Toshiba Strata AirLink DK40i, Installation And Maintenance Manual

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Universal Slot PCBs
PCB Chapter Layout
9-40
Strata DK I&M 6/00
RDSU – Digital/Standard Telephone Interface Unit
System:
DK40i Expansion KSU only, DK424, DK424i
Circuits per PCB:
(with RSTS) four standard telephone (circuits 1~4)/four digital telephone (circuits 5~8)
(without RSTS) two standard telephone circuits (1 and 2)/four digital telephone circuits
Interfaces with:
digital circuits
digital telephones (with or w/o RPCI-DI or ADM)
PDIU-DS
DDCB (circuit 5 only–ports 004, 012, 020, 028)
cordless digital telephone (DKT2004-CT)
standard circuits
standard telephones
voice mail ports
off-premises stations
other similar devices
alternate BGM source (circuit 2 only)
auto attendant digital announcer
message waiting lamp
Older Version(s):
none
An optional Standard Telephone Interface Subunit (RSTS) can be attached to the RDSU to provide
two more standard telephone ports (circuits 3 and 4).
RDSU and RSTS controls and interface connectors are shown in Figure 9-21 . RDSU interface
connectors are described in Table 9-14 .
Note
For the system to recognize the DTMF tones generated by incoming DID lines a DTMF
Receiver Unit (RRCS -4, -8, or -12) must be installed on the DK40i Base KSU K4RCU3,
or on any DK424 RCTU or DK424i BCU.
CAUTION!
To prevent system malfunction, DO NOT install the RDSU in slot 18 of the
DK40i system.
Installing R48S Ring Generator (Internal Option)
An optional R48S unit can be connected to the RDSU or RSTU to change the standard telephone
loop voltage from -24VDC to -48VDC, extending the standard telephone circuit loop length
(including the resistance of the phone) from 600 ohms to 1200 ohms. The features provided by the
R48S apply to the RSTS circuits as well as the basic RDSU standard telephone circuits.
➤
To install the R48S on the RDSU
➤
Mate the R48S connectors R6 and R7 with the RDSU connectors R6 and R7. RDSU
connectors P6 and P7 are positioned to allow installation of the R48S only in the proper
position (
Figure 9-28 ).
Installing RSTS (Internal Option)
➤
Mate the RSTS connectors P2~P5 with the RDSU connectors P2~P5. RDSU connectors
P2~P5 are positioned to allow installation of the RSTS only in the proper position (
Figure
9-21 ).