Instruction manual

DEFINITY® Business Communications System and GuestWorks® Issue 6
Overview
555-231-208
Issue 1
April 2000
Data Management Solutions
8-3Digital interfaces
8
■ Data Hot Line enables you to administer a data module so that when the
module goes off-hook the data call is immediately placed to the
preassigned number. This feature may also be used to restrict a data
module to the assigned number only.
■ Data Protection prevents disruption of data transmissions by the system’s
other features or tones. Both the originating and terminating ends of the
call are protected.
■ Data Communications Access allows you to communicate with a computer
via analog trunks.
■ Host-Computer Access allows data endpoints with data modules to access
a computer directly.
Digital interfaces
The system offers powerful digital interfaces for voice, data, and integrated
voice/data transmission. Digital Communications Protocol, a key part of the
system’s digital architecture, provides integrated voice and data communications
between terminals and the system.
The system supports a wide variety of bit-oriented signaling formats on Digital
Signal Level 1 (1.544 Mbps) facilities, compatible with local CO services, nodal
network services (such as AT&T MEGACOM
*
services), and services conforming
to European Conference of Postal and Telecommunications standards in the inter-
national marketplace.
The system also implements both standard ISDN interfaces: ISDN Consultative
Committee for International Telephone and Telegraph Primary Rate Interface and
Basic Rate Interface. With both interfaces, the system delivers the advantages of
full end-to-end ISDN connectivity to every desktop.
Digital Communications Protocol
Digital Communications Protocol (DCP), similar to ISDN-Basic Rate Interface, has
been the architectural foundation for both of Lucent Technologies’ digital systems
and has for many years provided advanced ISDN-like functions to Lucent
Technologies systems by integrating voice and high-speed data. DCP continues
to serve as a key digital interface for the system.
Like ISDN-Basic Rate Interface, DCP defines the communications interface
between a terminal and the system. It consists of two 64 kbps information (or
bearer) channels and a separate 8 kbps channel (referred to as a data channel)
for signaling and control information. Out-of-band signaling via the data channel
allows the information channels to be used for clear-channel transmission.
* Registered trademark of AT&T.