LINKUP 5294 WITH DL5294 FIRMWARE
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6.4 Connecting Remote Terminals
For remote terminals, full-duplex asynchronous modems are required. The modems attached to the
LinkUp 5294 ports should be configured properly for switched or dedicated lines.
6.4.1 L
INE
C
ONFIGURATION
Modems on the LinkUp 5294 end of switched lines should permit the following:
• Auto-answer mode.
• Loss-of-Carrier disconnect (causes modem to drop DSR and return to auto-answer state if phone line
becomes disconnected).
• External DTR control (causes modem to disconnect from phone line if the LinkUp 5294 drops
DTR).
6.4.2 M
ODEM
C
ONSIDERATIONS
Auto-answer modems must be optioned to pass Ring Indicator (Pin 22) to the LinkUp 5294 and for DTE
control of DTR (Pin 20). In auto-answer mode, the LinkUp 5294 raises DTR in response to a positive
going signal on Ring Indicator. The Ring Indicator signal must be set to be held low or negative except
when ringing occurs. See the literature provided with the modem.
User-friendly messages which are generated by some modems (such as Connect) must be disabled. Such
messages will interfere with the LinkUp 5294 autobaud detection, causing error during connection.
Connect the modem to the switched or dedicated communication line as appropriate. Connect the
modem to an asynchronous port on the LinkUp 5294 using an RS-232C cable. (The LinkUp 5294 port
must be configured for DTE operation.)
Connect the terminal to the other modem with an RS-232C cable. Then connect the modem to an
appropriate communications line.
6.5 Connecting Printers
Printers may be connected to the LinkUp 5294 in one of two ways. Printers which use a serial interface
(RS-232C cable) may be connected directly to the LinkUp 5294 using one of the asynchronous ports.
The attachment may be either local, using only a cable, or remote, using a pair of modems. An
alternative is to attach the printer through the auxiliary port of a terminal which is in turn attached to
the LinkUp 5294. Special considerations for installation of printers are discussed in the following
paragraphs.
6.5.1 L
OCAL
P
RINTERS
The following information applies if a directly attached printer is used:
• The port to be used must be configured with no overridable parameters, since the printer cannot be
used to answer Connect Mode prompts.
• Configure the LU associated with the port as a PRT (printer) LU.
• Connect the printer to one of the async ports on the rear of the LinkUp 5294. Make sure that the
port interface parameters agree. The autobaud option cannot be used for printers.
Once the printer is turned on and put on line, it should be recognized by the LinkUp 5294. If the host
is properly configured, there is no further action required.