Specifications

Introduction
1-8 MP2100M-LS-2 Modules - Installation and Operation Manual
• For DTE interfaces, the lines are used as follows:
 The RTS line is an output, and the CTS line is an input (this input is
ignored, i.e., assumed to be asserted at all times).
 The DSR and DCD lines are inputs.
 The DTR line is an output, and is continuously ON.
Digital Channel Connectors
With respect to connectors, the digital channels are divided into two groups of
equal size. For ten-channel modules, the groups include the channels 1 through
5, and 6 through 10, respectively, whereas for six-channel modules, the groups
include the channels 1 through 3, and 4 through 6, respectively. Each group has
a separate connector.
• For the 4U-high modules, the connectors (44-pin female D-type connectors)
are located on the module panel itself. An adapter cable may be ordered to
separately connect each of the channels available in one connector to
individual user's equipment. Each cable terminates in five 25-pin D-type
connectors.
• For the 6U-high modules, the connectors (68-pin female SCSI connectors)
are located on interface modules.
Digital Channel Timing Modes
Timing in Synchronous Mode
When using the synchronous mode, each digital channel has three
user-selectable timing modes:
• DCE: the channel provides the transmit and receive clock signals to the
DTE connected to the channel. This mode can be used only when the DCE
interface is selected.
• External DCE (also called DTE1): the channel provides the receive clock
signal, and accepts the transmit clock signal from the equipment connected
to the channel (tail-end circuit). This mode can be used only when the DTE
interface is selected.
• DTE (also called DTE2): the channel uses the clock signals provided by
the DCE equipment connected to the channel for both its receive and
transmit paths, and buffers and retimes the incoming data. In this mode, the
receive and transmit timing is the same. This mode can be used only when
the DTE interface is selected.
Timing in Asynchronous Mode
LS-2A, LS-2A/2TS, MTLS-2 and MTLS-2/2TS channels can be operated in the
asynchronous mode by activating synchronous-to-asynchronous converters,
using an internal DIP switch. The converters can be independently
enabled/disabled for each channel group, as explained above.