OKIDATA DOC-IT3000, Service Manual

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MB SIMM memory can be ordered as an option on the Doc-It 3000 or the Doc-It 4000
systems.
- Each of the memory expansion SIMM sockets (U52 or U53) can support one of the 72
pin, 32/36 bit wide, card edge type (PS/2) SIMMs. The memory is 32 bits wide. 36 bit wide
SIMMs can be supported, but the 4 parity bits will not be utilized in this
design. 256K x 32 bit, 512K x 32 bit, 1M x 32 bit or 2M x 32 bit SIMM
modules with 80ns (or faster) page mode memory parts can be
supported.
· FAX modem and DAA circuitry
- The FAX modem is a synchronous, 9600bps, half-duplex modem with error detection.
The modem supports group 3 (G3) facsimile transmission and reception. The modem
satisfies standards specified by CCITT V.29, V.27ter, V.21, T4 and the signaling
requirements of T.30. The modem can operate at 9600, 7200, 2400 and 300bps and
perform HDLC framing at all speeds. The modem operates over a public switched
telephone network (PSTN) through the Data Access Arrangement (DAA). The DAA
controls hook switch, sends out dial pulses and detects rings.
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business
Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)