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Setting on DIL switch
*) For detailed explanations of the squelch function and "Reset Test receive", refer to Chapter 4 of the MD2 Modem Description 6NH7811-
0AA21 that can be ordered separately.
SINAUT ST7 station control system
System Manual, 09/2016, C79000-G8976-C178-10
Installation and commissioning of the modems and routers
Meaning
Control output switched with RTS
A floating optical relay is provided on pins 1 and 6 of the RJ-12
Western plug. This is active as long as the terminal device (TIM)
outputs the RTS signal (request to send) to the MD2 modem. This
control signal can be used to switch on a wireless device when the
MD2 modem is used in conjunction with a wireless system.
Reserved
Squelch OFF *)
This is a mandatory setting for the MD2 in conjunction with a TIM.
Squelch ON *)
This setting is not permitted for the MD2 in conjunction with a TIM.
Reset "Test receive" off / normal transmit level *)
Depending on the selected mode, this switch has two meanings:
In the "Test receive" mode, this switch setting has no function.
In all other modes, the transmit level for operation of the modem on
normal dedicated lines is set depending on switch S1 (5-pin DIL
switch) to 0 dB (S1 = ON) or –6 dB (S1 = OFF).
Reset "Test receive" on / reduced transmit level *)
Depending on the selected mode, this switch has two meanings:
In the "Test receive" mode, the test operation can be reset.
In all other modes, the transmit level for operation of the modem on
telephone company leased lines is reduced. Depending on switch S1
(5-pin DIL switch), the transmitter level is then set to
–9 dB (S1 = ON) or to –15 dB (S1 = OFF).
5.5 MD2 dedicated line modem
165
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