A T1-based DSP modem for interfacing voice and packet networks

Author

White, Hugh E.

Author_Institution

SRI Int., Princeton, NJ, USA

fYear

1988

Firstpage

374

Lastpage

378

Abstract

A packet-switched data network (PSDN) with dial-in or dial-out capability requires a large number of interfaces to the public switched telephone network (PSTN). A T1 trunk connected to an X.25 trunk by a multiple digital signal processing modem is proposed for this interface in place of individual telephone lines, modems and computer cables. The design and performance for this type of modem, meeting the 212A standard, is presented. A simple hardware design using an EPROM DSP chip is described to illustrate the compact implementation possible for such a circuit-switched/packet-switched network interface

Keywords

data communication systems; modems; packet switching; signal processing equipment; telephone networks; T1 trunk; X.25 trunk; circuit-switched/packet-switched network interface; multiple digital signal processing modem; packet-switched data network; public switched telephone network; telephone/data network interface; voice/data network interface; Cables; Circuits; Computer interfaces; Digital signal processing; Digital signal processing chips; EPROM; Hardware; Modems; Packet switching; Telephony;

fLanguage

English

Publisher

ieee

Conference_Titel

Computers and Communications, 1988. Conference Proceedings., Seventh Annual International Phoenix Conference on

Conference_Location

Scottsdale, AZ

Print_ISBN

0-8186-0830-7

Type

conf

DOI

10.1109/PCCC.1988.10102

Filename

10102