Siemens SINAUT ST7 - 2.2 Connecting an MD2 to DTE, LTOP and Dedicated Line

Mounting and Installation
© Siemens AG 2002 All Rights Reserved 6NH7811-0AA22
MD2 Modem (07/2002)
2-21
2.2 Connecting an MD2 to DTE, LTOP and Dedicated Line
The following diagrams show various possibilities for connecting the MD2 modem
to a DTE (e.g. TIM) or other MD2 modems as well as to the dedicated line via an
LTOP.
For detailed information about connecting, switching and configuring LTOPs, refer
to section 2.3 LTOP Line Transformer with Overvoltage Protection.
2.2.1 Connecting an MD2 with a DTE via the RS232 Port
Only one MD2 modem can be connected to a data terminal equipment (e.g. TIM)
through the RS232 interface. The following illustrations show various terminal and
tapping point configurations.
2-Wire Terminal Point 4-wire Terminal Point
Fig. 2-10 Connection of an MD2 with a DTE via RS232,
configuration as 2-wire and 4-wire terminal points
DTE
MD2
Cable 6NH7701-4AL
RS232 RS232
Cable
6NH7700-2AR60
LTOP1
2-wire
dedicated line
LTOP1
overvoltage
protection
6NH9821-0BC11
Cable 6NH7701-4AL
RS232 RS232
Cable
6NH7700-2AR60
LTOP2
4-wire
dedicated line
LTOP2
overvoltage
protection
6NH9821-0BC12
TIM3V
TIM4
DTE
MD2
TIM3V
TIM4