Wiring Ports For Specific Devices; Dev=Host (Computer Or Other Devices) - Digi PortServer II User Manual

Wiring Ports for Specific Devices

The table below summarizes the characteristics of and wiring requirements for the
device types available on PortServer II.
Device DTR + RTS
Type when idle
term high
prn low
host low
low
hdial
hio low
min high
low
mout
mio high
Detailed explanations of these functions are given below.
Note: Device types (dev=xxx) are set with the set ports command, as described
in the Function Reference Guide. Procedures are also given in later chapters
of this User's Guide.

dev=host (Computer or other devices)

Use this device type for connecting another computer to a serial port. A typical use
might be connecting a bulletin board system (BBS) to the Ethernet through the
PortServer II. DCD and DTR must be cross-connected between the PortServer II and
the BBS server.
When the server raises DTR to signal that it can receive calls, the PortServer II sees
DCD go high. It then allows incoming connections from the Ethernet through the
serial connection to the server. When an incoming connection is requested, PortServer
II raises DTR, and the server sees DCD go high, indicating there is a call. (This
sequence mimics a modem answering a dial-up call.)
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data no
never yes
never if DCD
DCD + data no
DCD + data if DCD
DCD raises no
never yes
DCD raises yes
Installation
Remote Connect
allowed
Action when
DCD drops
ignore
ignore
hang up
hang up
hang up
hang up
hang up
hang up
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