FPGA
Field Programmable Gate Array
frame
A frame, starting with a header, is a string of bytes with a specified length. Frame length
is represented by the sampling circle or the total number of bytes sampled during a circle.
A header comprises one or a number of bytes with pre-specified values. In other words,
a header is a code segment that reflects the distribution (diagram) of the elements pre-
specified by the sending and receiving parties.
Frame loss ratio
A ratio, is expressed as a percentage, of the number of service frames not delivered
divided by the total number of service frames during time interval T, where the number
of service frames not delivered is the difference between the number of service frames
arriving at the ingress ETH flow point and the number of service frames delivered at the
egress ETH flow point in a point-to-point ETH connection.
Free-run mode
An operating condition of a clock, the output signal of which is strongly influenced by
the oscillating element and not controlled by servo phase-locking techniques. In this
mode the clock has never had a network reference input, or the clock has lost external
reference and has no access to stored data, that could be acquired from a previously
connected external reference. Free-run begins when the clock output no longer reflects
the influence of a connected external reference, or transition from it. Free-run terminates
when the clock output has achieved lock to an external reference.
frequency diversity
A diversity scheme in which two or more microwave frequencies with a certain
frequency interval are used to transmit/receive the same signal and selection is then
performed between the two signals to ease the impact of fading.
FTP
File Transfer Protocol
full-duplex
A full-duplex, or sometimes double-duplex system, allows communication in both
directions, and, unlike half-duplex, allows this to happen simultaneously. Land-line
telephone networks are full-duplex, since they allow both callers to speak and be heard
at the same time. A good analogy for a full-duplex system would be a two-lane road with
one lane for each direction.
A.8 G
Gain
The difference between the optical power from the input optical interface of the optical
amplifier and the optical power from the output optical interface of the jumper fiber,
which expressed in dB.
Gateway IP
When an NE accesses a remote network management system or NE, a router can be used
to enable the TCP/IP communication. In this case, the IP address of the router is the
gateway IP. Only the gateway NE requires the IP address. The IP address itself cannot
identify the uniqueness of an NE. The same IP addresses may exist in different TCP/IP
networks. An NE may have multiple IP addresses, for example, one IP address of the
network and one IP address of the Ethernet port.
Gateway Network
Element
A network element that is used for communication between the NE application layer and
the NM application layer.
GE
Gigabit Ethernet
Generic Framing
Procedure
A framing and encapsulation method which can be applied to any data type. It has been
standardized by ITU-T SG15.
GFP
A Glossary and Acronyms
OptiX OSN 550 Multi-Service CPE Optical Transmission
System
Configuration Guide
A-14
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Issue 02 (2011-06-30)