Multi-Tech Systems DT101/xx, DT102/xx owner manual System Features

DataTalker Owner’s Manual

1.4 System Features

1.4.1Voice/Fax

The voice/fax feature of the DataTalker allows you to establish voice or fax traffic on top of your normal data communications over a composite link, saving the expense of extra communications lines. The DataTalker provides three types of telephone circuits (FXS, FXO, and E&M) that allow a telephone, a fax machine, a PBX station card, or a PBX E&M trunk to be directly connected to it. In one configuration, these telephone circuits cause the telephone at a remote location to ring when you pick up the handset on the local telephone. In another configuration, an off-site extension moves your office extension to a remote location. In a third configuration, you can use the DataTalker to tie two PBXes together.

1.4.2Data Channel

The DataTalker data channel is able to accommodate any asynchronous device or any SDLC/ HDLC synchronous device. Configuration of the data channel is controlled by menus that determine the mode of operation (sync or async), whether or not clocking is necessary, the speed of the channel, and a number of async channel conditioning parameters.

1.4.3Composite Link

The DataTalker’s composite link is capable of synchronous and full duplex communications with an internal or external link device. Using an internal modem, ISDN terminal adapter, DSU, or external device, the DataTalker can be connected to different types of communications links, such as a dial-up line, a leased line, a Basic Rate Interface (BRI) ISDN service, or a DDS network. If an external link device is used, the DataTalker can communicate with it using either the RS232 or V.35 standard.

1.4.4Flow Control

Flow control regulates the volume of data entering the data port. When the channel buffer is almost full, a flow control command is issued which tells the device attached to the data port to stop sending data. The devices on both ends of the link must be configured for the same flow control method. The most common flow control methods are XON/XOFF and RS232C signal control (using CTS). The DataTalker supports these and ENQ/ACK.

DATATALKER-INITIATED

FLOW CONTROL

	DATA
Channel		DataTalker
Device

CHANNEL DEVICE-

INITIATED PACING

DATA

ChannelDataTalker Device

Flow control stops the input of data to the DataTalker

Pacing stops the output of data from the DataTalker

1.4.5Parameter Memory

A nonvolatile memory for storing configurations and options means that the DataTalker remains configured until you change it. You can configure a DataTalker and save the parameters to memory, turn it off, ship it, and use it without having to reconfigure it.

12