Cambium PTP 450 series, Руководство пользователя

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PMP 450 Configuration and User Guide Glossary
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ptp-450 (July 2014)
PPPoE Point to Point Protocol over Ethernet. Supported on BHSs for
operators who use PPPoE in other parts of their network
operators who want to deploy PPPoE to realize per-subscriber authentication, metrics,
and usage control.
PPTP Point to Point Tunneling Protocol. One of several virtual private network
implementations. Regardless of whether the Network Address Translation (NAT)
feature enabled, Subscriber Modules support VPNs that are based on this protocol.
Protective Earth Connection to earth (which has a charge of 0 volts). Also known as ground.
Proxy Server Network computer that isolates another from the Internet. The proxy server
communicates for the other computer, and sends replies to only the appropriate
computer, which has an IP address that is not unique or not registered.
PTMP See Point-to-Multipoint Protocol.
Quick Start Interface page that requires minimal configuration for initial module operation.
Radio Signal
Strength Indicator
Relative measure of the strength of a received signal. An acceptable link displays an
Radio Signal Strength Indicator (RSSI) value of greater than 700.
Recharging Resumed accumulation of data in available data space (buckets). See Buckets.
Reflection Change of direction and reduction of amplitude of a signal that encounters an object
larger than the wavelength. Reflection may cause an additional copy of the wavelength
to arrive after the original, unobstructed wavelength arrives. This causes partial
cancellation of the signal and may render the link unacceptable. However, in some
instances where the direct signal cannot be received, the reflected copy may be
received and render an otherwise unacceptable link acceptable.
Region Code A parameter that offers multiple fixed selections, each of which automatically
implements frequency band range restrictions for the selected region. Units shipped to
regions other than the United States must be configured with the corresponding Region
Code to comply with local regulatory requirements.
Registrations MIB Management Information Base file that defines registrations for global items such as
product identities and product components. See also Management Information Base.
RetransLimitExp
Field
This field displays how many times the retransmit limit has expired.
RF Radio frequency. How many times each second a cycle in the antenna occurs, from
positive to negative and back to positive amplitude.
RJ-11 Standard cable that is typically used for telephone line or modem connection.
RJ-45 Standard cable that is typically used for Ethernet connection. This cable may be wired
as straight-through or as crossover. Later modules auto-sense whether the cable is
straight-through or crossover.
Router Network element that uses the logical (IP) address of another to pass data to only the
intended recipient. Compare to Switch and Bridge.