Lucent Technologies PortMaster - Manual (Page 279)

Accessing Shared Devices 18-3
Overview of Shared Device Access Methods
PortMaster port for configuration purposes. In this application, each port is identified by
a unique port number assigned during the configuration process. You can also configure
a pool of ports at a single TCP port number.
The netdata (TCP clear channel) device service is most often used when you want to
have a custom application open a TCP connection to an RS-232 device, or to connect
two serial devices across a network.
Figure 18-2 Network Device Configuration
The example described in this chapter allows a user to dial in to port S2 on the
PortMaster, log in to a workstation, and access a serial printer attached to port S9 as
/dev/ttyre, using the PortMaster device service. The workstation user can also access
port S2 as /dev/ttyrf when it is not being used for login service.
The modem attached to port S2 is connected with a straight-through cable and uses
hardware flow control and carrier detect. The DTE rate between the modem and the
PortMaster is locked.
To use the PortMaster login or device service, the workstation user must install the
PortMaster daemon in.pmd in the /usr/etc directory. She must also modify the
/etc/services and /etc/inetd.conf files to tell the workstation where to find in.pmd.
She must also add /dev/ttyrf to the /etc/remote file and /dev/ttyre to the
/etc/printcap file.
PortMaster
11820003
modems
host: /dev/network
user 1
user 2
Telnet/rlogin/netdata