Cisco 761M Installation Manual page 76

Definition of Terms and Acronyms
Directory numbers
The equivalent of telephone numbers. This is the number the router dials to connect to
a remote router. ISDN BRI lines are generally assigned two local directory numbers,
one for each B channel.
EPOS
Electronic Point of Sale
IE
Information Element of a Q.931 message
Integrated Services Digital Network (ISDN) Basic Rate Interface (BRI)
A digital communication medium that operates over existing analog telephone lines.
The BRI provides two 64-kbps B channels (for voice and data) and one 16-kbps D
channel (for customer and call information). This channel combination is sometimes
denoted as 2B+D.
Internet Protocol (IP) address
A network address that uniquely identifies a device on an IP network. This type of
address consists of 4 bytes, represented as decimal values, separated by periods, as in
123.45.67.89.
Media Access Control (MAC) address
Also known as a hardware address. This address is assigned by the device manufacturer,
for example, 1234.5678.9000.
Point-to-Point Protocol (PPP)
A direct connection between two nodes; a connection without any intervening nodes or
switches. In an internetwork, the term refers to a direct connection between two
networks.
Password Authentication Protocol (PAP)
A form of PPP authentication that requires an exchange of user names and clear-text
passwords between two devices. PAP passwords are sent unencrypted. Both devices
must support PPP.
PAT
Port Address Translation
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Cisco 700 Series Router Installation Guide