User Manual

Modem Sharing Sharing Modems
10-3
◆ Form a TCP connection directly to an SCS serial port.
◆ Log into the SCS and connect to a local service or port.
These methods are discussed in the following sections.
10.2.1 Configuring an IP Modem Pool Service
Creating a service allows you to set up a modem pool on several SCS ports. To create an IP modem pool
service, enter the Set/Define Service Ports command.
Figure 10-7: Creating an IP Modem Pool Service
Note: The complete syntax of Set/Define Service Ports is described on page 12-111.
10.2.2 Using the COM Port Redirector
To use the Redirector on an IP network, you must create a modem pool service that is associated with a TCP
listener socket. Refer to Figure 10-8 for the necessary command.
10.2.3 Connecting to a TCP Listener Service
Each service may be associated with a TCP listener socket. TCP connections to the socket are connected to
the service. Once a connection is established, a user may issue commands to the modem.
To associate a service with TCP listener socket, use the Set/Define Service TCPport command. Socket
numbers must be between 4000 and 4999.
Figure 10-8: Specifying a Raw TCP Listener Socket
Note: The complete syntax of Set/Define Service TCPport is listed on page 12-113.
If the socket should perform Telnet IAC character-escaping negotiations on the data stream, use the Set/
Define Service Telnetport command.
Figure 10-9: Specifying a Telnet TCP Listener Socket
Note: Set/Define Service Telnetport is discussed in detail on page 12-113.
Connecting to a TCP listener service is recommended if more than one modem is being used. The SCS will
automatically connect the user to the next available modem, avoiding the trail and error process of finding
an available port (see Connecting to a Serial Port on page 10-4).
Local>> DEFINE SERVICE modempool PORT 8-10 TCPPORT 4008
Local>> DEFINE SERVICE fastmodems TCPPORT 4999
Local>> DEFINE SERVICE slowmodems TELNETPORT 4500