Nortel BCM 3.7, Руководство пользователя, Страница: 898 / 1004

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DASS2
Digital Access Signaling System Number 2 (DASS2) is a UK proprietary standard for
signaling on ISDN connections between customer premises and the public network.
DASS2 is used between the customer equipment and ISDN local exchange and is suitable
for multiple access.
Data link connection identifier
See DLCI.
DDI Mux
The Digital Drop and Insert Mux media bay module is a specialized two-level module
allows you to choose which channels on a T1 line you want to dedicate to data
transmissions and which channels you want to dedicate to telephony operations. Both
lines are programmed under
Services, Telephony Services, Lines .
default
Default settings are the settings automatically programmed into the programming when
you first install the system. You change the settings from their defaults using the Unified
Manager. Defaults are determined by which region and which telephony template you
choose when you first install your system. (Quick Start Wizard)
Delayed ring transfer
See DRT.
destination code
A destination code is an assigned number with up to 12-digits that the user dials before the
outgoing call string. The system reads and translates the code into routing and dial-out
information. This code must not conflict with any other access code on the system. Assign
destination codes in Destination Codes. (Services, Telephony Services, Call Routing)
DHCP
The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows network
administrators to centrally manage and automate the assignment of IP addresses in an
network. When an organization sets up its computer users with a connection to the
internet, internet protocols (TCP/IP) demands that an IP address must be assigned to each
machine as well as to any device connected to the network.
Without DHCP, the IP address must be entered manually at each computer and, if
computers move to another location in another part of the network, a new IP address must
be entered. DHCP allows the network administrator to supervise and distribute IP
addresses from a central point. It also automatically sends a new IP address when a
computer is plugged into a different place in the network.
dial-up connection
A dial-up connection is a temporary connection between computers that is established
over an analog or digital telephone line.