Glossary
Power Blazer
811
Generic Framing Procedure (GFP)
Generic Framing Procedure (GFP)
Generic framing procedure (GFP), defined in ITU recommendation
G.7041/Y.1303, is a framing mechanism to transport packet-based client
signals, such as Ethernet, Fibre Channel, ESCON, FICON, over
fixed-data-rate optical channels. As such, GFP provides a single, flexible
mechanism to map these client signals into SONET/SDH and OTN
networks, as shown in figure below.
Client Signal Mapping over GFP
Prior to the introduction of GFP, several methods had been used to
transport packet services over SONET/SDH networks. The first method was
Asynchronous Transfer Mode (ATM) Adaptation Layer 5 (AAL 5) over
SONET/SDH. ATM is a very efficient switching and multiplexing technology,
whose transfer rates scale with SONET/SDH rates. However, ATM does not
make the most efficient use of bandwidth because the payload data is
separated into groups of 48 bytes, called cells, with an additional 5-byte
header of software overhead. It became immediately apparent that almost
10 % of the bandwidth would be lost. In addition, certain types of data
required even more ATM overhead.
Содержание Power Blazer 88200NGE
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Страница 64: ...Test Setup Test Applications 54 88000 Series OTN BERT...
Страница 65: ...Test Setup Test Applications Power Blazer 55 OTN BERT OTU4 for 88200NGE 890 890NGE OTU4 for 88260...
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Страница 789: ...Glossary Power Blazer 779 10G Ethernet Client The following figure presents a typical network application...
Страница 803: ...Glossary Power Blazer 793 Ethernet Cables Straight Through Cable 1000 Mbit s Crossover Cable 1000 Mbit s...
Страница 847: ...Glossary Power Blazer 837 SONET DSn SDH PDH The GUI Grid indicates the TUG 2 x and TUG 3 x values...
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