AT&T 7300 series, 7500 series, 7100 series, 2500 series manual Image Processing, FAX Transmittal

DATA COMMUNICATIONS CONFIGURATIONS 9-7

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ACCUNET

MPDM*

ACCUNET

MPDM*

PICTURETEL

SYSTEM 75/ SYSTEM 85/ GENERIC 1/

GENERIC 2

DS1	SWITCHED
	DIGITAL
	NETWORK

DS1

SYSTEM 75/

SYSTEM 85/

GENERIC 1/

GENERIC 2

ACCUNET	ACCUNET
MPDM*	MPDM*

PICTURETEL

*Also called MPDM/M1*.

Figure 9-4.A Possible Teleconferencing Configuration

Image Processing

CAD/CAE and medical imaging applications may require the transmittal of an image cross-country. These applications can use either public, switched (ACCUNET Switched Digital Service or Software-Defined Digital Network) or private, nonswitched (ACCUNET T1.5 or ACCUNET Spectrum) facilities for image transmission from site to site. Figure 9-5shows a typical configuration.

FAX Transmittal

Group 3 facsimile is used for stand-alone and person-to-person communication; while Group 4 — whose applications include electronic mail, optical character recognition, and document transmittal and storage — is better suited for computer-controlled network communication. Group 3 FAX is typically sent over the public voice network and provides analog transmission at speed up to 9.6 kbps; while Group 4 demands 64-kbps ISDN-PRI facilities. The ACCUNET Switched Digital Service or the Software-Defined Digital Network can provide Group 4 FAX transmittals through their SW64 service. The ACCUNET Packet Service can be used for these transmittals if a packet assembler/disassembler in inserted in the communications stream immediately before and after the transmissions are processed through the network. Private, nonswitched ACCUNET T1.5 or ACCUNET Spectrum facilities can also be used.