Mounting and Installation
© Siemens AG 2002 All Rights Reserved 6NH7811-0AA22
MD2 Modem (07/2002)
2-15
Other Settings
Switched 8 to 10 on the 10-pin DIL switch are used to set the control output (see
section 2.1.11), the squelch function and the reset for the test modes.
Table 2-13 Settings on the 10-pin DIL switch (other functions)
Setting on
DIL Switch
Meaning
1234
OFF
ON
5678 910
Control output switches with RTS
A floating optical relay is provided on pins 1 and 6 of the RJ12
Western plug. This is active as long as the terminal keeps sending the
RTS signal (transmitter on) to the MD2 modem. This control signal
can be used to switch on a radio device when the MD2 modem is
used together with a radio system.
1234
OFF
ON
5678 910
Reserved
1234
OFF
ON
56789 10
Squelch off
This is a compulsory setting for the MD2 in connection with a TIM.
1234
OFF
ON
56789 10
Squelch on
This is a prohibited setting for the MD2 in connection with a TIM.
1234
OFF
ON
56789 10
Reset "Test receive" off / normal send level
This switch has two different functions depending on the selected
operating mode:
In "Test receive" mode this switch setting has no function.
In all other operating modes the send level for modem operation on
normal dedicated lines is set to 0dB or –6dB depending on the setting
of switch S1 (5-pin DIL switch).
1234
OFF
ON
56789 10
Reset "Test receive" on / reduced send level
This switch has two different functions depending on the selected
operating mode:
In "Test receive" mode the test mode can be reset.
In all other operating modes the send level for modem operation on
telecom leased lines is reduced. The send level is set to –9dB or to
–15dB depending on the setting of switch S1 (5-pin DIL switch).
Note
Details about the control output, squelch function and resetting 'Test receive' are
available in Chapter 4 Operating Modes and Character Recognition.
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