Systech Corporation IPG-7700 Series, Руководство по оборудованию

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Installing the Hardware 9
Connecting Devices to the IPG
POS Terminal Port
The POS Terminal port is a phone line designed to function just like a standard wall-jack
analog phone line. It is designed primarily to connect POS (Point Of Sale) terminals, with an
internal modem, to the IPG, which then routes data from the devices over the network. The
IPG mimics the phone company, answering incoming calls and routing them to an internal
modem attached to each phone line, or generating calls from an internal modem to an
attached device.
The terminal lines and internal modems communicate up to 2400 baud and support the
following standards:
•
Bell 212A
•
ITU-T V.22
•
ITU-T V.22bis
•
V.22 FastConnect (Hypercom)
Serial Port
In the RS-232 definition, a pair of devices, one a terminal (Data Terminal Equipment or DTE)
and one a modem (Data Communication Equipment or DCE), are designed to plug directly
into each other. The IPG RS-232 serial port operates in DCE (modem) mode. The following
sections describe the pinouts and cabling options associated with this mode.
IPG/7700 DCE RS-232 Operation
Data Communication Equipment (DCE) mode is generally used to communicate with a
terminal device. This includes terminals, PC serial ports, printers and, generally, most
devices other than modems. When in DCE mode, the IPG/7700 port server family uses the
following pinouts: