AT&T DEFINITY 7200 series Guía de usuario descargar pdf (Pagina 191)

9. DATA COMMUNICATIONS CONFIGURATIONS

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Chapter 8 described how DTEs and LANs can communicate through your communications system. In

addition, it told you how your communications system could communicate over greater distances using any

of the ACCUNET data services. This chapter integrates chapter 7 and 8 information by showing you how

you can conﬁgure your networks to:

• Use the dedicated switched connection (DSC) and permanent switched connection (PSC) capabilities

of your communications system.

• Link SNA nodes through your communications system.

• Connect your local communications systems over public or private data networks for ﬁle transfers,

video teleconferencing, image processing, and FAX transmittal.

Note that the illustrations shown in this chapter depict only some of the many possible conﬁgurations

appropriate for a particular application. The conﬁguration you install will depend upon the actual DTEs

and DCEs you use in the connection. When conﬁguring a connection, remember to refer to table 1-7 and

tables 8-1 through 8-3 to determine the type of DCE that is appropriate. Other general rules that may help

you in your DCE decision are:

• When you send 56-kbps, robbed-bit data over a switched digital network, use the MPDM with the

ACCUNET modiﬁcation kit. This MPDM is sometimes called the MPDM/M1* or the ACCUNET MPDM.

• In addition, if the destination DCE does not do a mode 2 handshake, you also should use the ACCUNET

MPDM (MPDM/M1*), regardless of whether you route the data through a switched digital network.

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AT&T DEFINITY 7200 series Guía de usuario Pagina 191