User guide
In This Chapter
Chapter 8 Modem Emulation 35
Chapter 8 Modem Emulation
In This Chapter
This chapter describes how to configure a Digi One TS and a PortServer TS 2/4 MEI for modem emulation. It
discusses the following topics:
Modem Emulation (Digi One TS and PortServer TS 2/4 MEI only) ............................................40
Common User Scenarios ...............................................................................................................41
Modem Emulation Cable Signals ..................................................................................................42
Configuring the Device Server for Modem Emulation: Web Interface.........................................42
Originating, Answering, and Disconnecting Calls ........................................................................43
Modem Emulation AT Command Set ...........................................................................................44
Modem Emulation (Digi One TS and PortServer TS 2/4 MEI only)
Modem emulation enables a system administrator to configure a networked Digi device server to act as a
modem. The Digi device server emulates modem responses to a serial device and seamlessly sends and receives
data over an Ethernet network instead of a PSTN (Public Switched Telephone Network). The advantage for a
user is the ability to retain legacy software applications without modification and use a less expensive Ethernet
network in place of public telephone lines.
To use a Digi device server for modem emulation, do the following:
• use a cable with the correct wiring pinouts (see See “Modem Emulation Cable Signals” on page 37.)
• configure the serial ports and device type with the Web Interface
Note: Before AT commands are accepted, DSR must go high on the Digi device server.