Toshiba Strata AirLink DK40i, Installation And Maintenance Manual

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Peripheral Installation
PC/Data Communications Interface Units
Strata DK I&M 6/00
12-47
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The RPCI-DI and PDIU-DI operate like a DCE and connect directly to DTE devices using
standard RS-232 cables. Depending on how its internal jumper plugs are configured, the PDIU-DS
can either operate like a DTE and connect to DCE devices; or operate like a DCE device and
connect to DTE devices. In most applications, DTE and DCE devices exchange data between each
other via the standard RS-232 cable connection.
When in the data communications modes, RPCIs and DIUs can function with DCE and DTE
devices at data speeds of up to 19.2 kbps. However, keyboard dialing using AT commands (from a
PC or terminal connected to a RPCI or DIU) is limited to 9600 bps. RPCI or DIU data
transmission speed is set by the first AT command that the RPCI or DIU receives once it is in the
command state; if manual dialing or receiving calls in the auto answer (default) mode, the
transmission speed is transparent and can be up to 19.2 kbps.
Important!
To use the RPCI-DI, PDIU-DI or PDIU-DS with AT commands, communications
software or a PC program that performs terminal emulation must be used. AT
commands cannot be issued from the computer’s operating system prompt.
RPCI-DI Dual Mode
RPCI-DI can operate in the data communication or Telephone Application Program Interface
(TAPI) mode.
♦ When in the Data Command mode, send the HEX (fØ), enter ALT (Hold) + 240 to the RPCI to
switch it to the Data Communications mode. (Unplugging the telephone cord and then
reconnecting it also resets the RPCI to the Data Communications mode.)
♦ When in the TAPI mode, send (ATCØ) to the RPCI to switch it to the Data Command mode.
In the TAPI mode, a constant stream of data is sent from the RPCI to the PC COM port.
♦ RPCI-DI mode switching should be performed automatically by the application programs
running on the PC connected to the RPCI-DI.
(See Chapter 15 – Computer Telephony Integration for instructions on configuring your PC for
TAPI software.)
Common DIU Connections
The block diagram in Figure 12-24 illustrates common RPCI and DIU data communications
connections. In this example, RPCI-DIs or PDIU-DIs are connected to PCs (PC1 and PC2), and
PDIU-DSs are connected to a serial printer and modems. PC users can transfer files internally,
print files on the same printer, and access the modem pool to send/receive data to/from an external
personal computer or dial up data service.
To access these devices, a data call connection must be established between the RPCIs and DIUs.
This is accomplished by dialing the destination DIU from a digital telephone dial pad or from a PC
keyboard using standard AT dial commands. RPCI-DIs and PDIU-DIs share the same intercom or
[PDN]/ports with the digital telephone to which they are connected, while PDIU-DSs have their
own. The intercom and data call LEDs on the digital telephone initiates a voice or data call,
respectively. When dialing from a keyboard with AT commands,
ATD
is typed for voice calls, and
ATDD
for data calls.
Installation instructions for these devices are provided, starting from “RPCI-DI, PDIU-DI, PDIU-
DS SW1 DIP Switch Information” on Page 12-59 through “PDIU-DS Disassembly and
Assembly” on Page 12-64 . Call paths and scenarios for five types of data test calls are provided in
“RPCI-DI/PDIU-DI/PDIU-DS Data Communication Installation Tests” on Page 12-65 , paragraph
2 through paragraph 6. Step-by-step data calling procedures are provided in the PC/Data Interface
User Guide
.