Multitech MMH900 User Manual page 15

Chapter 1 - Introduction & Description
The composite link has to be configured for its parameters before data
can be transferred.
The composite link parameters are determined by more than just AT
commands transferred to the command processor. The composite link
parameters are determined by what type of device is used, whether it is
internal or external, speed, what type of remote multiplexer we are
communicating with and a number of line conditioning parameters. The
type of device used as the composite link device is determined by
whether the device is internal or external which is established by a DIP
switch setting and by the type of device installed in the MultiMux or
connected to the EXTERNAL COMPOSITE LINK RS232C/V.35
connector on the back panel. If an internal composite link MMH2834
modem is installed, the DIP switch would be set for an internal
composite link device. The type of MultiMux at the other end of the
composite link is determined by the setting of a four position DIP switch
within the MultiMux. The MultiMux MMH900 series is now ready to
transfer data from its async devices through an internal composite link
modem.
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