en
| 7
Bosch Security Systems
| April 03 | 3922 988 97112 en
Digital Congress Network
| TCB 4 Upgrade Kit LBB 3519/20 | Chapter 2. Trunk Communication Board (TCB4)
2.4
S9 DIP-Switch settings
See fig. 2-1 for location, and Table 2.1 for functionality of the DIP-switches.
2.5 Jumper settings
See fig. 2-1 for location, and Table 2-2 for functionality of the jumpers.
Table 2.1 : S9 DIP-switch settings
TCB4
SW 1
ON*
OFF
Chairman priority tone ON
(default).
Chairman priority tone OFF
SW 2 ON
OFF*
Audio ‘Mix-Minus’ mode activated in combination with SW3 =
OFF
Normal Operation
(default).
SW 3
ON
OFF*
Audio ‘Insertion’ mode activated in combination with SW2 =
OFF
Normal Operation
(default).
SW 4
OFF Reserved
(IMPORTANT:
must not be changed)
SW 5 OFF Reserved
(IMPORTANT:
must not be changed)
SW 6 ON
OFF*
Active microphones and request will be permanently switched
off if the priority function of the chairman unit is used.
Active microphones will be switched off temporarily if the prior-
ity function of the chairman unit is used
(default).
SW 7
OFF Reserved
(IMPORTANT:
must not be changed)
SW 8 ON
OFF*
Switching on the CCU will activate the BOOT software, this
makes a new download possible. All memory settings will be
erased and returns to the default settings. The unit addresses
will not be erased.
Normal operation
(default).
* = default setting
DIP switch S9 (default settings)
For location
see fig.. 2-1.
S9
ON
12345678
switches 4, 5 and 7 are ‘RESERVED’
Must NOT be changed
Table 2.2 : Jumper settings
TCB4 Default Function
X13
1 & 2 Jumpered to provide SRAM Battery back-up
Open when removing back-up battery. (Position 2 & 3)
X14 1 & 2 Watchdog active
Open for service purposes. (Position 2 & 3)
