Contents:
- Page 1
Setting up a
Connection to a Modem
- Page
2
Setting up a Connection to a Modem
- Configuring a
PPP Port for a Modem using a Login Account
- Configuring a
SLIP Port for a Modem using a Modem Dialer
- Configuring a
PPP Port for a Modem using a Modem Dialer
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Setting
up a Connection to a Modem
This section describes how to setup a network
modem, initialise a modem by a port initialisation string, set the default
PPP mtu_size, configure Telnet listener, SLIP, and PPP ports for a modem.
The information in this section is intended
for system administrators with access to priviledged commands, and assumes
a knowledge of the TCP/IP protocol and UNIX system administration.
Configuring
a Network Modem
This section describes how to configure a Modem
that is accessed via a network port on the Communications Server (i.e..,
for use with svr_tty).
Using Web Configuration.
Invoke the Server's setup utility by entering its IP address in a network-connected
web-browser, (i.e. http://123.456.789.001). When the Setup front
page is displayed:
Step 1.
Press the 'Setup' button. Specify a valid user name and password,
if prompted.
Step 2.
Select the 'Modem' hyperlink from the main Setup screen.
Step 3.
Select 'Network Modem' from Setup Modems screen.
Step 4.
Specify the following:
- Ports to which printer(s) are to
be connected- Port 01 to 08 or 16.
- Modem Initialisation Script Enabled
- on or off (default is off)
- Modem Initialisation Script - normally
begins with 'at'.
- Baud Rate - from 5 to 230,400 or
autobaud (default 115200).
- Character size - 8 or 7 (default
8).
- Parity - none, even, odd, mark or
space (default none)
- Stop bits - 1 or 2 (default 1)
- Flow Control - none, hardware or
software (default hardware)
Step 5.
Press the Configure button when ready. The input parameters are implemented
immediately. The setup program now confirms that the input has been
accepted by displaying the Configuration Results screen.
Initialise
a Modem by a Port Initialisation String
A port initialisation command can be used to
initialise a modem at boot time. The command syntax is:
SET/DEFINE/CHANGE
PORT INITIALIZATION SCRIPT script
where script is the initialisation string.
Note that the initialisation string may also be defined when configuring
ports using a web browser.
Configuring
a Telnet Listener Port for a Modem
To make devices attached to Communications Server
ports available to users on the network, configure Telnet listeners
and associate them with communications server ports. You can configure
up to 32 Telnet listeners.
When configuring a Telnet listener for a modem,
the port you are configuring must not be in use. You can't be logged
in to the port you want to configure, and it can't be in use by any
other user or service.
In the example below, Telnet listener 2003 is
added to the permanent database and associated with port 3 on the communications
server. It is identified as a modem and enabled for connections.
Local
1>> CHANGE TELNET LISTENER 2003 PORTS 3 ENABLED
Local
1>> CHANGE TELNET LISTENER 2003 IDENTIFICATION
`MODEM 987-6543'
Local
1>> CHANGE TELNET LISTENER 2003 CONNECTIONS
ENABLED
Local
1>> CHANGE PORT 3 ACCESS REMOTE
Telnet listener 2003 is now ready to accept
connections for modem service. A few parameters must be set, however,
before the port can handle modem connections. The sample configuration
below shows how to configure port 3 for dial-out modem access.
Local
1>> CHANGE PORT 3 MODEM CONTROL ENABLED
Local 1>> CHANGE PORT
3 SPEED 9600
Now a user can access the modem via Telnet from
a remote host by giving the name or Internet address of the communications
server and the TCP port number of the Telnet listener. For example,
to access a communications server named termserv on Telnet listener
2003, from the remote host type:
%
telnet termserv 2003
Configuring
for Dialin Login
Using Web
Configuration.
Invoke the Server's setup utility by entering its IP address in a network-connected
web-browser, (i.e. http://123.456.789.001). When the Setup front
page is displayed:
Step 1.
Press the 'Setup' button. Specify a valid user name and password,
if prompted.
Step 2.
Select the 'Modem' hyperlink from the main Setup screen.
Step 3.
Select 'Dialin PPP' from Setup Modems screen.
Step 4.
Specify the following:
- Ports to which terminal(s) are to
be connected - Port 01 to 08 or 16.
- Telnet or Rlogin - (default is telnet)
automatically either telnet or rlogin to the specified host
or IP address.
- Modem Initialisation Script Enabled
- on or off (default is off)
- Modem Initialisation Script - normally
begins with 'at'.
- Baud Rate - from 5 to 230,400 or
autobaud (default 9600).
- Character size - 8 or 7 (default
8).
- Parity - none, even, odd, mark or
space (default none)
- Stop bits - 1 or 2 (default 1)
- Flow Control - none, hardware or
software (default software)
Step 5.
Press the Configure button when ready. The input parameters are implemented
immediately. The setup program now confirms that the input has been
accepted by displaying the Configuration Results screen.
Configuring
a SLIP Port for a Modem Using a Login Account
You can start SLIP from a remote host by using a login account on the
Communications Server.
When configuring a SLIP port, the port you are configuring must not
be in use. You can't be logged in to the port you want to configure,
and it can't be in use by any other user or service.
To create a login account on the Communications
Server:
Step 1.
In privileged mode on the communications server, type:
Local
1>> CHANGE ACCOUNT username PASSWORD 'password'
Local 1>> CHANGE ACCOUNT
username PROTOCOL SLIP
Local 1>> CHANGE ACCOUNT
username HOST ADDRESS host_IP_addr
Local 1>> CHANGE ACCOUNT
username LOCAL ADDRESS local_IP_addr
Local 1>> CHANGE PORT
port_number LOGIN ACCOUNT ENABLED MODEM CONTROL
ENABLED
Local 1>> LOGOUT PORT
port_number
Where
- username is the name you want to
give the login account.
- password is the password you want
to use for the login account.
- host_IP_addr is the Internet address
of the remote host.
- local_IP_addr is the Internet address
of the port on the communications server.
- port_number is the number of the
port to which the modem is attached.
The following example shows how to create
a login account named termserv_SLIP with the password netbox on port
7. In this example, the remote host's Internet address is 89.0.0.2
and the communication server's port Internet address is 89.0.0.1,
and the protocol is set to SLIP.
Local
1>> CHANGE ACCOUNT termserv_SLIP PASSWORD 'netbox'
Local 1>> CHANGE ACCOUNT
termserv_SLIP PROTOCOL SLIP
Local 1>> CHANGE ACCOUNT
termserv_SLIP HOST ADDRESS 89.0.0.2
Local 1>> CHANGE ACCOUNT
termserv_SLIP LOCAL ADDRESS 89.0.0.1
Local 1>> CHANGE PORT
7 LOGIN ACCOUNT ENABLED MODEM CONTROL ENABLED
Local 1>> LOGOUT PORT
7
At this point, the communication server port
and the account are ready to use.
Step 2.
The user on the remote SLIP host must use a terminal emulator to dial
the modem and log in to the communication server using the login account
created in step 1. Once the user is logged in using the termserv_PPP
account, PPP is activated on the server's port.
Step 3.
The user on the remote SLIP host must exit the terminal emulator and
activate SLIP on the remote host. For instructions about how to activate
SLIP, refer to the operating system documentation.
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