Siemens SINAUT ST7 - 3.1 Compatibility to SINAUT ST1 Modems

Instructions for Operation with SINAUT ST1
6NH7811-0AA22 © Siemens AG 2002 All Rights Reserved
3-2 MD2 Modem (07/2002)
3.1 Compatibility to SINAUT ST1 Modems
Introduction
In certain operating modes the MD2 modem is compatible to the dedicated line
modems that are used for SINAUT ST1. This compatibility is ensured in two ways:
1. You can build a new SINAUT ST1 station into an existing network and use the
MD2 modem to exchange data with an existing ST1 dedicated line modem as
the partner.
2. You can use the MD2 modem as a replacement for a defective ST1 dedicated
line modem.
Note
A new SINAUT ST1 station might also be a SINAUT ST7 device with an MD2
operating as an ST1 station.
For most applications it is possible to connect the MD2 modem to a SINAUT ST1
device without any special considerations having to be made. You simply need to
set the properties for the dedicated line, the operating mode and the character
format on the DIL switches of the modem.
In the following you will find detailed information about connecting the MD2 to a
SINAUT ST1 device.
Compatibility Matrix
The following table provides a compatibility matrix of the MD2 modem in
connection with the dedicated line modems used in the SINAUT ST1 system.
Table 3-1 Compatibility matrix of the MD2 modem and SINAUT ST1 dedicated line
modems
SINAUT ST1 Dedicated Line ModemOperating Mode
of the MD2
LGM 1200H1 MD100 MD124
1200 bps hx (2-wire)
X
1
)
3
) X
1
)
3
)
X
1200 bps dx (4-wire) -
X
1
)
3
)
X
2400 bps hx (2-wire) - -
X
2
)
2400 bps dx (4-wire) - -
X
2
)
9600 bps hx (2-wire) - - -
9600 bps dx (4-wire) - - -
1) Only in the "Normal" MD2 operating mode.
2) The baud rate 2400VF must be set for a MD124 with hardware version ≤ 3.
3) The MD2 at the opposite end must not be connected to the DTE via the RS485 interface.