Cambium Networks PTP 450 Series, Configuration Manual

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Chapter 5: Troubleshooting Logs
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10
Term Definition
Default Mode Device that enables the operator to regain control of a module that has
been locked by the No Remote Access feature, the 802.3 Link Disable
feature, or a password or IP address that cannot be recalled. This device
can be either fabricated on site or ordered.
PMP See Point-to-Multipoint Protocol.
Point-to-Multipoint
Protocol Defined in RFC 2178, which specifies that data that originates from a
central network element can be received by all other network elements,
but data that originates from a non-central network element can be
received by only the central network element. See
http:
//www.faqs.org/rfcs/rfc2178.html. Also referenced as PMP.
PPPoE Point to Point Protocol over Ethernet. Supported on SMs 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.
PPS Packet Per Second
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.
PTP A Point-to-Point connection refers to a communications connection
between two nodes or endpoints.
Radio Signal Strength
Indicator Relative measure of the strength of a received signal. An acceptable link
displays a Radio Signal Strength Indicator (RSSI) value of greater than
700.
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.