ZETRON 640 DAPT XTRA, Руководство по установке и ремонту

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Communications Setup
025-9416 37
IBM-Compatible
Office Computer
PSTN
To Telephone
Trunk Cards
Model 640
To Internal
or external
modem
RJ-11
phone
line
Figure 13. Modem Connection to the Model 640
To setup the system for modem connection, follow the steps below:
q
1. Determine which trunk of the Model 640 to use for modem maintenance.
q 2. Connect the office PC modem to a standard telco line using RJ-11 cable. If the PC
modem is external, connect the modem to the computer’s serial COM port using RS-
232 cable (usually standard 25-pin male connectors on both ends).
Note: Make sure to use the modem jacks labeled “LINE” or “TELCO” if an external PC
modem is installed. Do not connect to the “PHONE” or “LOCAL” jacks, as they are
for telephone sets only.
q 3. Connect the desired Model 640 trunk to an end-to-end, loop start telco line. Use the
50-pin trunk and radio station interface for connections.
ESTABLISHING ZLINK COMMUNICATIONS
A communications link must be established once the physical connections have been completed
between the Model 640 and the office computer, console, or dumb terminal. Follow one of the
procedures below to initiate a ZLINK connection.
Note: This subsection gives only an overview of how to setup MCU for test purposes. Refer
to the Model 640 Operating and Programming Manual (Part No. 025-9417) for
details on the software operation of the paging terminal.
ZLINK Connection Through MCU
This procedure describes how to establish communications with the Model 640 using MCU.
Recall that MCU can only be run on an IBM-compatible office computer. If the ZLINK connec-
tion is made with a dumb terminal only, skip this subsection.
Follow the steps below to configure MCU for ZLINK communications.