Specifications

Introduction
MP2100M-LS-2 Modules - Installation and Operation Manual 1-7
Channel Characteristics
Channel Data Rates
The channels of all the LS-2 module versions, except the /2TS versions, support
user-selectable data rates of 2.4, 4.8, 9.6 and 19.2 kbps; the /2TS versions
support only 9.6 kbps.
Digital Channel Transmission Modes
For all the module versions, the channels can operate in the synchronous mode.
For the LS-2A, LS-2A/2TS, MTLS-2 and MTLS-2/2TS versions, channels can
also operate in the asynchronous mode.
With respect to mode selection (synchronous/asynchronous), the channels are
divided into three groups:
• For /X.50 and /SDM versions: channel 1, channels 2 through 5, and
channels 6 through 10.
• For /X.58 versions: channel 1, channels 2 and 3, and channels 4, 5, and 6.
For each group, the user can select the desired transmission mode, using an
internal DIP switch.
Digital Channel Interfaces
All the channels, except the channels of the LS-2/M module, which are
equipped with built-in modems, have V.24/RS-232 interfaces. The
V.24/RS-232 interface type is user-selectable (DCE or DTE). The method used
to select the interface type varies with the module version:
• For the MTLS-2 and MTLS-2/2TS versions, the selection is made by means
of jumpers.
• For the LS-2, LS-2A, and LS-2A/2TS versions, the selection is made by
using the appropriate adapter cables.
Each channel interface locally supports the following control signals: RTS,
CTS, DSR, DTR, and DCD. The functions of these lines depends on the
interface operation mode:
• For DCE interfaces, the lines are used as follows:
 The local CTS line is an output, and either follows the state of the RTS
line (which is an input) after a selectable delay (minimum or 50 msec),
or can be set to be always ON.
 The DSR line is an output, and is continuously ON.
 The DTR line is an input, but is ignored (assumed to be asserted at all
times).
 The DCD line is an output, and its state is selectable: continuously ON,
or ON only when the LS-2 module is synchronized.
The selections are made by software configuration.