COMSPHERE 3600 Series Data Service Units
Glossary-8
July 1999
3610-A2-GB91-90
synchronous transmission
Data transmission that is synchronized by timing signals. Characters are sent at a
fixed rate. This type of transmission is more efficient than asynchronous
transmission.
System Controller (SC)
An AT&T NMS that uses the DATAPHONE II (DPII) protocol.
Systems Network
Architecture
(SNA)
A description of the logical structure, formats, protocols, and operation sequences
that transmit information and control the configuration and operation of an IBM
network.
Time Division Multiplexer
(TDM)
A circuit card that supports time division multiplexing and digital sharing for up to
six ports, and can serve as a digital bridge for multipoint dial backup and multipoint
LADS operation, or can increase digital-sharing capability.
training
The process of negotiating a communication rate between V.32 modems during call
setup.
transmitter
A circuit capable of generating, modulating, and sending a signal for
communication, control, and other purposes.
tributary
A DSU or modem that is, for diagnostic purposes, at a logically subsidiary level in
a hierarchical network. Tributary DSUs in a network receive data from the control
DSU, as well as from any network management system present in the network.
TXD
State of the EIA Transmitted Data lead (V.24 circuit 103).
UL
Underwriters Laboratories, Inc.
USOC
Universal Service Ordering Codes.
Virtual Telecommunications
Access Method (VTAM)
An IBM program product that controls communication and the flow of data in an
SNA network.
winkback detection
In telephone switching systems, a momentary signal state change from control
mode idle (CMI) to data mode idle (DMI), and back to CMI (sometimes referred to
as a “wink start’’).
6-port connector module
A module that is installed on the COMSPHERE 3000 Series Carrier that contains
six 25-pin EIA-232-D DTE connectors. In addition, a 26-pin high-density
connector is located at the top of the connector module to provide the V.35 interface
for either Port 1 or an aggregate data path. (This connector requires a 6-port V.35
interconnect cable to convert the 26-pin high-density interface to the standard V.35
34-pin interface.) The module is used with a modular DSU-TDM or DSU-MCMP
and allows the removal of the modular circuit cards from the front of the carrier
without first disconnecting the DTE cables at the rear of the carrier.
6700 Series Network
Management System
(NMS)
A Paradyne automated network management system that allows an operator to
monitor network conditions, analyze problems, and take restorative measures from
a single personal computer (PC) workstation. This NMS operates in a Microsoft
r
Windows
t
graphic environment.
6800 Series Network
Management System
(NMS)
A Paradyne automated network management system that allows an operator to
monitor network conditions, analyze problems, and take restorative measures.
Summary of Contents for COMSPHERE 3610
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Page 259: ...Pin Assignments F 11 3610 A2 GB91 90 July 1999 Figure F 8 EIA 232 D Crossover Cable 4951 035F ...
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