Toshiba DK14 Installation And Maintenance Manual page 305

DTMF Receiver Unit (BRCS-4, BRCS-8, BRCS-12)
There are three BRCSs: the BRCS-4 has four DTMF receiver circuits; the BRCS-8 has eight
receiver circuits; and the BRCS-12 has 12 receiver circuits.The BRCS is shown in
The B1CU can support up to 12 DTMF receiver circuits; all other processors can have up to 24
circuits. One BRCS can be installed on each processor PCB.
The DTMF receiver subassembly (BRCS) translates DTMF signals to data signals and attaches to
common control units with 4, 8, or 12 receiver circuits.
➤ To install an BRCS onto B1CU, B2CAU/B2CBU, B3CAU/B3CBU, or B5CAU/B5CBU
➤
Mate BRCS connectors (see
pressure to the BRCS to ensure proper mating of the connectors. Connectors for each BCU
card are shown on
processor, allowing up to 12 DTMF receivers on B1CU and 24 on all other processors.
The BRCS connectors on these PCBs are positioned to allow installation of the BRCS
Note
only in the proper position.
BRCS
Connector
Figure 7-24 BRCS Printed Circuit Board Connection Example
RSIU Installation
See "DK424 and DK424i RCIU1 or RCIU2 Installation"
Strata DK I&M 5/00
Figure 7-24) with the applicable BCU PCB. Apply firm, even
Figures 7-24~7-32. One BRCS (4, 8, or 12) can be installed on each
P1
UP
J1
BRCS
BCU
Step 6: BCU Processor PCBs
J4
J2
J3
BRCS
Connector
BRCS
Connector
5222
on Page 9-27.
DK424i Installation
Figure 7-24.
7-43