Remote Expansion Cabinet Unit - Toshiba STRATA DK14 Installation And Maintenance Manual

Remote Expansion Cabinet Unit

The RRCU1A PCB enables a
DK424i Expansion Cabinet to
be located up to three
kilometers from its Base
Cabinet. One RRCU1A
connects to up to two ribbon-
type Data Cables and applies
the inter-cabinet signal to a
fiber-optic pair. One fiber pair
can support one or two
expansion cabinets in one
remote location using one
RRCU1A in the Base Cabinet
and another in the Remote
Expansion Cabinet.
A DK424i Base Cabinet will
support up to five RRCU1A
PCBs. A DK424i will support
up to four Remote Expansion
Cabinets.
An inter-cabinet Data Cable in
the Base Cabinet is attached to
an RRCU1A which converts
the signal and uses an LED
source to apply the signal to
500 MHz/km multi-mode
fiber. Another RRCU1A in the
Remote Expansion Cabinet
receives the LED signal,
converts it back to its original form and applies it to a ribbon Data Cable connected to the Remote
Expansion Cabinet. See
This is a hardware solution and has no effect on software or administration. Remote cabinets
support all line and trunk interfaces. Network clock signals can only be derived from digital trunks
installed in the Base Cabinet (Master) location.
RRCU1A cards are used at both the Base (Master) and Remote (Slave) Cabinet locations. The card
set consists of an RRCU1A PCB and its ROMS1A daughter board. The RRCU1A connects to the
inter-cabinet Data Cables, holds the Remote/Slave option jumpers, and has an RS-232C port for
monitoring the fiber connection. (See
The ROMS1A daughter board holds an SC-type fiber connector, a connector for control of two
8-circuit DPFT units, and status LEDs.
Strata DK I&M 6/00
Local DK424 or DK424i Cabinets
2
3
4
5
6
7
Remote DK424 or DK424i Cabinets
MSBU
Remote Expansion Cabinet (4)
Remote Expansion Cabinet (3)
Figure 7-33 Remote Expansion Cabinet Connection
Figure 7-33.
Figure 7-36.)
Step 6: Remote Expansion Cabinet Unit
Expansion Cabinet (2)
1 (M1)
2 (S1)
3 (M2)
Optical Module
4 (S2)
Base Cabinet
1 (M1)
2 (S1)
Optical
3 (M2)
Module
4 (S2)
5235
DK424i Installation
Fiber Optic
Connection
Up to
3 Kilometers
(Dealer Supplied)
7-53