Paradyne Switch 6800 User Manual download pdf (Page 12)

1Introduction

1-36800-A2-GB31-20 January 1997

DATAPHONE II Direct Distance Dialing (DDD) Modems

These modems are capable of full-duplex synchronous or asynchronous data transmission

over the switched telecommunications network at speeds up to 9.6 kbps. The DDD

modems collocated with the 6800 Series NMS have a control channel interface that

allows monitoring by the 6800 Series NMS.

These modems interface with the 6800 Series NMS through the Shared Diagnostic Units

(SDUs). Each SDU oversees up to eight switched network modems and are fully

addressable by NMS.

NMS-Supported Data Service Units (DSUs)

NMS supports the following DSU products:

DATAPHONE II 2600 and 2700 DSUs

These DSUs are designed for multipoint and point-to-point applications. The 2600 Series

DSUs provide digital, full-duplex network data transmission over the DATAPHONE

Digital Service (DDS) and the ACCUNET Switched 56 Service and do not have

diagnostic capabilities. The 2700 Series DSUs, with a secondary channel capability,

provide digital, full-duplex synchronous data transmission over DDS facilities plus full,

nondisruptive diagnostic capabilities.

COMSPHERE 3600 Series Data Service Units (DSUs)

These DSUs are capable of multispeed operations on the DATAPHONE Digital Service

network or equivalent Digital Data Services network, and can operate as local area

datasets (limited-distance modems). An optional integrated V.32 dial backup module

(DBM) enables backup through the public switched telephone network in case of failure

of the digital connection. DSU interface to the 6800 Series NMS can be via either control

channel connection when directly connected to the 6800 Series NMS, or via diagnostic

channel connection when remotely connected to the 6800 Series NMS.

Paradyne APL Modems and DSUs (via ANALYSIS Gateway)

These modems consist of the MPX, LSI24, and the 3400 Series high-speed DMC protocol APL

modems. These modems perform at speeds ranging from 1.2 kbps to 19.2 kbps. These speeds are

accomplished by using a variety of CCITT Paradyne proprietary and Forward Error Correcting

(FEC) modulation schemes as appropriate for the specific model chosen. The modems can be

controlled by NMS using the cut-through feature and ANALYSIS Gateway, by ANALYSIS NMS,

or independently through the modem’s Diagnostic Control Panel (DCP). The DCP allows the

operator of a modem which is optioned as a control to configure, monitor, and test both the control

and tributary modems in the network.

Naming Conventions

NMS naming conventions enable you to assign a name to a device and to assign a network or

circuit name to a group of logically related devices, such as those devices sharing a common

customer, location, or application. You can then reference or test a group of devices, a network, or

a circuit by entering a single name. Refer to Appendix E of the COMSPHERE 6800 Series

Network Management System User’s/System Administrator’s Guide for a description of the device

naming method accepted by NMS.

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Paradyne Switch 6800 User Manual Page 12