Remote Expansion Cabinet Unit - Toshiba DK14 Installation And Maintenance Manual

DK424 Installation

Remote Expansion Cabinet Unit

Remote Expansion Cabinet Unit
The RRCU1A PCB enables a DK424 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 DK424 Base Cabinet will support up
to five RRCU1A PCBs. A DK424 will
support up to six 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.
The ROMS1A daughter board has an SC-type fiber connector, a connector for control of two
8-circuit DPFT units, and status LEDs.
5-60
Figure 5-39.
Local DK424 Cabinets
Expansion Cabinet (2)
1 (M1)
2 (S1)
2
3 (M2)
3
4
Optical Module
4 (S2)
5
6
7
Base Cabinet
4532
Remote DK424 Cabinets
MEBU
Remote Expansion Cabinet (4)
1 (M1)
3 (M2)
4 (S2)
Remote Expansion Cabinet (3)
Figure 5-39 Remote Expansion Cabinet Connection
Fiber Optic
Connection
Up to
3 Kilometers
(Dealer Supplied)
2 (S1)
Optical
Module
Strata DK I&M 5/00