Binary Signal Transmission Via Leased Line; Modem Logem928 And Lgh28.8D (Firmware 4.13); Tab.2: Connector And Cable For Two-Wire Leased Line Operation - Siemens 7XV5653-0BA00 Operating Instructions Manual

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1.2.2 Binary signal transmission via leased line

modem LOGEM928 and LGH28.8D (firmware 4.13)

in two-pilot wire operation
• Setting the DIP switches at the modem
Before the modem is initialized the DIP switches are to be set as follows:
S1
¦¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦¦
off
on
1 2 3 4 5 6 7 8
Attention! Switch off the modem for this setting.
The changed settings are request only with the switching on of the
modem.
• Initialization of the modems
The modems are to be initialized before commissioning.
This is best be done with the help of a terminal program, e.g. Hyper-
terminal.
- A null modem cable is needed for the connection between PC and
modem where the terminal program runs.
- Reset the modem before initializing the modem (press the switch
when connecting the auxiliary supply until LED "A/O" flashes).
- Put in the following text string into Hyperterminal and press ↵ to
send them to the modem. Then the modem answers with OK.
- Than you can disconnect the modem from the PC interface and
connect the serial interface of the modem with the serial interface
of the converter.
For 19200 baud:
Modem A: AT &F0 \N0 \Q0 &D0 F40 S51=1 1 %C0 S20=0 &L2 E0 Q1 &W↵
Modem B: AT &F0 \N0 \Q0 &D0 F40 S51=11 %C0 S20=0 &L3 E0 Q1 &W ↵
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S2
¦¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦¦
9 10 1 2 3 4 5 6 7
s
Explanation of the commands:
&F0
\N0
\Q0
&D0
F40
S51=11
%C0
8 9 10
S20=0
&L2
&L3
E0
Q1
&W
Note:
Two-wire operated transmission was tested successfully with these
settings.
The baud rate chosen must also be adjusted at the two binary signal
transducers (also see setting at binary transducer 7XV5653).
Connector and cable for two-wire leased line operation
For two-wire leased line operation use the supplied cables with the
imprint leased line. The RJ-11 connector is to be connected to the socket
marked with LEASED.
The other end of the cable is to be connected to a TAE-N coded telephone
outlet box as follows.

Tab.2: Connector and cable for two-wire leased line operation

A 01/13 A 01/13
= Load factory setting
= Normal mode (without data compression,
no error correction)
= No flow control
= Control cable S1/108 is ignored
= Transmission mode V.34
= Fixed baud rate to terminal device (RS232 interface)
= No Data compression
= Ignore signs in the command phase
= Calling modem
= Accepting modem
= No echoe
= Switch off result codes
= Save settings in the EEPROM of the modem
TAE-N 1 TAE-N
1 1
2
2
2-channel Binary Signal Transducer
2
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