Siemens TC12 사용자 설명서

 

TC12 Installation, Commissioning & Maintenance Handbook 

There are two sockets on the front of the OTU PCB. The sockets are labelled on 
the silk screen. The top socket is reply and the bottom socket is control. 
 

Mains switch and PC switch 
 
Switching the Test Set off, using the rocker switch on the front panel, does NOT 
guarantee isolation from the mains. 
 

To select the transmission mode the following procedure should be followed; 
 
Press and hold down the modem set button (before moving the modem mode 
select switch). 
Whilst keeping the mode set button depressed, turn the modem mode switch to 
the appropriate setting. 
Release the modem set button. 
 

Note.  If the modem set button is not depressed whilst the modem mode select 

switch is being moved, the test set may enter an unknown mode. 

 
BELL Modes: 
Switch Setting (Baud)  Full 

Description 

 
1200 equ 

 

 

 

Bell 202 with Equaliser Loopback 

1200 

    Bell 

202 

Main 

Loopback 

300 

    Bell 

103 

 
CCITT Modes: 
Switch Setting (Baud)  Full 

Description 

 
1200 equ 

 

 

 

CCITT V.23 M2 with Equaliser Loopback  

1200 

    CCITT 

V.23 

M2 

Main 

Loopback 

600 

    CCITT 

V.23 

M1 

 

300 

    CCITT 

V.21 

 

Note   Selections at 300 Baud are Originate when the test set is in Instation 

mode and Answer when the test set is in Outstation mode, and a mixture 
when in monitor mode (i.e. test set modem 1 control in Answer mode, test 
set modem 2 reply in Originate mode). This requirement is an automatic 
selection made by the test logic board. The user simply has to select 300 
baud and ITS mode. 

 

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