ADTRAN Express L128FP User Manual page 147

Glossary
Name Binding Protocol (NBP)
The AppleTalk transport-level protocol that translates a character
string name into the internet address of the corresponding socket cli-
ent; NBP enables AppleTalk protocols to understand user-defined
zones and device names by providing and maintaining translation ta-
bles that map these names to corresponding socket addresses.
NAT
Network Address Translation occurs at the borders of stub domains.
Its purpose is to translate the IP address of passing packets by chang-
ing all references of one IP address to another. Translation is per-
formed as per RFC 1631.
netmask
A 32-bit bit mask which shows how an Internet address is to be divid-
ed into network, subnet, and host parts. The netmask has ones in the
bit positions in the 32-bit address which are to be used for the network
and subnet parts, and zeros for the host part. The mask should contain
at least the standard network portion (as determined by the address's
class), and the subnet field should be contiguous with the network
portion.
non-ISDN line
Any connection from a CPE to a SPCS that is not served by D-Channel
signalling.
non-ISDN trunk
Any trunk not served by either SS7 or D-Channel signalling.
NT1
Network Termination 1. A unit that provides physical and electro-
magnetic termination of the U-interface 2-wire transmission line, con-
verts between Layer 1 formats used at the U- and T- reference points,
and performs some maintenance functions.
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