Lucent Technologies DEFINITY Enterprise Communications Server, System 75, System 85 Instructions Manual

DEFINITY Enterprise Communications Server and System 75 and System 85
Terminals and Adjuncts Reference
555-015-201Issue 11
December 1999
Data Modules
21-45 The 703A Data Service Unit (DSU)
21
The 703A Data Service Unit (DSU)
Figure 21-14. The 703A Data Service Unit
The 703A DSU is used with the 7406D voice terminal to provide asynchronous
data communications through the switch. The DSU replaces the desk stand under
the 7406D voice terminal and allows a data terminal (such as a 610 BCT) to be
connected to...

DEFINITY Enterprise Communications Server and System 75 and System 85
Terminals and Adjuncts Reference
555-015-201Issue 11
December 1999
Data Modules
21-46 The 703A Data Service Unit (DSU)
21
Figure 21-15. A Block Diagram of 703A Data Service Unit Interfaces
Applications
The 703A DSU can be used with 7406D voice terminal connected to the
DEFINITY Communications System Generic 1, Generic 2, Generic 3, the
DEFINITY ECS, System 75, or System 85. Typical applications are users with
data terminals requiring a...

DEFINITY Enterprise Communications Server and System 75 and System 85
Terminals and Adjuncts Reference
555-015-201Issue 11
December 1999
Data Modules
21-47 The 703A Data Service Unit (DSU)
21
Other Physical Features
Jacks
The DSU contains four jacks. The handset cord jack is on the bottom of the DSU
housing just under the left side of the housing. The mounting cord jack and the
audio cord jack are on the bottom of the DSU housing just under the rear of the
housing. The RS-232-C connector is on the rear...

DEFINITY Enterprise Communications Server and System 75 and System 85
Terminals and Adjuncts Reference
555-015-201Issue 11
December 1999
Data Modules
21-48 The 703A Data Service Unit (DSU)
21
Power
The 703A DSU requires an external power source. Refer to theAdjunct Power
section earlier in this manual for the correct power source.
703 DSU PECs
The 703A DSU can be ordered using the following PEC:
n703A Data Stand — 31824A
Additional Documents
The following documents contain additional information relating...

DEFINITY Enterprise Communications Server and System 75 and System 85
Terminals and Adjuncts Reference
555-015-201Issue 11
December 1999
Data Modules
21-49 The DEFINITY High Speed Link
21
The DEFINITY High Speed Link
Figure 21-16. The DEFINITY High Speed Link
The DEFINITY HSL is a data service unit that allows data equipment to access
the data services of System 75 and System 85 and the DEFINITY switch. It is
used where the integration of voice and data is not required. The HSL suppor ts
synchronous data...

DEFINITY Enterprise Communications Server and System 75 and System 85
Terminals and Adjuncts Reference
555-015-201Issue 11
December 1999
Data Modules
21-50 The DEFINITY High Speed Link
21
Physical Description
Dimensions
NOTE:
The following dimensions are approximate.
Width = 7 inches
Depth (front and rear) = 9-1/4 inches
Height = 1-3/4 inches
Weight = 1 pound 5 ounces
Features
Lights
The DEFINITY HSL is equipped with the following lights:
nPOWER/TEST light — This red light goes on steadily when there is...

DEFINITY Enterprise Communications Server and System 75 and System 85
Terminals and Adjuncts Reference
555-015-201Issue 11
December 1999
Data Modules
21-51 The DEFINITY High Speed Link
21
Tests
The DEFINITY HSL suppor ts the following tests and maintenance features:
nSelf-test
nLocal loopback
nData loopback
nRemote loopback (V.54 and AT&T proprietar y protocol)
nRemote loopback with self-test
nDCP looparound test
nDDS latching/non-latching loopback
Connectors
The following connectors are located on the...

DEFINITY Enterprise Communications Server and System 75 and System 85
Terminals and Adjuncts Reference
555-015-201Issue 11
December 1999
Data Modules
21-52 The DEFINITY High Speed Link
21
nRS-366 ACU interface for originating data calls
nRS-232 AT command interface with autobaud for originating and
disconnecting calls
nTest features for system fault isolation
nNon-volatile memory for storing an option profile and four telephone
numbers
nReset options for easy loading of default options
nData inversion...

DEFINITY Enterprise Communications Server and System 75 and System 85
Terminals and Adjuncts Reference
555-015-201Issue 11
December 1999
Data Modules
21-53 The DEFINITY High Speed Link
21
Switched Endpoints
The DTE must be capable of communicating at 56 kbps or 64 kbps. Proper
switched operation requires that the DTE supports a Data Terminal Ready (DTR)
lead on its V.35 interface. The DTR lead provides the signal to the HSL that it is
ready to receive or originate a call. Before the High Speed Link can...

DEFINITY Enterprise Communications Server and System 75 and System 85
Terminals and Adjuncts Reference
555-015-201Issue 11
December 1999
Data Modules
21-54 The DEFINITY High Speed Link
21
Permanent (Private Line) Requirements
The following sections describe Permanent (Private Line) requirements.
Releases for Permanent Applications
Permanent applications require the switch to establish and maintain the
connection. The switch release and corresponding feature that suppor t
permanent connections are:...