The diagrams below illustrate how the MD3 modem and the TIM module can be connected to the telephone outlet and which configurations are possible when the modem is used as a dedicated-line modem.
Telephone modem: Connection of the MD3 with a TIM and TAE6 telephone outlet
The diagram below illustrates how the MD3 modem, when operating in dial-up mode and using the standard connecting cable specified (the connecting cable is part of the scope of supply of the MD3), is connected to a TIM (via RS232) as well as to the telephone outlet (TAE6N socket). A telephone can be connected to the same telephone outlet in parallel with the modem (via the TAE6F socket).
Connection of a MD3 with a TIM and TAE6 telephone outlet
Dedicated-line modem: Connection of an MD3 to a TIM via the RS232 interface
One MD3 modem can be connected to a TIM via the RS232 interface. This technique can be used to set up a "point-to-point" network configuration.
Dedicated-line modem: Connection of several MD3 to a TIM via the RS485 interface
Several MD3 modems can be connected to a TIM via the RS485 interface. This type of interconnection is used if several dedicated lines have to be combined on a single WAN port on the TIM, i.e. if a point-to-point network is connected.
Dedicated-line modem: Maximum range (in km) of the MD3 modem
The table below can be used to calculate approximate values for the maximum distance in km which can be covered by the MD3 modem, depending on transfer rate. The values in the table are guide values for non-coil-loaded message lines type 2 x 2 x 0.8 J-Y(St)Y.
A level reserve of 4 dB was applied when calculating the maximum ranges. This should ensure that even in the event of deviations in cable characteristics, which experience has shown to be possible during operation, the level will always be sufficient to ensure fault-free data transmission.
Transfer rate (bps)
Maximum range (km)
Transmission level –15 dB
Transmission level -10 dB
With LTOP
Without LTOP
With LTOP
Without LTOP
With terminating resistor Z = Zr
300
29
30
34
35
1200 to 19,200
23
24
28
29
33600
14
15
19
20
skener.ru
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Арматура DENDOR
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Краны и Клапаны
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SKW-FK - Установка обезжелезивания