Remote Expansion Cabinet Unit - Toshiba strata CT Installation & Maintenance Manual

Remote Expansion Cabinet Unit

The RRCU1A PCB enables a Strata CT 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.
H
C
Figure 2-31
A Strata CT Base Cabinet will support up to four RRCU1A PCBs, and 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 CT I&M Manual October 2000
Local Strata CT Cabinets
2
3
4
5
6
7
Remote Strata CT Cabinets
MSBU
Remote Expansion Cabinet (4)
Remote Expansion Cabinet Connection
Figure
Expansion Cabinet (2)
1 (M1)
2 (S1)
3 (M2)
Optical Module
4 (S2)
Base Cabinet
1 (M1)
2 (S1)
3 (M2)
4 (S2)
Remote Expansion Cabinet (3)
5235
2-31.
Strata CT Installation
Fiber Optic
Connection
Up to
3 Kilometers
(Dealer Supplied)
Optical
Module
Figure 2-34.)
2-49