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data port
A high-speed data port located on the T1 and E1 Voice Modules. Each port is
available for transfer of video, X.25, external router, or any customer premise
equipment synchronously clocked in multiples of 56/64 kb/s.
DCE
Data Communications Equipment. In industry usage, the equipment at the
network side of a subscriber link that provides both interface control and the
means of digital transmission between user premises and the network
switches.
DDS
Digital Data Service. A data communications network comprising
interconnecting digital transmission facilities, a private line digital service.
default gateway
The default gateway is used to connect to destinations in other networks if no
other route is known or provided. A gateway maps at all seven layers of the
OSI model.
default reset
In a default reset, the Passport 4400 re-initializes the configuration memory
banks with factory-default settings. Therefore, all user-defined configuration
values are lost.
DEM
Data Expansion Module. Data modules for the Passport 4400. The
High-speed Data Module (HDM) provides additional port capability, while
the Legacy Data Module (LDM) provides legacy protocol for branch sites
connected to a Passport only network.
DLCI
Data Link Connection Identifier. Ten bits within the two address octets of a
Frame Relay address header which carry information used to locally identify
the virtual circuits or permanent virtual circuits.
DNA
Device Network Address. An identifier given to applications in many data
networks. This address is used as the fundamental identifier for setting up a
Using Passport 4400 Install Tool Version 4.2
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Table of Contents
Troubleshooting
