Siemens SINAUT ST7 - Page 215

Installing and putting a SINAUT modem into operation
5.5 MD2 dedicated line modem
Station control system
System Manual, 07/2009, C79000-G8976-C178-07
215
Connecting two MD2s to form a repeater
Two MD2 modems can be connected to form a repeater when the distances to be covered
are too great (2-wire or 4-wire repeater). The repeater amplifies the signal and regenerates
the individual characters. For more detailed information on calculating the distances that can
be covered depending on the baud rate and number of tapped stations, refer to the following
table.
/723
/723
/723
0'
7,0
0'
56 56
0'
5HSHDWHU
PDGHXSRI
[0'
1+&%FRQQHFWLQJFDEOH
&RQQHFWLQJFDEOH
1+$5
ZLUH
GHGLFDWHG
OLQH
ZLUH
GHGLFDWHG
OLQH
ZLUH
WDSSLQJSRLQW
ZLUHHQG
SRLQW
ZLUHHQG
SRLQW
/723RYHUYRO
WDJHSURWHFWLRQ
1+%&
/723RYHUYRO
WDJHSURWHFWLRQ
1+%&
&RQQHFWLQJFDEOH
1+$5
&RQQHFWLQJFDEOH
1+$5
1+$/FRQQHFWLQJFDEOH
RU1+'/
Figure 5-21 Two MD2s as 2-wire repeater with simultaneous 2-wire tapping of a TIM (for example
TIM 3V-IE)