Installing R48S Ring Generator (Internal Option) - Toshiba Strata DK14 Installation And Maintenance Manual

DK40i/DK424 Universal Slot PCBs
PEPU2 External Page Interface Unit
RDSU
Digital/Standard Telephone Interface Unit
System:
Circuits per PCB:
Interfaces with:
Older Version(s):
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
connectors are described in
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.
CAUTION!

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
7-36
DK40i Expansion KSU only, DK424
(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
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
none
Table 7-13.
To prevent system malfunction, DO NOT install the RDSU in slot 18 of the
DK40i system.
(Figure 7-26).
Figure 7-19. RDSU interface
Strata DK I&M 5/99