COMSPHERE 3550 Series Data Service Units
session disruptive | Application data may be disrupted when running a test, or running the test may |
| cause the application session to be dropped or terminated. The result depends upon |
| the |
Diagnostic messages with a duration of .5 seconds or less that are sent over the | |
diagnostics | primary data channel. These messages may interrupt customer data, causing errors |
| requiring retransmission of data blocks. They should not, however, cause |
| termination of the communication session. |
Shared Diagnostic | A feature that allows |
Control Panel | Installed on one COMSPHERE 3000 Series Carrier, it controls and monitors the |
(SDCP) | DSUs in all the carriers in the cabinet. A single SDCP can control up to eight |
| carriers, with a total of 128 DSUs and, if present, 128 DBMs. |
Shared Diagnostic Unit | A circuit card that plugs into a dedicated slot (slot 0) in the COMSPHERE 3000 |
(SDU) | Series Carrier to provide the shared diagnostic control panel (SDCP) and network |
| management interfaces to the DSUs in the carrier. It translates the network |
| management protocol to the devices in the carrier and routes incoming messages to |
| the appropriate slots. |
standalone | The Model 3550 DSU which is designed for desktop operation. A standalone DSU |
| can be configured as either a control or a tributary. |
Time Division Multiplexer | A circuit card that supports time division multiplexing on two ports, and which can |
(TDM/Flex) | also increase |
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, or other purpose. |
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 | The state of the Transmitted Data lead. |
UL | Underwriters Laboratories, Inc. |
USOC | Universal Service Ordering Codes. |
6700 Series Network | A Paradyne automated network management system that allows an operator to |
Management System | monitor network conditions, analyze problems, and take restorative measures from |
(NMS) | a single personal computer (PC) workstation. This NMS operates in a Microsoftr |
| Windowst graphic environment. |
December 1996 |
