Reference Guide for the Model RT328 ISDN Router
Glossary
3
MRU
See
Maximum Receive Unit.
MSN
See
Multiple Subscriber Numbering.
masquerading
A technique by which several hosts share a single IP address for access to the
Internet. This process is an extension of Network Address Translator (NAT).
See also
Network Address Translator.
Maximum Receive
Unit
The size in bytes of the largest packet that can be sent or received.
Most Significant Bit or
Most significant Byte
The portion of a number, address, or field that is farthest left when written as a
single number in conventional hexadecimal ordinary notation. The part of the
number having the most value.
Multilink Protocol
An extension to the point-to-point protocol allowing the combination of both
B channels to provide a single 128 Kbps channel.
See
Point-to-Point Protocol.
Multiple Subscriber
Numbering
A service of the telephone company in which a range of numbers is assigned
to one line. Each device attached to that line (for example, a phone or router)
must know which number it should answer.
National ISDN (NI-1)
Bellcore standard for first phase of ISDN interoperability among U.S.
telephone companies.
NAT
See
Network Address Translator.
netmask
A number that explains which part of an IP address comprises the network
address and which part is the host address on that network. It can be
expressed in dotted-decimal notation or as a number appended to the IP
address. For example, a 28-bit mask starting from the MSB can be shown as
255.255.255.192 or as /28 appended to the IP address.
Network Address
Translator
(or Translation)
A proposal for IP address reuse, where the local IP address is mapped to a
globally unique address.
See
also
masquerading.
NT1 (Network
Termination 1)
Termination device that connects the user’s equipment to the ISDN network.
Converts the local equipment’s four-wire S/T interface to the two-wire
telephone company interface. The NT1 is provided by the telephone company
in most of the world, but it is provided by the user in North America. Referred
to in some areas as a DSU.
numbered links
See
unnumbered links.
PAP
See
Password Authentication Protocol.
POTS
See
Plain Old Telephone Service.
Glossary.fm Page 3 Tuesday, October 10, 2000 3:32 PM