the International Telecommunication Union( ITU) specified an additional wavelength band in addition to the existing downstream band between 1,480 nm and 1,500 nm for future applications such as video transmissions. This concept is realized in BPON and uses the wavelength band between 1,539 nm and 1,565 nm.

Informations:
Englisch: ATM over passive optical network - APON
Updated at: 22.04.2013
#Words: 195
Links: asynchronous transfer mode (ATM), network, configuration (CFG), information, protocol
Translations: DE
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